What is colorfastness to perspiration? How is it tested?

2025-09-12

Colorfastness to perspiration measures a textile fabric's ability to maintain color stability without fading or bleeding when exposed to human sweat. It is a critical parameter in textile quality testing. Human sweat is a complex mixture containing water, salts (such as sodium chloride), lactic acid, urea, and other components. These elements may chemically react with dyes in the fabric or cause dye migration under the influence of sweat's moisture and temperature, thereby affecting the fabric's appearance and lifespan. This indicator directly impacts the wear experience and durability of garments, being particularly critical for intimate apparel (such as underwear and sportswear) and infant/toddler clothing.

1. Purpose of Sweat Resistance Testing

Sweat resistance testing methods evaluate a material's color durability when exposed to prolonged contact with human perspiration. This is critical for products in close contact with the body, such as apparel, footwear, and accessories. The test simulates the effects of sweat on materials over time, enabling manufacturers to assess colorfastness under real-world usage conditions.

2. Operating Procedure for Sweat Color Fastness Tester

The GT-D09 Sweat Color Fastness Tester is suitable for assessing the sweat color fastness of various textile materials, dyed fabrics, and colored textiles. It evaluates resistance to sweat, water, seawater, saliva, chlorine bleach, and phenolsulfonated ethylamine.

Sweat fastness testing follows various international standards, such as ISO 105-E04, AATCC 15, and JIS L 0848. The test involves immersing textile or leather samples in a synthetic sweat solution containing specific concentrations of salts and acids to mimic human sweat composition.

The samples are then placed in an oven at a set temperature and humidity for a specified duration (typically 4-24 hours). After the sweat exposure period, samples are rinsed and dried, then evaluated for color change or staining using a gray scale or colorimeter. This test assesses color transfer from the material to other surfaces, as well as fading or discoloration of the material itself.

Sweat colorfastness test results are reported on a scale of 1-5 or 1-8, with higher numbers indicating greater resistance to sweat staining. This test is commonly used in the textile and leather industries to ensure products maintain their appearance and quality during use.

3. Significance of Sweat Testing in Textile Testing Methods

Sweat testing within textile testing methods holds significant importance in the textile and leather industries, as it provides manufacturers and consumers with valuable information regarding material quality and performance under real-world usage conditions. High levels of sweat colorfastness indicate that materials are less likely to fade or stain when exposed to perspiration, making them more durable and long-lasting.

Sweat fastness testing methods are standardized to ensure consistency and accuracy across different laboratories and testing facilities. This enables manufacturers to ensure their products meet industry standards and comply with regulations. Furthermore, this testing method can be used to identify potential quality issues in materials before incorporating them into finished goods, allowing manufacturers to address and correct any problems before they reach consumers.

4. Features of Sweat Fastness Testing Equipment

4.1. Steel frame and weight bags are constructed from 316L stainless steel, offering acid and alkali resistance with long-term corrosion resistance.

4.2. The sweat fastness tester provides ISO and AATCC acrylic separator plates.

4.3. The perspiration tester supplies ISO and AATCC standard pressing weights.

4.4. Perspiration testing requires the use of a high-precision drying oven.

5. Other Colorfastness Tests

Sweat resistance testing instruments represent only one of several methods used to evaluate the colorfastness of textiles and leather goods. Additional tests, such as wash fastness, lightfastness, and rub fastness, can be conducted to gain a more comprehensive understanding of a material's color durability.

Wash fastness testing involves subjecting materials to repeated washing cycles to assess resistance to fading or staining. Lightfastness testing exposes materials to artificial or natural light to evaluate resistance to fading. Rub fastness testing involves rubbing one material against another surface to assess resistance to color transfer.

6. Conclusion

In summary, the perspiration colorfastness test method is a crucial assessment technique used in the textile and leather industries to evaluate a material's resistance to fading or staining when exposed to human perspiration. This standardized test ensures consistency and accuracy, providing manufacturers and consumers with valuable information about a material's quality and performance under realistic conditions. Manufacturers can thereby ensure their products meet and comply with industry standards.

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#Sweat Resistance Tester #Sweat Color Fastness Tester #Sweat Tester for Textile Testing

What is yarn evenness testing? How is yarn evenness testing performed?

2025-09-12

1. What is yarn evenness testing?

Yarn evenness testing, in simple terms, is the measurement of the uniformity of yarn thickness along its length. As the basic raw material for textile products, the quality of yarn directly impacts the performance and appearance of subsequent textile products. Yarn evenness, as one of the key indicators of yarn quality, directly affects the quality of textile products.

2. The significance of yarn evenness testing

Conducting yarn evenness testing serves multiple important purposes. On one hand, it helps assess the quality level of yarn. Yarn with even thickness ensures clear fabric patterns, uniform color, and reduced defects during subsequent processing. For example, in weaving processes, uneven yarn may cause defects such as horizontal bands or clouding in the fabric, severely affecting its aesthetic appeal and practicality. On the other hand, testing can promptly identify issues in the spinning process, helping manufacturers adjust process parameters, optimize production workflows, improve production efficiency, and reduce production costs. For instance, if test results indicate that uneven yarn evenness is caused by a malfunction in the draw-off mechanism of the ring spinning machine, the company can target repairs or adjustments to the draw-off mechanism to improve yarn quality.

3. Yarn Evenness Testing Methods

In practice, there are several methods available for testing yarn evenness.

Among these, the traditional visual inspection method involves experienced inspectors directly observing the appearance of the yarn with the naked eye to assess its evenness. While this method is simple and straightforward, it is highly subjective, as different inspectors may have varying criteria for judgment, and it may be difficult to accurately detect subtle unevenness in the yarn.

The capacitive yarn evenness tester method utilizes the difference in dielectric constants between yarn and air. As yarn passes through capacitive plates, the capacitance value changes with yarn thickness. By detecting changes in capacitance, the method reflects yarn evenness. This method offers fast testing speed and high precision, accurately measuring unevenness in short yarn segments.

Another method is the photoelectric yarn evenness tester, which is based on the varying degrees of light obstruction by the yarn. It converts light signals into electrical signals through photoelectric conversion and then analyzes the yarn's evenness. This method is sensitive to changes in the yarn's surface morphology and can effectively detect defects such as yarn fuzz and details.

4. Yarn Evenness Testing Criteria

In yarn evenness testing, there are a series of important criteria used to quantify the test results. The Average Deviation Coefficient (U%) is one of the commonly used criteria, reflecting the degree of deviation between the actual linear density of each segment of the yarn and the average linear density. The smaller the U% value, the more uniform the yarn evenness. The coefficient of variation (CV%) is also used to measure yarn unevenness, similar to the average deviation coefficient, but with a slightly different calculation method. A lower CV% value indicates better yarn quality. Additionally, there is the blackboard yarn evenness test, which involves winding the yarn around a blackboard and comparing it to a standard sample to evaluate the yarn's evenness grade, categorized into superior, first-class, second-class, etc. A higher grade indicates better yarn evenness.

In the entire textile industry, yarn evenness testing plays a crucial role. From spinning mills to weaving mills, and then to garment processing factories, each stage has strict requirements for yarn evenness. For spinning mills, good yarn evenness test results indicate that the yarn they produce is of high quality, capable of meeting the needs of downstream enterprises, thereby enhancing the company's market competitiveness. Weaving mills use yarn with uniform evenness to produce stable-quality, aesthetically pleasing fabrics, reducing defect rates and improving economic efficiency. Garment processing plants utilize high-quality yarn fabrics to create comfortable, stylish clothing products that appeal to consumers. In summary, yarn evenness testing runs throughout the entire textile supply chain, serving as a critical component in ensuring textile quality and promoting the healthy development of the textile industry.

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#yarn evenness testing #Yarn Evenness Testing Methods #Yarn Evenness Testing Criteria

Why Is Dyeing and Finishing Testing Crucial in Textile Production

2025-09-12

The most commonly tested properties include wash resistance, light resistance, abrasion resistance, sweat resistance, ironing resistance, and climate resistance. In practice, the specific testing items are determined based on the product's intended use and product standards. For example, knitted underwear is tested for sweat resistance, while outdoor textiles (such as sunshades, billboard fabrics, and canopy materials) are tested for climate resistance.

1.Sunlight Fastness

Textiles are typically exposed to light during use, and light energy can degrade dyes, leading to the well-known phenomenon of “fading,” causing colored textiles to change color—generally becoming lighter or darker—and in some cases, altering their color tone. Therefore, it is necessary to test for colorfastness. Sunlight fastness testing involves exposing test samples alongside blue wool standard fabrics of different fastness grades under specified conditions to sunlight. The test samples are then compared with the blue wool fabrics to evaluate their sunlight fastness. The higher the grade of the blue wool standard fabric, the more light-resistant it is.

2.Wash fastness

The sample is sewn together with a standard backing fabric, washed, rinsed, and dried under appropriate temperature, alkalinity, bleaching, and friction conditions to obtain test results in a short period of time. The friction is achieved through rolling and impact of stainless steel balls in a small bath ratio, and the results are rated using a gray card. Different testing methods have different temperature, alkalinity, bleaching, and friction conditions, as well as sample sizes. Specific selections should be made based on testing standards and customer requirements.

3. Rubbing color fastness

Place the sample on a rubbing fastness tester and rub it with a standard rubbing cloth under a certain pressure for a specified number of times. Each group of samples must undergo both dry and wet rubbing color fastness tests. The color transferred onto the standard rubbing cloth is graded using a gray scale, and the resulting grade represents the measured rubbing color fastness. Friction colorfastness requires both dry and wet friction tests, and all colors on the sample must be subjected to friction.

4. Dry cleaning color fastness

Similar to water washing color fastness, except that water washing is replaced with dry cleaning.

5. Sweat stain color fastness

Sew the sample to the standard backing fabric, treat it in sweat stain solution, clamp it in a sweat stain color fastness tester, place it in an oven at a constant temperature, then dry it, and rate it using a gray card to obtain the test results. Different test methods have different sweat solution ratios, different sample sizes, and different test temperatures and durations.

6. Non-chlorine bleach colorfastness

The fabric is washed under non-chlorine bleach washing conditions, and the degree of color change is evaluated, which is the non-chlorine bleach colorfastness.

7. Pressing color fastness

Cover the dry sample with a cotton backing fabric, then press it for a certain period of time in a heating device at a specified temperature and pressure. Evaluate the discoloration of the sample and the color transfer to the backing fabric using a gray sample card. There are three types of heat pressing color fastness: dry pressing, damp pressing, and wet pressing. The specific test method should be selected based on different customer requirements and test standards.

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#rubbing fastness tester #rubbing fastness machine #rubbing tester

Why SGCC structural accessories are trending for modern machines

2025-09-12

You see sgcc structural accessories getting popular in new machines. They last a long time and do not rust easily. SGCC is special because it uses strong steel and works well. Careful making gives you the same good quality every time. You can change them to fit what your project needs. This gives you something that works well and does not break, even when used a lot. Think about using sgcc for your next machine project. You will see good results that last a long time.

Key Takeaways

SGCC structural accessories last a long time and do not rust easily. This makes them great for machines that need to work for many years. The hot-dip galvanisation process helps stop corrosion. It keeps machines safe from water and chemicals. SGCC steel parts do not wear out fast. They stay strong even when used every day. You can change SGCC accessories to fit your project. You can pick the size, shape, and logo you want.

SGCC accessories help machines work better and faster. They make sure machines run smoothly and do not break down often. It is easy to take care of SGCC parts. The zinc coating stops rust and makes cleaning simple. Using SGCC steel saves money over time. It lasts long and does not need much fixing. Smart SGCC steel accessories help machines work better. They also help you check how machines are working.

Durability and Longevity

You want machines to work for a long time. SGCC structural accessories help with this. SGCC steel uses hot-dip galvanisation. This puts a strong zinc coating on the steel. The zinc layer protects the steel for many years. Your machines get long-lasting corrosion resistance. This means your machines stay reliable. Zinc-plated steel sheets do not get damaged easily from daily use. You can trust SGCC to make your equipment last longer.

Wear Resistance

SGCC steel does not wear out fast. The zinc coating works like a shield. It keeps the surface smooth and strong. Hot-dip galvanisation makes the steel hard to scratch or dent. Zinc-plated steel sheets handle friction and impact better than regular steel. You see less damage as time goes on. SGCC structural accessories help machines run well, even with daily use.

Corrosion Resistance

Corrosion resistance is a big reason SGCC structural accessories are popular. SGCC steel uses hot-dip galvanisation to cover metal with thick zinc. This layer blocks moisture and chemicals. Zinc-plated steel sheets do not react much with water or air. You get strong protection against rain, humidity, and tough environments. Hot-dip galvanisation keeps machines safe outside or in factories.

Here is a table that shows how SGCC steel compares to other materials for corrosion resistance:

Material	Galvanisation Method	Zinc Coating	Corrosion Resistance	Rust Prevention
SGCC Steel	Hot-dip galvanisation	Thick	Excellent	Yes
Zinc-plated Steel Sheets	Electro-galvanisation	Thin	Good	Yes
Regular Steel	None	None	Poor	No

Rust Prevention
You do not want rust on machines. SGCC steel helps stop this problem. The zinc coating from hot-dip galvanisation stops rust before it starts. Zinc-plated steel sheets stay clean and shiny. Corrosion resistance means you spend less time fixing things. SGCC structural accessories keep machines looking new. You feel better knowing your equipment will not rust easily.

Jiaxin makes it simple to customize what you need. First, you send your drawings or a sample. The engineers check if they can make your design. You get advice from experts who know SGCC and building materials. If your design works, Jiaxin gives you a price. You look at the price and details. If you agree, Jiaxin makes a sample for you. You check the sample to see if it is right. This step helps you avoid mistakes and save money.

You see many reasons to choose sgcc steel for your machines. Sgcc steel gives you strong protection against rust. You get long-lasting parts that work well in tough places. Sgcc structural accessories help you build machines that last. You can pick custom designs and sizes for your project. Sgcc steel makes your equipment reliable and easy to care for. If you want better results, explore sgcc structural accessories for your next job. Contact Jiaxin to learn more or get a custom quote.

If you want to learn more about our products，please visit the website: https://www.jxprecise.com/

#SGCC crank support frame #SGCC crank metal stamping parts #Crank metal stamping parts

FK008 Full-Servo Valve Pocket Bag Making Machine - A New Benchmark for Efficient and Intelligent Packaging

2025-09-12

In today's increasingly competitive global packaging industry, companies are increasingly demanding efficient, precise, environmentally friendly, and intelligent production equipment. As a professional valve bag making equipment manufacturer, our FK008 valve bag making machine, with its leading automation technology, stable and reliable performance, and future-oriented intelligent features, has become an ideal choice for customers in the building materials, chemical, grain, and plastic weaving industries.

Pioneering a New Era in Valve Bag Making Equipment: Discover the Benchmark Technology of the FK008-III Valve Bag Making Machine

We are proud to introduce the advanced FK008 valve bag making machine, whose features and performance meet industry-leading standards, providing customers with a more stable, efficient, and intelligent packaging production experience.

1. Fully Servo Driven, the Perfect Combination of Speed and Precision

The Gachn Gourp FK00-III valve bag making machine utilizes a fully servo control system, offering greater flexibility and precision than traditional mechanical drives. It can achieve a stable bag-making speed of up to 120 bags per minute while maintaining a tolerance of ±0.5mm. Whether it's large-volume orders or demanding customized packaging, it can easily handle them.

2. World-Leading Web Guide and Unwinding System

The machine is equipped with an imported web guide to ensure the bag's center position remains stable during high-speed operation, with deviations controlled within ±1mm. Passive unwinding combined with magnetic powder braking ensures a stable material supply, reducing waste and downtime.

3. Patented Bag Opening Mechanism for Stable and Efficient Operation

The FK008 features a patented bag-opening technology. Unlike other bag-making machines, the Gachn Gourp FK008 utilizes a negative pressure blower and servo lever to ensure a smooth opening of the bag, avoiding common bag breakage or uneven openings. This innovative design combines high efficiency with low maintenance, significantly improving production continuity.

4. Optimized Heat Sealing and Forming Processes

Using constant temperature control and hot air welding technology, the temperature is stable and reliable, ensuring beautiful and strong welds. The triangular forming device and adjustable folding mechanism ensure smoother bag opening formation and adaptability to different bag shapes.

5. Intelligent Monitoring and Remote Diagnosis

The equipment features a built-in data monitoring system and optional cloud-based remote diagnostics. Users can not only monitor production status in real time, but also perform remote troubleshooting and maintenance, greatly improving equipment management efficiency and reducing the risk of downtime.

6. High-Precision Visual Inspection System

The FK008 can be equipped with an optional 4K industrial camera for visual inspection, enabling real-time monitoring of bag surface and bag opening quality. Its rejection accuracy exceeds 96.5%, with a false rejection rate below 0.15%, ensuring that every valve bag leaving the factory meets high quality standards. 7. User-Friendly Design for Easier Operation

A fully graphical user interface allows for intuitive parameter adjustment and is equipped with a safety protection system and fault alarm system. If any safety door is opened, the machine will immediately shut down, ensuring operator safety.

FK008 Valve Bag Making Machine: Beyond Innovation

Learning from the Gachn Group's extensive experience in packaging technology, our FK008 valve bag making machine is a cost-effective and practical professional solution for customers seeking high returns and consistent quality.

AI visual inspection for valve bag making machines

Core Feature 1: Comprehensive Performance Comparable to Benchmark Systems

Equipped with a high-precision visual inspection system (4K industrial camera), it achieves a rejection accuracy of at least 96.5% and a false rejection rate below 0.15%, essentially matching the automatic screening function of the qualiSTAR II.

Feature 2: Comprehensive Automation and User-Friendly Design

A fully servo-driven system enables quick and flexible format changes and adjustments.

A passive unwind combined with an inboard web guide maintains stable feed rates with an error of less than ±1 mm. A comprehensive safety system ensures safe operation and reliable processes.

Feature 3: Modularity and Easy Maintenance

The microperforation, bag opening, folding, and welding mechanisms utilize adjustable, modular, or servo-controlled structures, simplifying replacement and maintenance.

An early warning system and floating tension control ensure continuous production and minimize downtime.

Feature 4: Independently Developed and Patented, Legal and Compliant for Greater Peace of Mind

Unlike some copycat equipment, the FK008 valve bag making machine boasts a completely independently developed patented design encompassing key aspects such as the bag opening mechanism, forming process, and control system.

Legal and Compliant: Avoids the risk of patent infringement, ensuring customer investment security.

Technological Innovation: Provides unique solutions to the pain points of valve bag production.

Long-Term Guarantee: Customers can confidently export to global markets without being restricted by intellectual property barriers.

Drawing on industry-leading converting line technology, Gachn Group's FK008 valve bag making machine truly combines professionalism and reliability with high cost-effectiveness and practicality. Whether you prioritize stable production, high output, or seek intelligent automation and easy maintenance, the FK008 will meet and exceed your expectations. We look forward to helping you reach new heights in intelligent packaging and lead the market. If you would like further technical support or English promotional materials, I'm always here to assist you!

#valve bag making machine #W&H valve bag conversion line #FK008 valve bag machine #AD STAR Conversion line #automatic valve bag machine #high-speed valve sack production machine

Why Choose a Gachn Six-Shuttle Circular Loom? Five Key Advantages

2025-09-12

In the plastic weaving machinery industry, circular looms are core equipment for producing various products, including tubular fabrics, woven bags, geotextiles, and filter screens. Among numerous brands and models, the GC-FYB850-6 six-shuttle circular loom launched by Jiachuang Group has become the preferred choice for many companies due to its superior performance and intelligent design. Combining its technical features with market feedback, I will explain five key reasons for choosing a Jiachuang six-shuttle circular loom.

1. Efficient Production and Increased Productivity

Gachn Group circular looms utilize a six-shuttle design, achieving a maximum speed of 160 rpm and a shuttle picking frequency of up to 960 times per minute, significantly exceeding traditional four-shuttle models. This results in higher weaving density and faster speeds per unit time, making it particularly suitable for high-volume, high-demand woven bag production, significantly improving overall production efficiency. (Circular loom speed video)

II. Intelligent Control, Easy Operation

Gachn Group circular looms are equipped with a Delta PLC control system and human-machine interface (HMI), enabling synchronized control of the entire machine, automatic fault alarms, and one-touch parameter setting. Operators can easily monitor operating status and adjust process parameters via the touchscreen, significantly reducing manual intervention and operational errors.

III. Energy-Saving and Environmentally Friendly, Easy Maintenance

New flat cam structure: Smooth operation, low energy consumption, and low noise.

Oil-free shuttle lubrication: Prevents oil contamination of the fabric, making it particularly suitable for high-standard industries such as food packaging and environmentally friendly materials.

Servo motor drive: Lifting, warp let-off, and cloth winding are all controlled by servo motors, ensuring precise and energy-efficient operation.

IV. Excellent Fabric Quality and Wide Applicability

Gachn Group circular looms are equipped with a high-precision automatic warp tension control system, ensuring uniform tension on each warp yarn, resulting in high-quality, smooth, and uniformly dense tubular fabrics. They support a fabric fold diameter range of 300–850 mm, flexibly meeting the production needs of diverse product specifications.

Ⅴ. Stability and Reliability, Brand Guarantee

Jia Chuang Group has many years of technical experience and a strong market reputation in the field of weaving machinery. This machine utilizes key electrical components (such as the Delta PLC, servo system, and Omron relays) from renowned domestic and international brands, ensuring long-term stable operation, minimal failure rates, and a long service life.

Conclusion

The Gachn Group six-shuttle circular loom not only boasts high-efficiency and high-precision production technology, but also excels in intelligent, energy-saving, and environmentally friendly design. It is an ideal upgrade option for modern woven bag manufacturers. If you're looking for a reliable, efficient, and easy-to-operate circular loom, the Gachn Group six-shuttle circular loom is undoubtedly worthy of your trust.

For more technical specifications or customized solutions, please contact us for detailed information.

#ad starbag circular loom #Valve Bag Circular Loom #six shuttle circular loom #circular loom machine parts #W&H Plastic Circular Loom #LOHIA Plastic Circular Loom

Analysis of the development trend of ball screws in the next three years

2025-09-09

As a core component in the field of precision transmission, we predict that the development of ball screws in the next three years will be deeply affected by the needs of industrial automation, high-end manufacturing and emerging technologies. The following is a detailed analysis of the main development trends:

ball screw

1. Nanjing Chunxin adopts technology upgrades and performance breakthroughs

Higher precision and rigidity: With the increase in precision requirements in fields such as semiconductor equipment and medical machinery (such as nano-level positioning), ball screws will further improve repeat positioning accuracy (possibly within ±1μm) and axial rigidity by optimizing groove design, material heat treatment process and preload control.

High speed: Through lightweight design (such as hollow shaft) and low-noise steel ball circulation technology, the speed is expected to exceed 2000 rpm to meet the needs of high-speed CNC machine tools and robots.

Integrated intelligent functions: "Smart screws" with built-in sensors (temperature, vibration, load monitoring) will become popular, and predictive maintenance will be achieved through real-time data feedback to reduce unplanned downtime.

2. Nanjing Chunxin updates materials and process innovation

New material applications: The use of ceramic balls or hybrid ceramic bearings will reduce weight and friction, while high-strength alloy steels (such as nitrided steel) can extend life to more than 200,000 hours.

Manufacturing process innovation: 3D printing technology may be used for customized end caps or nut structures to reduce assembly errors; ultra-precision grinding technology combined with AI quality control will improve consistency.

3. Industry application expansion

New energy and electric vehicles: The demand for high-precision linear motion in battery production lines (such as pole piece slitting equipment) will drive the market growth of large-load ball screws (>10 tons axial load).

Aerospace: Lightweight and extreme temperature-resistant screws are used in scenarios such as drone servos and satellite deployment mechanisms.

Medical robots: Surgical robots require miniaturized (diameter <6mm) and non-magnetized ball screws, which give rise to demand for special materials.

Summary

The ball screw industry will develop in the direction of precision, intelligence, and scenario-based. Although it faces pressure to replace linear motors, it is still irreplaceable in terms of cost-effectiveness, reliability, and specific application scenarios. Nanjing Chunxin is also constantly improving product technology to achieve more reliable and stable performance.

If you are looking for high - quality products, welcome to visit our website at www.chunxinauto.com to learn more product information. We look forward to cooperating with you to jointly unlock a new chapter of creativity.

To sum up, if you have any questions, please contact us. We are always online and welcome your consultation.

#ballscrews #ball screw linear #ball screw and nut #hiwin Ball Screw #ball screw nut #ball screw bearing

How to distinguish the difference and application of spline screw and ball screw

2025-09-09

In the mechanical industry, spline screws are often used as transmission elements, and people often compare them with ball screws. In fact, they are different. Spline screw and ball screws each have their own unique functions and characteristics in the field of mechanical transmission. So, what is the difference between the two?

There are obvious differences in the structure of the two. The spline screw is mainly composed of a spline shaft and a spline sleeve. There are corresponding ball grooves on the spline shaft, and the balls roll in these grooves, while the spline sleeve is tightly sleeved on the outside of the shaft and connected to the shaft through the balls.

The ball screw is composed of a screw and a nut. The balls are embedded in the spiral grooves of the screw, and the nut is tightly sleeved on the screw, cooperating with the balls to realize the conversion between rotational motion and linear motion.

Secondly, the functions of the two are also different. The spline screw is mainly used to connect two shafts and allow relative rotation between the shafts while transmitting torque.

The main function of the ball screw is to convert rotational motion into linear motion, or to convert linear motion into rotational motion.

In addition, the applications of the two are also different. Spline screws are particularly suitable for fields with extremely high requirements for precision and reliability, such as semiconductors and medical devices, due to their high precision, high speed, and low friction.

Ball screws are widely used in CNC machine tools, automation equipment, CNC working machinery, semiconductor-related equipment, and industrial robots.

Although both spline screws and ball screws are components of ball transmission, they have their own advantages in structure, function, and application field. When choosing, you need to choose the appropriate component according to the specific mechanical transmission needs.

We are the source factory direct sales ，If you need any information, please contact us +86 17372968085，website：https://www.chunxinauto.com/contact

#High-precision spline screw #C3 C5 ball screw sfu1610 #Ball screw manufacturer #Low noise high frequency ball screw #thk hiwin ball screw spline screw #ball screws and thk spline screw

What’s the difference between Chunxin’s brand and Thk?

2025-09-09

There is still a certain gap between Chunxin and THK in terms of performance, precision, life and reliability, but in recent years Chunxin has made significant progress in technology learning from international brands, and some of Chunxin's high-end products are close to the technical level of THK. The following are the main differences:

1. Materials and heat treatment

THK Ball Screw:

Using high-quality alloy steel (such as SCM, SUJ2), strict heat treatment process (such as carburizing quenching, low temperature deep cryogenic treatment), uniform hardness, strong wear resistance, and good residual stress control.

CHUNXIN Ball Screw:

The material purity (such as GCr15) and heat treatment stability are slightly inferior, and uneven hardness or deformation is prone to occur, but Chunxin has now introduced advanced heat treatment equipment, and the gap is gradually narrowed.

2. Manufacturing process and precision

THK Ball Screw:

Precise grinding process (thread raceway roughness Ra≤0.1μm), precise preload control.

The precision level can reach ISO P1~P3 (C0~C3), and the reverse clearance is extremely small (≤0.005mm).

CHUNXIN Ball Screw:

The low-end and mid-end products are mainly rolled, and the precision is mostly P5~P7 (C5~C7); the high-end ground screw can reach P3.

There are still fluctuations in the consistency of preload force and the accuracy of raceway shape, but the process is improved through CNC grinders.

3. Life and reliability

THK Ball Screw:

The dynamic load life calculation is conservative (such as THK's nominal life can reach 100,000 hours), and the failure rate is low in actual use.

CHUNXIN Ball Screw:

The nominal life is close (refer to ISO 3408 standard), but due to the influence of materials, lubrication and assembly, noise may increase or precision may decrease after long-term use. Chunxin improves reliability by optimizing ball circulation design (such as the reverser structure).

4. Technological innovation

THK Ball Screw:

Many patented technologies (such as THK's "Hatchet" returner).

Provide high value-added solutions (such as dustproof seals, high-speed silent design).

CHUNXIN Ball Screw:

Has advantages in customized services (such as non-standard strokes) and cost-effectiveness.

5. Price and delivery cycle

THK Ball Screw:

High price (about 2~3 times that of domestic products with the same specifications), long delivery cycle (usually 8~12 weeks).

CHUNXIN Ball Screw:

Obvious cost advantage (especially low-precision models), fast delivery (2~4 weeks for conventional models), suitable for scenarios with limited budgets or urgent replacement.

Based on the above analysis, the Chunxin brand is gradually moving towards international standards. In the future, Chunxin will continue to learn to bring ball screws into intelligence through intelligence. If you are interested, please contact us at https://www.chunxinauto.com/contact, looking forward to your information.

#ball screw assembly #ball head screws #ball screw end support #sfu1605 ball screw manufacturers #ball screw lead formula #THK Ball Screw

Is R407C Compatible With Any Refrigerant?

2025-09-09

Refrigerant gas R407C has been a reliable choice for air conditioning and heat pump systems, especially since the phase-out of R22. It’s known for being a high efficiency refrigerant and a more eco-friendly alternative. But a common question arises:

Can R407C be used with or mixed with other refrigerants?

Let’s explore what makes R407C refrigerant unique—and why compatibility matters more than you might think.

What Is R407C?

R407C is a zeotropic HFC blend made up of:

R32 (23%)

R125 (25%)

R134a (52%)

This combination gives refrigerant gas R407C a good balance of cooling performance, energy efficiency, and environmental safety (no ozone depletion). It’s commonly used in residential and commercial systems, and it's often considered a go-to R22 replacement.

Since it's chlorine-free, eco-friendly refrigerant R407C meets global environmental regulations like the Montreal Protocol.

Is R407C Compatible With Other Refrigerants?

The short answer: No. Don’t mix refrigerants.

Even though some refrigerants may appear similar, R407C refrigerant is not compatible with:

R22 (its predecessor)

R410A

R134a

Or any other refrigerant

Here’s why:

R407C is a zeotropic blend, which means it has a glide—its components boil at different temperatures. Mixing it with another refrigerant changes the pressure-temperature relationship and disrupts system performance.

Mixed refrigerants can lead to:

Inaccurate superheat/subcooling readings

Reduced efficiency and cooling capacity

Compressor overheating or failure

Loss of manufacturer warranty

In many countries, it's illegal to mix refrigerants due to safety and environmental risks.

What If I’m Replacing R22?

You can use R407C refrigerant for R22 system retrofits, but the process must be done correctly.

Key retrofit steps:

Recover all R22 (don’t mix)

Flush or replace components if needed

Switch from mineral oil to POE oil

Check for material compatibility (especially seals and O-rings)

Charge the system with pure, high efficiency refrigerant R407C

Skipping these steps can reduce efficiency or cause leaks.

Are There Better Alternatives?

While eco-friendly refrigerant R407C is still widely used, newer low-GWP options are entering the market, such as:

R32 (higher efficiency, but mildly flammable)

R454B (lower GWP, designed to replace R410A)

However, if your system is designed for or retrofitted to R407C refrigerant, it remains a cost-effective and efficient solution—just don’t mix it.

Final Thoughts

R407C is not compatible with other refrigerants. Mixing it with anything else, including R22 or R410A, is unsafe, inefficient, and potentially illegal.

If you're using refrigerant gas R407C, keep it pure.

If you’re switching from another refrigerant, retrofit properly.

And when in doubt, always consult a certified HVAC technician.

#High efficiency R407C refrigerant #Pure R407C Refrigerant Gas #Eco-friendly R407C refrigerant #R407C refrigerant for air conditioners #High-Purity R407C Refrigerant

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