RM Right-angle Hollow Rotating Platform

Product Overview

The RM right angle hollow rotating platform is an advanced rotary positioning mechanism engineered for high-precision automation environments that require stable rotation, exceptional torque output, and repeatable accuracy. Designed with a cross-roller bearing structure and a precision cam mechanism, the RM platform delivers zero-backlash rotational performance, making it especially suitable for applications where consistent bi-directional motion and high rigidity are essential.

Thanks to its integrated right-angle structure, the RM right angle hollow rotating platform allows direct motor mounting in compact spaces, providing more design flexibility for automation engineers. The hollow-shaft structure supports cable routing, pneumatic tubing, sensor wiring, and other utilities through the center of the rotating platform, ensuring smooth equipment integration.

Each RM model—RM130-L1, RM180-L1, RM225-L1, RM260-L1—is engineered to provide stable load capacity, high precision, and uninterrupted operation. Performance characteristics such as positioning accuracy ≤1.5 arc-min, high repeatability, allowable moment of inertia, and excellent torsional rigidity meet the demands of modern automation and robotic systems.

The RM right angle hollow rotating platform follows engineering principles aligned with internationally recognized industrial motion standards. For additional technical background, users may refer to resources such as the ISO 230-2 standard for machine tool accuracy or the National Institute of Standards and Technology (NIST) reference materials on motion accuracy. These authoritative sources help engineers better understand how precision rotary motion systems relate to overall machine accuracy.

Key Features

  • Cross-Roller Bearing for Extreme Stability
    The integrated cross-roller bearing offers exceptional rigidity and stability, allowing the platform to sustain heavy axial, radial, and moment loads. This structure ensures smooth rotation even during rapid directional changes.
  • Zero-Backlash Mechanism
    The cam-curve mechanism operates in a constant preload state, fully eliminating backlash. This ensures perfect motion performance even when reversing direction or performing highly repetitive positioning tasks.
  • High Positioning Accuracy & Repeatability
    Positioning accuracy: ≤1.5 arc-min (≤2 arc-min for larger models); Repetitive positioning accuracy: ≤30 arc-sec; This level of precision is ideal for CNC indexing, pick-and-place automation, laser processing, and semiconductor positioning systems.
  • Hollow-Shaft Design for Cable Passage
    The through-hole design allows cables, fiber optics, pneumatic lines, and power wires to pass through the rotating center, providing a clean and efficient equipment layout.
  • Strong Load Capacity
    Axial load: Up to 29,600 N; Radial load: Up to 29,600 N; Moment load: Up to 760 Nm. This RM right angle hollow rotating platform ensures safe and stable operation under demanding industrial conditions.
  • Right-Angle Compact Motor Mounting
    Compatible with servo motors and stepper motors from major manufacturers, supporting power ranges from 200W to 5000W, depending on the model.
  • Long Lifespan with Minimal Maintenance
    The RM right angle hollow rotating platform uses long-term lubrication and high-durability materials to extend service life to: ≥20,000h intermittent operation. For more engineering reference on lubrication principles, users can consult the American Society of Mechanical Engineers (ASME) tribology section.

Technical Information

ModelUnitRM130-L1 (Reduction Ratio: 15/21/30/60)RM180-L1 (Reduction Ratio: 15/21/30/50)RM225-L1 (Reduction Ratio: 15/21/30/50)RM260-L1 (Reduction Ratio: 15/21/30/50)
Bearing Structure–Cross Roller BearingCross Roller BearingCross Roller BearingCross Roller Bearing
Reduction Ratioi15 / 21 / 30 / 6015 / 21 / 30 / 5015 / 21 / 30 / 5015 / 21 / 30 / 50
Rated Output TorqueN·m150 / 150 / 150 / 110470 / 470 / 470 / 3151350 / 1350 / 1350 / 9502950 / 2950 / 2950 / 1950
Max Output TorqueN·m3×Rated Output Torque3×Rated Output Torque3×Rated Output Torque3×Rated Output Torque
Positioning Accuracyarc-min≤1.5≤1.5≤1.5≤2
Repeat Positioning Accuracyarc-sec≤30≤30≤30≤30
Allowable Disk Speedrpm200 (Intermittent Operation)200 (Intermittent Operation)200 (Intermittent Operation)200 (Intermittent Operation)
Adapt to Servo MotorW200–400750–15001000–30002000–5000
Suitable for Stepping Motor–57 Stepper86 Stepper130/150 Stepper130/150 Stepper
Allowable Axial LoadN7300135001960029600
Allowable Radial LoadN7300135001960029600
Design Loadkg702304801000
Allowable Moment of InertiaN·m50110220750
Torsional RigidityN·m/arcmin254580175
Overturning MomentN·m520142026306300
Accuracy Lifeh20000 (Intermittent Operation)20000 (Intermittent Operation)20000 (Intermittent Operation)20000 (Intermittent Operation)
Protection LevelIPIP55IP55IP55IP55
Lubrication Method–Long-term LubricationLong-term LubricationLong-term LubricationLong-term Lubrication
Installation Method–ArbitraryArbitraryArbitraryArbitrary
Concentricity of Rotating Platformmm≤0.01≤0.01≤0.01≤0.01
Parallelism of Rotating Platformmm≤0.01≤0.01≤0.01≤0.01
Transmission Efficiency%95959595
NoisedB≤57≤63≤67≤67
Weightkg7173646
RM Right-angle Hollow Rotating Platform Dimension

RM Right-Angle Hollow Rotating Platform Brochure (PDF)

RM Series Technical Specifications Sheet (PDF)

RM130 / RM180 / RM225 / RM260 Dimension Drawings (DWG / PDF)

3D Models (STEP / IGES)

Motor-Flange Matching Guide (PDF)

Installation & Mounting Manual (PDF)

Applications

  • Robotics & Automated Assembly: Ensures precise orientation control for robot arms, end-of-arm tooling (EOAT), servo grippers, and multi-axis robotic systems.
  • CNC Machinery & Indexing Equipment: Provides accurate indexing for milling, drilling, rotary tables, circular cutting, and multi-station machining systems.
  • Laser Processing Systems: Supports stable motion required for laser engraving, marking, welding, and high-accuracy cutting.
  • Semiconductor & Electronics Manufacturing: Ideal for wafer handling, PCB positioning, alignment platforms, and micro-assembly tasks requiring ultra-low backlash.
  • Packaging Machinery: Assures consistent product rotation, cartoning, and inspection processes.
  • Automated Optical Inspection (AOI): Delivers micro-precision rotation for imaging, scanning, and part measurement. Authoritative engineering references for motion systems used in robotics can be found via IEEE Robotics & Automation Society publications.

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