NRV
Technical Specifications
The NRV series is our standard worm gear reducer, featuring a shaft extension input structure for easy connection to various power sources via couplings or pulleys. As a fundamental core component for various transmission systems, this series is widely used in different industrial fields for its efficiency, stability, and durability.
Based on shaft extension input, input speed 1400 r/min.
Performance Parameters
| Model | Input Power (kW) | Output Speed (r/min) | Output Torque (N·m) | Ratio |
|---|---|---|---|---|
| NRV30 | 0.4 | 186.7 | 18 | 7.5 |
| NRV40 | 0.9 | 186.7 | 40 | 7.5 |
| NRV50 | 1.6 | 186.7 | 71 | 7.5 |
| NRV63 | 2.8 | 186.7 | 128 | 7.5 |
| NRV75 | 4.1 | 186.7 | 185 | 7.5 |
| NRV90 | 6.3 | 186.7 | 290 | 7.5 |
| NRV110 | 12 | 186.7 | 552 | 7.5 |
| NRV130 | 16.1 | 186.7 | 750 | 7.5 |
| NRV150 | 25.8 | 186.7 | 1200 | 7.5 |
* This is a partial list. For complete parameters, please refer to the product catalog or contact us.
Installation & Maintenance
Key points to ensure reliable operation and service life.
Installation Points
- The reducer must be installed on a flat, solid base with tight, anti-vibration anchor bolts.
- Shafts of the prime mover, reducer, and working machine must be accurately aligned after installation.
- When mounting sprockets or gears, position them as close to the bearings as possible to reduce bending stress.
- If the motor is oversized, a support structure should be provided.
Usage Notes
- Before use, check all specifications. The worm input speed should not exceed 1500 r/min.
- Apply load gradually upon startup; do not start at full load.
- The maximum allowable oil temperature is 95°C. Stop and inspect if this is exceeded.
- If the reducer has been stored for more than 4–6 months, it’s recommended to replace the oil seals.
Lubrication & Maintenance
- Models 25–90: Shipped with ISO VG320 synthetic oil, no need to add. Change oil after the first 5000 hours, then every 6000 hours.
- Models 110–150: Shipped with ISO VG460 mineral oil. Change oil after the first 400 hours, then every 4000 hours.
Model Explanation
Quick guide to understanding the NRV designation.
To better understand our product models, here is a brief explanation of the NRV designation:
NRV Represents a worm gear reducer with an input shaft. This is a basic structure connected to the prime mover via a shaft extension, offering high versatility as a core unit for various transmission systems.
For example, the model NRV063 refers to a worm gear reducer with a center distance of 63 mm and a standard input shaft.