Product Description
KGG High Quality Planetary Roller Screws-CHRF 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
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 /* January 22, 2571 19:08:37 */!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 |
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| Screw Diameter: | 113.9mm |
| 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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How does the design of lead screws impact their performance in different environments?
The design of lead screws plays a crucial role in determining their performance in different environments. Lead screws are mechanical devices used to convert rotational motion into linear motion. They consist of a screw (also known as the lead screw or power screw) and a nut that engages with the screw’s threads. The performance of lead screws can be influenced by various design factors, including the thread profile, lead angle, material selection, and lubrication.
Thread Profile: The thread profile of a lead screw refers to the shape of the threads on the screw and nut. Common thread profiles include square, Acme, and ball screw. The choice of thread profile affects the efficiency, backlash, and load-carrying capacity of the lead screw. For example, ball screws generally offer higher efficiency and lower backlash compared to square or Acme threads, making them suitable for applications requiring high precision and efficiency.
Lead Angle: The lead angle of a lead screw is the angle between the helix and the axis of the screw. It determines the linear distance traveled by the nut for each revolution of the screw. Lead angle influences the mechanical advantage, speed, and load-carrying capacity of the lead screw. Steeper lead angles provide higher mechanical advantage but may reduce the speed and load capacity. Shallower lead angles, on the other hand, offer higher speed but lower mechanical advantage.
Material Selection: The choice of materials for lead screws depends on the specific environmental conditions and application requirements. Factors such as mechanical strength, wear resistance, corrosion resistance, and temperature resistance need to be considered. Common materials for lead screws include stainless steel, carbon steel, and bronze. Stainless steel is often preferred for its corrosion resistance, while bronze may be chosen for its self-lubricating properties.
Lubrication: Proper lubrication is essential for the smooth operation and longevity of lead screws. Lubricants reduce friction and wear between the screw and nut, improving efficiency and reducing the chances of seizing or galling. The selection of lubricants depends on the operating conditions, such as temperature, speed, and load. For high-temperature environments, specialized high-temperature lubricants may be required.
In different environments, the design considerations for lead screws may vary. For example:
- In high-temperature environments, the selection of materials with high-temperature resistance becomes critical to prevent premature failure or deformation of the lead screw.
- In corrosive environments, materials with good corrosion resistance, such as stainless steel or specialized coatings, should be chosen to protect the lead screw from chemical degradation.
- In applications where precision is crucial, such as CNC machines or robotics, lead screws with low backlash and high efficiency, such as ball screws, are often preferred.
In summary, the design of lead screws, including thread profile, lead angle, material selection, and lubrication, significantly impacts their performance in different environments. It is important to consider the specific requirements of the application and environmental conditions to choose the most suitable lead screw design for optimal performance and longevity.
Can you explain the impact of lead screws on the overall durability of mechanical systems?
Lead screws have a significant impact on the overall durability of mechanical systems. As essential components in many machines and mechanisms, lead screws play a crucial role in providing precise linear motion and transferring loads. Their design, quality, and maintenance directly influence the durability and reliability of the systems they are incorporated into. Here are some key factors highlighting the impact of lead screws on overall durability:
- Load-Carrying Capacity: Lead screws are responsible for transmitting axial loads between the rotating screw and the nut. The design and material selection of the lead screw determine its load-carrying capacity. Inadequate design or material choice can lead to premature wear, deformation, or failure under heavy loads, compromising the overall durability of the mechanical system.
- Backlash and Precision: Backlash refers to the play or clearance between the screw and nut in a lead screw system. Excessive backlash can result in reduced precision, inaccuracies in positioning, and decreased overall performance. Lead screws with low backlash, such as ball screws, are often preferred in applications that require high precision and repeatability. Minimizing backlash through proper design and maintenance enhances the durability and performance of the system.
- Wear and Friction: Lead screws are subject to wear and friction during operation. Continuous contact between the screw and nut can result in surface damage and increased friction, leading to accelerated wear. Adequate lubrication, regular maintenance, and proper material selection can help minimize wear and friction, extending the lifespan of the lead screw and improving the durability of the mechanical system.
- Mechanical Efficiency: The efficiency of a lead screw system influences its durability. Inefficient systems generate more heat due to friction, which can cause thermal expansion, accelerated wear, and reduced lifespan. By selecting lead screw designs with high mechanical efficiency, such as ball screws or optimized thread profiles, the overall durability of the mechanical system can be improved.
- Environmental Considerations: Lead screws operating in different environments face varying challenges that can impact their durability. Factors such as temperature extremes, exposure to moisture, chemicals, or abrasive contaminants can accelerate wear, corrosion, or degradation of the lead screw. Proper material selection, protective coatings, sealing, and regular maintenance practices can mitigate the environmental impact and enhance the overall durability of the mechanical system.
- Maintenance and Service Life: Adequate maintenance practices, including cleaning, lubrication, inspection, and adjustment, are essential for preserving the durability of lead screws and the mechanical systems they are part of. Regular maintenance helps identify and address issues early, preventing further damage and extending the service life of the system.
In conclusion, lead screws have a significant impact on the overall durability of mechanical systems. Their load-carrying capacity, precision, wear characteristics, mechanical efficiency, environmental resistance, and proper maintenance practices all contribute to the durability, reliability, and performance of the system. By considering these factors and selecting suitable lead screw designs, materials, and maintenance strategies, the overall durability of mechanical systems can be significantly improved.
What is a lead screw, and how is it used in mechanical applications?
A lead screw is a type of threaded shaft used in mechanical applications to convert rotary motion into linear motion or vice versa. It consists of a screw with a helical thread and a matching nut with corresponding threads. The lead screw and nut are designed in such a way that when the screw is rotated, it moves the nut along its length, resulting in linear motion.
The primary purpose of a lead screw is to transmit motion and force between rotating and linearly translating components in a mechanical system. It offers precise control over linear movement and is commonly used in various applications, including but not limited to:
- Precision Positioning: Lead screws are widely used in applications that require precise positioning, such as CNC machines, 3D printers, and robotic systems. By coupling the lead screw to a motor or handwheel, the rotational motion can be translated into precise linear movement, allowing for accurate positioning of components or tools.
- Actuation and Adjustment: Lead screws are often utilized for actuation and adjustment mechanisms in equipment and machinery. They can be employed to raise or lower platforms, adjust the height of work surfaces, control the position of tool heads, or move components along a linear path. Lead screws provide a straightforward and reliable means of achieving controlled linear motion in these applications.
- Load Transfer: Lead screws can also serve as load-bearing elements in mechanical systems. They can transmit axial loads and handle tension or compression forces, making them suitable for applications that require smooth and controlled lifting or lowering of heavy loads. In such cases, the lead screw is often combined with thrust bearings or other supporting elements to handle the applied loads.
- Manual and Handwheel Operations: Lead screws are commonly used in manual and handwheel-operated systems. By incorporating a handle or handwheel, the user can rotate the lead screw directly, enabling manual adjustment or movement of components. This is frequently seen in applications like manual stage positioning, height adjustment mechanisms, or manual clamping systems.
- Power Transmission: In some cases, lead screws can be employed for power transmission purposes. While they are not as efficient as other transmission methods like gears or belts, lead screws can be used to transfer torque between rotating shafts and linearly translating components. This is often seen in applications where the primary focus is on converting rotational motion into linear motion rather than optimizing power transmission efficiency.
Lead screws come in various designs, including single-start and multi-start threads, different thread pitches, and varying lead screw and nut materials. The selection of a lead screw depends on the specific requirements of the application, such as load capacity, desired speed, precision, and environmental conditions. Factors like backlash, efficiency, and maintenance requirements should also be considered when choosing a lead screw for a particular mechanical application.
editor by CX 2024-03-25