Precision Planetary Gearbox
MB/MBR High-Precision Planetary Gearbox — Frame 042–220
Output Torque 14 – 2000 Nm · Backlash ≤1 – 9 arcmin · For Servo Motor Applications
The MB/MBR series is a high-precision planetary gearbox designed to mount directly onto a servo motor, delivering low backlash and high torsional rigidity for CNC machinery, robotics and automated positioning equipment. MB is the standard inline configuration; MBR extends the reduction ratio range further for applications needing extra-low output speed. Available across 7 frame sizes (042–220mm) with rated output torque from 14Nm to 2000Nm, backlash grades down to ≤1 arcmin, and efficiency up to 97% per stage. Maintenance-free synthetic grease lubrication and an IP65-rated housing support continuous-duty operation in industrial environments.
Output Torque14 – 2000 Nm
Frame Size Range042 – 220 mm
EfficiencyUp to 97% / stage
Product Features
Key design and engineering features of the MB/MBR precision planetary gearbox
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Low backlash down to ≤1 arcmin (P0 grade) for precise, repeatable positioning
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High torsional rigidity and radial/axial load capacity for direct servo motor mounting
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Up to 97% efficiency per stage — minimal energy loss in the drive train
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7 frame sizes (042–220mm) covering output torque from 14Nm to 2000Nm
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Maintenance-free synthetic grease lubrication, rated for 20,000 hours service life
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IP65-rated housing, mountable in any orientation, operating range -10°C to 90°C
Technical Specifications
Full parameter data and dimensional reference
⚙ MB Standard vs MBR Configuration
⚙reducer-6-config.jpg
📐 Frame Size Comparison
📐reducer-6-dim.jpg
| Parameter | Specification |
|---|
| Series | MB (Standard) / MBR (Extended Ratio Range) |
| Reducer Type | High-Precision Planetary Gearbox |
| Frame Size Range | 042, 060, 090, 115, 142, 180, 220 (mm) |
| Rated Output Torque | 14 Nm – 2000 Nm |
| Reduction Ratio — MB | Single stage: 3/4/5/6/7/8/10 Double stage: 12–100 |
| Reduction Ratio — MBR | Single stage: 3–20 Double stage: 12–200 |
| Backlash — MB | Single stage ≤1/3/5 arcmin Double stage ≤3/5/7 arcmin |
| Backlash — MBR | Single stage ≤2/4/6 arcmin Double stage ≤4/7/9 arcmin |
| Transmission Efficiency | ~97% (single stage) / ~94% (double stage) |
| Lubrication | Maintenance-free synthetic grease |
| Protection Rating | IP65 |
| Operating Temperature | -10°C to 90°C |
| Service Life | 20,000 hours |
| Mounting Orientation | Any orientation |
* Radial/axial load capacity and full mounting-hole dimensional drawings vary by frame size — available on request to match your exact servo motor model.
Applications
Typical industries and equipment where the MB/MBR planetary gearbox excels
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Robotics & Automation
Robotic arms, pick-and-place systems and automated assembly requiring precise, repeatable positioning.
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CNC & Machine Tools
CNC rotary axes, indexing tables and machine tool feed drives needing low backlash and high rigidity.
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Precision Positioning Equipment
Antenna positioners, camera gimbals and inspection equipment requiring smooth, accurate motion control.
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Packaging & Labeling Machinery
Servo-driven packaging, labeling and printing equipment needing high-speed, high-accuracy indexing.
Advantages
Why engineers and buyers choose CoreMotor Tech for the MB/MBR planetary gearbox
01
Flexible order quantities and competitive wholesale pricing — OEM/ODM bulk pricing available
02
Export documentation and shipping coordination provided
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7 frame sizes and multiple backlash grades available for fast servo-motor matching
04
English-speaking sales and technical support via WhatsApp
Frequently Asked Questions
Common questions about the MB/MBR precision planetary gearbox
What is the difference between MB and MBR?+
MB is the standard configuration with reduction ratios up to 10:1 (single stage) or 100:1 (double stage). MBR extends this range up to 20:1 (single stage) or 200:1 (double stage) for applications needing extra-low output speed, with slightly wider backlash tolerance. Tell us your required ratio and we'll recommend the right one.
What does the backlash grade (P0/P1/P2) mean, and which one do I need?+
Backlash is the amount of "play" in the output shaft when reversing direction, measured in arc-minutes — lower means more precise. P0 (≤1 arcmin) suits high-precision applications like CNC and robotics; P1/P2 grades are more economical and suit less demanding positioning tasks. Tell us your application and required accuracy and we'll recommend the right grade.
Can this gearbox be mounted directly to my servo motor?+
Yes. The MB/MBR series is designed with a standard input flange and coupling to mount directly onto common servo motor frame sizes. Tell us your servo motor brand and model (or its flange/shaft dimensions) and we will confirm compatibility or recommend an adapter.
Is OEM/custom specification available?+
Yes. We support custom input adapters, output shaft configuration, backlash grade and branding with flexible MOQ. Contact us via WhatsApp for OEM pricing and exact dimensional drawings for your frame size.
