Kgg Compact Design Differential Planetary Roller Screw (RSD Series)

Product Description

Product Description

KGG High Quality Differential Planetary Roller Screw - RSD Series

Our Differential Planetary Roller Screw - RSD Series delivers ultra-high-precision linear motion for demanding applications in aerospace positioning, semiconductor manufacturing, and precision metrology, etc. Our advanced differential planetary roller screw design provides superior load capacity, exceptional positioning accuracy, and excellent motion smoothness. Built for extreme precision applications, it ensures reliable performance in ultra-high-load, high-speed, and vibration-sensitive environments.

Specification

Advantages

Load Capacity Life
The RSD Series Differential Planetary Roller Screw excels in offering superior dynamic and static load ratings compared to conventional ball screws. By utilizing threaded rollers instead of balls, the load is distributed across multiple contact lines, significantly enhancing impact resistance and load-bearing capacity. Based on Hertz contact theory, the RSD series can withstand up to three times the static load and achieve approximately 1.5 times the operational lifespan of equivalent ball screws, making it ideal for high-demand applications.
 
Speed and Acceleration
The RSD Differential Planetary Roller Screws are engineered to achieve superior high-speed performance and rapid acceleration, excelling in applications where dynamic response is critical. Unlike traditional ball screws, which are constrained by ball recirculation limits and diameter-related lead restrictions, the RSD design leverages a planetary threaded roller mechanism. The lead of an RSD screw is derived directly from the pitch geometry, allowing for extremely fine resolutions below 0.5mm, while also supporting larger leads when needed, all within a single-stage assembly.

Stiffness and Strength

With multiple continuous contact lines between rollers and screw threads, the RSD series delivers exceptional rigidity and resistance to deformation under heavy loads. This design enhances overall system stiffness, reduces deflection, and improves positioning accuracy—critical attributes for precision machinery and high-load automation systems.
 
Application
The RSD Differential Planetary Roller Screw is widely used in high-precision and heavy-duty fields such as CNC machine tools, industrial robotics, aviation (aircraft and helicopter controls), aerospace (satellite mechanisms and rocket actuators), and defense systems (turrets, missile launchers, and naval equipment). It is also employed in precision injection molding, medical devices, optical instruments, servo-electric cylinders, and specialized industrial machinery where reliability, accuracy, and durability are paramount.

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.