Kgg High Precision Planetary Roller Screw (RSI Series, Lead: 5mm, Shaft: 48mm)

Product Description

Product Description

KGG High Quality Reverse Planetary Roller Screw - RSI Series

Our Reverse Planetary Roller Screw - RSI Series delivers high-precision linear motion for demanding applications in aerospace, robotics, and precision automation, etc. Our innovative reverse planetary design provides superior load capacity, exceptional positioning accuracy, and excellent energy efficiency. Built for durability, it ensures reliable performance in high-load, high-speed, and harsh operational environments.

Specification

Advantages

Load Capacity Life
The RSI Series Reverse Planetary Roller Screw delivers exceptional load performance by fundamentally redefining the load transmission path. Unlike standard designs, its inverted architecture positions the threaded rollers in an externally engaging configuration, significantly expanding the effective load-bearing contact area. This innovative layout allows forces to be distributed across a greater number of stress-optimized contact lines, dramatically enhancing both static and dynamic load ratings. 
 
Speed and Acceleration
Engineered for superior dynamic response, the RSI Series excels in high-speed and high-acceleration scenarios. Its reverse planetary geometry minimizes inertial losses within the nut assembly, enabling smoother roller circulation and higher permissible rotational speeds—often reaching or surpassing 3,500 rpm. The lead is derived directly from the precise pitch geometry, allowing for ultra-fine leads under 0.5mm without compromising structural integrity or load capacity. Furthermore, the lead can be customized as integer, fractional, or non-standard values (e.g., 2.89mm or 4.15mm per revolution) without necessitating changes to the screw shaft or nut profile, eliminating the need for external reduction gearing and enhancing system responsiveness and accuracy.

Stiffness and Strength

The RSI design achieves remarkable mechanical stiffness and strength through its multi-line, reverse-engagement contact topology. By inverting the roller arrangement, the system maximizes the number of load-carrying contact lines between components, resulting in substantially increased axial and torsional rigidity. This configuration provides exceptional resistance to deformation under heavy loads, shock, and vibration, ensuring precise positioning stability and repeatability. 
 
Application
The RSI Reverse Planetary Roller Screw Series is deployed in advanced industries that demand compact design, high power density, and reliable performance under extreme conditions. Key applications include high-dynamics industrial robotics, aerospace flight control actuators, satellite deployment mechanisms,  defense such as turret drives and missile guidance systems, as well as precision machine tools and high-speed CNC systems.

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.

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

Ball Screw
Planetary Roller Screw
GSSD Stepper Motor
PT Variable Pitch Slide
Gearbox
Linear Actuator

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.