China Hot selling CHINAMFG High-Speed Planetary Roller Screw for Automotive Worm Gears (CHRC Series, Lead: 10mm, Shaft: 48mm)

Product Description

KGG High Quality Planetary Roller Screws-CHRC Series

Load Capacity Life
 
  The advantage of a planetary roller screw is the ability to provide higher dynamic and static load ratings than a ball screw. A threaded roller instead of a ball will allow the load to be released quickly through numerous contact lines, resulting in a higher resistance to impact. From Hertz’s law of pressure, we can conclude that a planetary roller screw can withstand 3 times the static load of a ball screw and 1 1/2 times the life of a ball screw.

Speed and Acceleration
 
  Planetary Roller Screws can provide higher rotational speeds and higher acceleration, and the lead length of a Planetary Roller Screw can be smaller than that of a Ball Screw. Since the lead of a planetary roller screw is a function of the pitch, the lead can be less than 0.5mm or less. The lead of a planetary roller screw can be designed to be calculated as an integer or fractional number (e.g., 3.32mm per transfer) and will not require a reduction gear to match. The change in lead does not introduce any change in geometry to the screw shaft and nut.
In contrast, the lead of the ball screw is limited by the diameter of the ball, thus the lead will be standard.

Stiffness and Strength
 
  The numerous contact lines of the planetary roller screw will substantially increase the stiffness and impact resistance.
 
Application:

  CNC machine tools, robotics, aviation (aircraft/helicopter), aerospace (rocket/satellite), weaponry (tank/canon/missile/aircraft carrier/nuclear submarine).

  Precision injection molding machines, mechanical presses, medical industry, measuring instruments, special machine tools, laser equipment, petroleum industry, chemical industry, optical instruments, metallurgical equipment, automotive industry, servo-electric cylinders, etc.

Technical Drawing


Specification List
  

                                           
Type D x P N d0 d1 d2 C Co D1 D2 D5 D7 L1 L1 L2 L3 L4 L5 L6 L7 D8
      mm mm mm kN kN mm mm mm mm mm mm mm mm mm mm mm mm mm
CHRC/F/P 39×5 5 39 39.35 38.54 0.84 129.2 245.2 80 116 11 98 90 100 82.7 28 6 30 18 18 45
CHRC/F/P 39×10 5 39 39.74 38.12 0.88 153.4 257.4 80 116 11 98 90 100 82.7 28 6 30 18 18 45
CHRC/F/P 39×15 5 39 39.92 37.49 0.89 168.8 251.1 80 116 11 98 90 100 82.7 28 6 30 18 18 45
CHRC/F/P 39×20 5 39 40.15 36.9 0.9 173.7 275.5 80 116 11 98 90 100 82.7 28 6 30 18 18 45
CHRC/F/P 39×25 5 39 40.5 36.8 0.9 175.3 261.7 80 116 11 98 90 100 82.7 28 6 30 18 18 45
CHRC/F/P 44×6 6 44 44.35 43.54 0.84 166 301.2 80 118 11 100 105 115 82.7 35 6 35 18 18 50
CHRC/F/P 44×12 6 44 44.65 43.03 0.88 175.3 310.5 80 118 11 100 105 115 82.7 35 6 35 18 18 50
CHRC/F/P 44×18 6 44 44.9 42.47 0.89 183.3 305.7 80 118 11 100 105 115 82.7 35 6 35 18 18 50
CHRC/F/P 44×24 6 44 45.12 41.88 0.9 190.2 306.8 80 118 11 100 105 115 82.7 35 6 35 18 18 50
CHRC/F/P 44×30 6 44 45.28 41.23 0.9 175.3 302.4 80 118 11 100 105 115 82.7 35 6 35 18 18 50
CHRC/F/P 48×5 5 48 48.35 47.54 0.82 198 410.8 100 150 13.5 127 115 127 103 45 8 37 20 20 55
CHRC/F/P 48×10 5 48 48.67 47.05 0.87 215.6 432.7 100 150 13.5 127 115 127 103 45 8 37 20 20 55
CHRC/F/P 48×15 5 48 48.99 46.53 0.88 225.3 435.7 100 150 13.5 127 115 127 103 45 8 37 20 20 55
CHRC/F/P 48×20 5 48 49.21 45.97 0.89 227.3 473.4 100 150 13.5 127 115 127 103 45 8 37 20 20 55
CHRC/F/P 48×25 5 48 49.43 45.38 0.9 230.5 468.4 100 150 13.5 127 115 127 103 45 8 37 20 20 55
CHRC/F/P 48×30 5 48 49.62 44.75 0.89 220.7 458.5 100 150 13.5 127 115 127 103 45 8 37 20 20 55
CHRC/F/P 48×6 6 48 48.35 47.54 0.84 190.1 401.7 86 122 11 104 115 127 88.7 45 6 37 20 20 55
CHRC/F/P 48×12 6 48 48.66 47.04 0.88 207.6 427.9 86 122 11 104 115 127 88.7 45 6 37 20 20 55
CHRC/F/P 48×15 6 48 48.79 46.76 0.88 214.2 430.1 86 122 11 104 115 127 88.7 45 6 37 20 20 55
CHRC/F/P 48×18 6 48 48.92 46.49 0.89 215.4 428.3 86 122 11 104 115 127 88.7 45 6 37 20 20 55
CHRC/F/P 48×20 6 48 49 46.3 0.89 216.9 485.7 86 122 11 104 115 127 88.7 45 6 37 20 20 55
CHRC/F/P 48×24 6 48 49.15 45.91 0.9 230.4 435 86 122 11 104 115 127 88.7 45 6 37 20 20 55
CHRC/F/P 56×6 6 56 56.36 55.3 0.8 213.1 420.6 100 150 13.5 127 125 139 105 50 8 37 22 20 60
CHRC/F/P 56×9 6 56 56.6 55 0.83 257 449.2 100 150 13.5 127 125 139 105 50 8 37 22 20 60
CHRC/F/P 56×12 6 56 56.8 54.7 0.87 242 460.6 100 150 13.5 127 125 139 105 50 8 37 22 20 60
CHRC/F/P 56×15 6 56 57 54.4 0.87 258 505.8 100 150 13.5 127 125 139 105 50 8 37 22 20 60
CHRC/F/P 56×18 6 56 57.2 54.1 0.87 268 514.6 100 150 13.5 127 125 139 105 50 8 37 22 20 60
CHRC/F/P 56×24 6 56 57.5 53.8 0.88 296 514.6 100 150 13.5 127 125 139 105 50 8 37 22 20 60

FACTORY DETAILED PROCESSING PHOTOS
 

FAQ

1. Why choose CHINAMFG China?

  Over the past 17 years, CHINAMFG has always insisted that “products and services” start from Japanese industry standards,taking ZheJiang standards as the bottom line, actively invest in the development of new transmission components and self-experiment and test. With the service tenet of “exceeding customer expectations”, establish a “trusted” partnership.

2. What is your main products ?

We are a leading manufacturer and distributor of linear motion components in China. Especially miniature size of Ball Screws and Linear Actuators and linear motion guideways.  Our brand “KGG” stands for ” Know-how,” ” Great Quality,” and ” Good value”  and our factory is located in the most advanced  city in China: ZheJiang  with the best equipment and sophisticated technology, completely strict quality control system. Our aim is to supply world leader class linear motion components but with most reasonable price in the world.

3. How to Custom-made (OEM/ODM)?

If you have a product drawing or a sample, please send to us, and we can custom-made the as your required. We will also provide our professional advices of the products to make the design to be more realized & maximize the performance.

4. When can I get the quotation?
 
 We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price,please call us or tell us in your email so that we will regard your inquiry priority.

5. How can I get a sample to check the quality?

 After confirmation of our quoted price, you can place the sample order. The sample will be started after you CHINAMFG back our detailed technical file. 

6. What’s your payment terms?

  Our payment terms is 30% deposit,balance 70% before shipment /* March 10, 2571 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Precision: C0,1,2,3,5,7,10
Screw Diameter: 48.67mm
Flange: With Flange
Nut Number: Single
Rows Number: 3-Row
Nut Type: End Cap Type / Elbow Type / Circulator Type
Customization:
Available

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worm screw

What are the common issues or failures associated with worm screws?

Worm screws, like any mechanical component, can experience certain issues or failures over time. Understanding these common problems is important for proper maintenance and troubleshooting. Here are some common issues or failures associated with worm screws:

  1. Wear and Surface Damage: Due to the sliding contact between the threads of the worm screw and the teeth of the worm wheel, wear can occur over time. This wear can lead to surface damage, such as pitting, scoring, or galling. Excessive wear and surface damage can affect the performance and efficiency of the worm screw gear system, resulting in increased backlash, decreased torque transmission, and potential failure.
  2. Lubrication Problems: Inadequate or improper lubrication is a common cause of issues in worm screw systems. Insufficient lubrication can lead to increased friction, heat generation, and accelerated wear. On the other hand, over-lubrication can cause excessive drag and fluid churn, leading to inefficient power transmission. It is important to follow the manufacturer’s recommendations for lubrication intervals, types of lubricants, and proper lubrication techniques to ensure optimal performance and longevity of the worm screw system.
  3. Backlash and Inaccuracy: Backlash refers to the play or clearance between the threads of the worm screw and the teeth of the worm wheel. Excessive backlash can result in reduced accuracy, loss of motion control, and diminished overall system performance. Backlash can be caused by factors such as wear, misalignment, or improper assembly. Regular inspection and adjustment of backlash are necessary to maintain the desired precision and minimize the effects of backlash-related issues.
  4. Misalignment: Misalignment between the worm screw and the worm wheel can result in increased friction, wear, and inefficiencies. Misalignment can occur due to factors such as improper installation, component deformation, or external forces. It is essential to ensure proper alignment during installation and periodically check for misalignment during routine maintenance. Adjustments should be made as necessary to maintain optimal performance and prevent premature failure.
  5. Overloading: Subjecting the worm screw gear system to excessive loads beyond its design limits can lead to failure. Overloading can result in accelerated wear, tooth breakage, or component deformation. It is important to operate the system within the specified load limits and consider factors such as shock loads, dynamic loads, and variations in operating conditions. If higher loads are required, it may be necessary to select a worm screw system with a higher load capacity or redesign the system accordingly.
  6. Corrosion and Contamination: Corrosion and contamination can negatively impact the performance and lifespan of worm screw systems. Exposure to moisture, chemicals, or abrasive particles can lead to corrosion, rusting, or damage to the surfaces of the worm screw and worm wheel. Contamination can interfere with smooth operation and cause accelerated wear. Proper environmental protection, regular cleaning, and appropriate sealing measures can help mitigate the effects of corrosion and contamination.
  7. Insufficient Stiffness: Worm screws rely on proper support and stiffness to maintain accurate positioning and prevent deflection. Inadequate stiffness in the supporting structure or mounting arrangement can result in excessive deflection, misalignment, and decreased performance. It is crucial to ensure that the worm screw system is properly supported and mounted to maintain the required rigidity and stiffness for optimal operation.

It’s important to note that the specific issues or failures associated with worm screws can vary depending on factors such as the application, operating conditions, maintenance practices, and the quality of the components. Regular inspection, proper lubrication, alignment checks, load monitoring, and adherence to manufacturer guidelines are essential for minimizing the occurrence of these issues and ensuring the reliable and efficient operation of worm screw systems.

worm screw

What are the latest innovations in worm screw design and materials?

In recent years, there have been several notable innovations in worm screw design and materials that aim to improve performance, efficiency, durability, and overall functionality. Here are some of the latest advancements in this field:

  • Advanced Materials: One of the significant trends in worm screw design is the use of advanced materials. Manufacturers are exploring materials with enhanced strength, wear resistance, and fatigue properties. For example, advanced alloys and composite materials are being employed to improve load capacity, reduce weight, and increase the longevity of worm screws. Additionally, advancements in material science and engineering are leading to the development of self-lubricating materials, which can minimize friction and improve efficiency by reducing the need for external lubrication.
  • Improved Thread Geometries: Innovations in thread geometries have focused on optimizing load distribution, reducing friction, and improving efficiency. Researchers and engineers are developing novel thread profiles and forms that enhance contact between the worm screw and the worm wheel. These designs help minimize backlash, increase load-carrying capacity, and improve overall system performance. Additionally, advancements in computer simulations and modeling techniques enable more accurate analysis and optimization of thread geometries for specific applications.
  • Surface Treatments and Coatings: Surface treatments and coatings are being applied to worm screws to enhance their performance and durability. For instance, advanced coatings such as diamond-like carbon (DLC) coatings or specialized lubricious coatings help reduce friction, improve wear resistance, and minimize the need for external lubrication. Surface treatments like nitriding or carburizing can improve hardness and provide resistance against abrasive wear, increasing the lifespan of worm screws.
  • Precision Manufacturing: Innovations in manufacturing processes and technologies have enabled the production of worm screws with higher precision and tighter tolerances. Advanced machining techniques, such as CNC grinding and high-precision gear hobbing, allow for the creation of worm screws with superior dimensional accuracy, improved surface finish, and better tooth profile control. These manufacturing advancements contribute to enhanced performance, reduced backlash, and increased overall system efficiency.
  • Computer-Aided Design and Simulation: The use of computer-aided design (CAD) software and simulation tools has revolutionized worm screw design and optimization. Engineers can now create virtual models, simulate the behavior of worm gear systems, and analyze various design parameters to optimize performance before physical prototypes are manufactured. This iterative design process helps reduce development time, minimize costs, and improve the final design and performance of worm screws.
  • Integration with Digitalization and Automation: The integration of worm gear systems with digitalization and automation technologies is another area of innovation. Worm screws are being designed to work seamlessly with sensor technologies, allowing for real-time monitoring of performance parameters such as temperature, vibration, and load. This data can be utilized for predictive maintenance, condition monitoring, and optimization of the overall system performance.

It’s important to note that the field of worm screw design and materials is continuously evolving, and new innovations are being introduced regularly. Keeping up with the latest research, advancements, and industry developments is crucial for engineers, designers, and manufacturers involved in worm gear system applications.

worm screw

What is a worm screw in mechanical engineering?

In mechanical engineering, a worm screw, also known as a worm gear screw or worm gear, is a type of gear mechanism used to transmit motion and power between non-parallel shafts. It consists of a spiral-shaped screw, called the worm, and a gear wheel, called the worm wheel or worm gear. The worm screw and worm wheel have helical teeth that mesh together to transfer rotational motion.

The worm screw typically has a single thread or multiple threads wrapped around its cylindrical body. The worm wheel, on the other hand, has teeth that are specially shaped to mesh with the worm screw. The orientation of the worm screw and worm wheel is such that the axes of rotation are perpendicular to each other. This configuration allows the worm screw to convert rotational motion along its axis into rotary motion perpendicular to its axis.

One of the defining characteristics of a worm screw is its high gear ratio. Due to the helical nature of the teeth, a worm screw can achieve a high reduction ratio in a single gear stage. This means that a small rotation of the worm screw can result in a substantial rotation of the worm wheel. The ratio of the number of teeth on the worm wheel to the number of threads on the worm screw determines the reduction ratio.

Worm screws have several advantages and applications in mechanical engineering:

  • High Reduction Ratio: As mentioned earlier, worm screws offer high gear ratios, making them suitable for applications that require significant speed reduction and torque multiplication. They are commonly used in applications where large gear reductions are needed, such as in conveyor systems, winches, and lifting equipment.
  • Self-Locking: A unique characteristic of worm screws is their self-locking property. The angle of the helical teeth creates a wedging effect that prevents the worm wheel from driving the worm screw. This self-locking feature allows worm screws to hold loads without the need for additional braking mechanisms, making them suitable for applications where holding positions or preventing back-driving is crucial, such as in elevators or lifting mechanisms.
  • Smooth and Quiet Operation: The helical teeth of the worm screw and worm wheel facilitate smooth and quiet operation. The gradual engagement and disengagement of the teeth minimize noise, vibration, and backlash, resulting in a more efficient and reliable gear mechanism.
  • Compact Design: Worm screws offer a compact design compared to other gear mechanisms. The perpendicular arrangement of the worm screw and worm wheel allows for a compact and space-saving installation, making them suitable for applications where size constraints are a consideration.
  • Reduction of Input Speed: Worm screws are commonly used to reduce the speed of the input shaft while increasing torque. This is advantageous in applications where slower, controlled motion is required, such as in industrial machinery, conveyors, and robotics.

It should be noted that worm screws also have some limitations, including lower efficiency compared to other gear mechanisms, higher friction due to sliding motion, and limited reverse operation capabilities. Therefore, careful consideration of the specific application requirements is necessary when deciding whether to use a worm screw in a mechanical system.

China Hot selling CHINAMFG High-Speed Planetary Roller Screw for Automotive Worm Gears (CHRC Series, Lead: 10mm, Shaft: 48mm) China Hot selling CHINAMFG High-Speed Planetary Roller Screw for Automotive Worm Gears (CHRC Series, Lead: 10mm, Shaft: 48mm)
editor by CX 2024-01-05

Tags: automotive screw | china gears | gears | gears gears gears | gears planetary | screw roller | screw screw | screw screw screw | screw worm | worm screw

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