Kgg High Grade Planetary Roller Screws for Chemical Industry (RS Series, 2103)
Product Details
| Customization: | Available |
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| Flange: | With Flange |
| Nut Number: | Single |
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Basic Info.
- Model NO.
- RS 21*3
- Nut Type
- End Cap Type / Elbow Type / Circulator Type
- Precision
- C0, 1, 2, 3, 5, 7, 10
- Rows Number
- 3-Row
- Screw Diameter
- 21.21mm
- Type
- Roller Cyclic/Non-Cyclic
- Number of Threads
- 5
- Shaft Dia.
- 21mm
- Lead
- 3mm
- External Diameter
- 21.21mm
- Thread Bottom Diameter
- 20.72mm
- Dynamic Load Capacity
- 39.9kn
- Static Load Capacity
- 87.7kn
- Anti-Rust Treatment
- Anti-Rust Oil
- Transport Package
- PVC Bag, Wooden Box, Full Container Export
- Specification
- Cold Rolled/Grinding
- Trademark
- KGG
- Origin
- Shanghai
- HS Code
- 8483401000
- Production Capacity
- 15000
Packaging & Delivery
- Package Size
- 31.00cm * 20.00cm * 11.00cm
- Package Gross Weight
- 0.500kg
Product Description
Product Description
KGG High Quality Standard Planetary Roller Screw - RS Series
Our Standard Planetary Roller Screw - RS Series delivers high-precision linear motion for demanding applications in aerospace, automation, and CNC machining, etc. Our proven planetary roller screw design provides superior load capacity, exceptional accuracy, and excellent energy efficiency. Built for longevity, it ensures reliable performance in high-load, high-speed, and harsh environments.
Specification
Advantages
Load Capacity Life
The RS Series Standard Planetary Roller Screw sets the benchmark for high-load precision transmission by leveraging a multi-roller planetary design that distributes forces across numerous threaded contact lines. This configuration replaces conventional ball-to-raceway point contact with continuous line engagement, substantially increasing both dynamic and static load ratings. In accordance with Hertzian stress theory, the RS series delivers up to three times the static load capacity and approximately 1.5 times the operational lifespan of equivalent ball screws. The enhanced load distribution also improves impact resistance and reduces wear, ensuring reliable long-term performance in demanding applications.
Speed and Acceleration
Designed for high dynamic performance, the RS Series supports exceptional rotational speeds and acceleration capabilities. The planetary roller mechanism minimizes inertial resistance and enables smooth, high-velocity operation—often exceeding 3,000 rpm with acceleration levels reaching up to 3g. Unlike ball screws constrained by recirculating ball size, the RS lead can be specified as integer, fractional, or application-specific values (e.g., 2.5mm or 6.35mm per revolution), eliminating the need for external gearing and enhancing motion control efficiency.
The RS Series Standard Planetary Roller Screw sets the benchmark for high-load precision transmission by leveraging a multi-roller planetary design that distributes forces across numerous threaded contact lines. This configuration replaces conventional ball-to-raceway point contact with continuous line engagement, substantially increasing both dynamic and static load ratings. In accordance with Hertzian stress theory, the RS series delivers up to three times the static load capacity and approximately 1.5 times the operational lifespan of equivalent ball screws. The enhanced load distribution also improves impact resistance and reduces wear, ensuring reliable long-term performance in demanding applications.
Speed and Acceleration
Designed for high dynamic performance, the RS Series supports exceptional rotational speeds and acceleration capabilities. The planetary roller mechanism minimizes inertial resistance and enables smooth, high-velocity operation—often exceeding 3,000 rpm with acceleration levels reaching up to 3g. Unlike ball screws constrained by recirculating ball size, the RS lead can be specified as integer, fractional, or application-specific values (e.g., 2.5mm or 6.35mm per revolution), eliminating the need for external gearing and enhancing motion control efficiency.
Stiffness and Strength
The RS Series achieves superior mechanical stiffness through its multi-line contact architecture, which provides high axial and torsional rigidity. The simultaneous engagement of multiple threaded rollers along the screw axis ensures uniform load sharing, significantly reducing elastic deformation and improving resistance to shock and vibration. This results in enhanced positioning accuracy, repeatability, and system stability, even under variable or high-load conditions. The robust construction further increases durability, making the RS series ideal for precision systems where structural integrity is critical.
Application
The RS Standard Planetary Roller Screw is widely utilized across industries requiring high precision, high load capacity, and reliable motion control. Key applications include CNC machining centers, multi-axis robotics, aerospace actuation systems (flight controls, landing gear), defense equipment (turret drives, missile launchers), and precision injection molding machines.
Application
The RS Standard Planetary Roller Screw is widely utilized across industries requiring high precision, high load capacity, and reliable motion control. Key applications include CNC machining centers, multi-axis robotics, aerospace actuation systems (flight controls, landing gear), defense equipment (turret drives, missile launchers), and precision injection molding machines.
Drawings & Dimensions
Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry.
Our engineering team can provide tailored designs to meet specific project requirements.
Our engineering team can provide tailored designs to meet specific project requirements.
Factory Detailed Processing Photos
Finished Product Photos
Company Profile
Shanghai KGG Robots Co., Ltd.
Shanghai KGG Robotos Co., Ltd. is a leading Chinese manufacturer of construction equipment with over 16 years of expertise. Certified with ISO 9001, ISO 14001, and IATF 16949, we export to 30+ countries, offering reliable machinery backed by R&D innovation and strict quality control.
Why Choose Us?
Our Main Products
Self-branded
OEM/ODM capabilities
High repeat buyers choice
Customization from designs
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
OEM/ODM capabilities
High repeat buyers choice
Customization from designs
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
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Certifications
FAQ
Q: Why choose KGG China?
A: Over the past 17 years, KGG has always insisted that "products and services" start from Japanese industry standards, taking Taiwan 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.
Q: What is your main products?
A: 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: Shanghai 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.
Q: How to Custom-made (OEM/ODM)?
A: 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.
Q: When can I get the quotation?
A: 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.
Q: How can I get a sample to check the quality?
A: After confirmation of our quoted price, you can place the sample order. The sample will be started after you sign back our detailed technical file.
Q: What's your payment terms?
A: Our payment terms is 30% deposit,balance 70% before shipment.
A: Over the past 17 years, KGG has always insisted that "products and services" start from Japanese industry standards, taking Taiwan 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.
Q: What is your main products?
A: 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: Shanghai 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.
Q: How to Custom-made (OEM/ODM)?
A: 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.
Q: When can I get the quotation?
A: 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.
Q: How can I get a sample to check the quality?
A: After confirmation of our quoted price, you can place the sample order. The sample will be started after you sign back our detailed technical file.
Q: What's your payment terms?
A: Our payment terms is 30% deposit,balance 70% before shipment.
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