A speed reducer is a gear system that connects a motor to a driven load. It reduces the motor’s output speed and increases the torque output.
🏭 Nidec Speed Reducer Types
Nidec (including Nidec-Shimpo, a part of the Nidec group) produces various types of speed reducers:
1. Planetary Gear Reducers
Design: Consist of a central sun gear, multiple planet gears, and an outer ring gear.
Benefits:
High torque-to-size ratio
Very compact
Excellent for precision applications (like robotics or servo motors)
High efficiency and low backlash options
Popular Models: VR series, VRS series (low backlash), VRL series (economical)
2. Right-Angle Gear Reducers
Design: Typically use bevel gears or worm gears to change the direction of rotation by 90 degrees.
Applications: Where space constraints require a compact, angular setup.
Variants: Worm gear reducers, hypoid reducers
3. Cycloidal Gear Reducers
Design: Use a cycloidal disc to transfer motion, not standard gears.
Advantages:
Shock resistance
High torque output
Compact footprint
Common Use: Industrial automation, robotics
4. Inline Helical Gear Reducers
More traditional gear setup
Quiet, durable, used in conveyors and general industrial machinery
⚙️ Key Specifications
When selecting a Nidec speed reducer, key factors include:
Gear Ratio (e.g. 5:1, 10:1, 100:1)
Torque Rating (Nm or lb-ft)
Backlash (for precision systems; measured in arc-minutes)
Efficiency
Mounting Type (flange, foot, shaft input/output)
Input Type (motor flange compatibility, hollow shaft, etc.)
🔩 Applications
Nidec speed reducers are used in:
Robotics and Automation: Compact planetary gearboxes for high-precision motion
CNC Machines: Accurate position control
Conveyors and Material Handling
Packaging Equipment
Medical Devices: Imaging systems, surgical robots
Renewable Energy: Solar trackers, wind turbines
🔍 Example: Nidec-Shimpo VR Series Planetary Gearbox
Backlash: <3 arc-min (precision)
Efficiency: ~97%
Output Torque: Varies from 20 Nm to 2000+ Nm
Frame Sizes: Compact (40 mm to 180 mm)
Motor Compatibility: Adaptable to most servo motors
🧰 Maintenance Tips
Regular lubrication check (especially for worm gear types)
Monitor for noise, vibration
Ensure proper alignment with motor shaft
Periodic backlash testing in precision applications
