Worm Reducer
Worm reducers are a type of gear reducer that uses a worm gear and a worm wheel to transmit power between two shafts. Worm gears are spiral-shaped gears that mesh with worm wheels, which are gear wheels with teeth that are perpendicular to the axis of the wheel.
Worm reducers are known for their high torque capacity, low noise levels, and smooth operation. They are also very efficient, with efficiencies of up to 98%. This makes them ideal for a wide range of applications, including:
- Industrial machinery
- Agricultural equipment
- Construction equipment
- Mining equipment
- Food processing equipment
- Material handling equipment
- Automated manufacturing equipment
- Robotics

Specification
Model | Motor Input Flange (circle) | Transmission Ratio | Power (kw) | Ratio (i) | Nominal Torque (Nm) | |||||||||||||||
PAM / IEC | Internal Dia. | Dis. Between Diagonal Screw Holes | External Dia. | Width of Key Slot | 5 | 7.5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 | 80 | 100 | ||||
N | M | P | E | Diamter of Input Shaft | ||||||||||||||||
NMRV25 | 56B14 | 50 | 65 | 80 | 3 | 9 | - | 9 | - | 0.06 | 7.5-60 | 2.6-14 | ||||||||
NMRV30 | 63B5 | 95 | 115 | 140 | 4 | 11 | - | 0.06-0.18 | 7.5-80 | 2.6-14 | ||||||||||
63B14 | 60 | 75 | 90 | |||||||||||||||||
56B5 | 80 | 100 | 120 | 3 | 9 | - | ||||||||||||||
56B14 | 50 | 65 | 80 | |||||||||||||||||
NMRV40 | 71B5 | 110 | 130 | 160 | 5 | 14 | - | 0.09-0.37 | 7.5-100 | 11-53 | ||||||||||
71B14 | 70 | 85 | 105 | |||||||||||||||||
63B5 | 95 | 115 | 140 | 4 | 11 | |||||||||||||||
63B14 | 60 | 75 | 90 | |||||||||||||||||
56B5 | 80 | 100 | 120 | 3 | - | 9 | ||||||||||||||
NMRV50 | 80B5 | 130 | 165 | 200 | 6 | 19 | - | 0.12-0.75 | 7.5-100 | 21-89 | ||||||||||
80B14 | 80 | 100 | 120 | |||||||||||||||||
71B5 | 110 | 130 | 160 | 5 | 14 | - | ||||||||||||||
71B14 | 70 | 85 | 105 | |||||||||||||||||
63B5 | 95 | 115 | 140 | 4 | - | 11 | ||||||||||||||
NMRV63 | 90B5 | 130 | 165 | 200 | 8 | 24 | - | 0.25-1.5 | 7.5-100 | 56-166 | ||||||||||
90B14 | 95 | 115 | 140 | |||||||||||||||||
80B5 | 130 | 165 | 200 | 6 | 19 | - | ||||||||||||||
80B14 | 80 | 100 | 120 | |||||||||||||||||
71B5 | 110 | 130 | 160 | 5 | - | 14 | ||||||||||||||
71B14 | 70 | 85 | 105 | |||||||||||||||||
NMRV75 | 100/112B5 | 180 | 215 | 250 | 8 | - | 28 | - | 0.55-4 | 7.5-100 | 90-269 | |||||||||
100/112B14 | 110 | 130 | 160 | |||||||||||||||||
90B5 | 130 | 165 | 200 | 8 | 24 | - | ||||||||||||||
90B14 | 95 | 115 | 140 | |||||||||||||||||
80B5 | 130 | 165 | 200 | 6 | - | 19 | ||||||||||||||
80B14 | 80 | 100 | 120 | |||||||||||||||||
71B5 | 110 | 130 | 160 | - | - | 14 | ||||||||||||||
NMRV90 | 100/112B5 | 180 | 215 | 250 | 8 | - | 28 | - | 0.55-4 | 7.5-100 | 101-458 | |||||||||
100/112B14 | 110 | 130 | 160 | |||||||||||||||||
90B5 | 130 | 165 | 200 | 8 | 24 | - | ||||||||||||||
90B14 | 95 | 115 | 140 | |||||||||||||||||
80B5 | 130 | 165 | 200 | 6 | - | 19 | ||||||||||||||
80B14 | 80 | 100 | 120 | |||||||||||||||||
NMRV110 | 132B5 | 230 | 265 | 300 | 10 | - | 38 | - | 1.1-7.5 | 7.5-100 | 242-660 | |||||||||
132B14 | 130 | 165 | 200 | - | ||||||||||||||||
100/112B5 | 180 | 215 | 250 | 8 | 28 | - | ||||||||||||||
90B5 | 130 | 165 | 200 | - | 24 | |||||||||||||||
90B14 | 95 | 115 | 140 | - | ||||||||||||||||
80B5 | 130 | 165 | 200 | - | 19 | |||||||||||||||
NMRV130 | 132B5 | 230 | 265 | 300 | 10 | - | 38 | - | 2.2-7.5 | 7.5-100 | 333-1596 | |||||||||
132B14 | 130 | 165 | 200 | - | ||||||||||||||||
100/112B5 | 180 | 215 | 250 | 8 | - | 28 | ||||||||||||||
90B5 | 130 | 165 | 200 | - | - | 24 | ||||||||||||||
90B14 | 95 | 115 | 140 | |||||||||||||||||
NMRV150 | 160B5 | 250 | 300 | 350 | 12 | - | 42 | - | 2.2-15 | 7.5-100 | 570-1760 | |||||||||
132B5 | 230 | 265 | 300 | 10 | - | 38 | - | |||||||||||||
132B14 | 130 | 165 | 200 | - | ||||||||||||||||
100/112B5 | 180 | 215 | 250 | 8 | - | 28 | ||||||||||||||
Selecting the Right Worm Reducer
When selecting a worm reducer, it is important to consider the following factors:
- Torque capacity: The worm reducer must have a torque capacity that is greater than or equal to the torque that is being transmitted.
- Speed ratio: The worm reducer must have the correct speed ratio to achieve the desired speed reduction or increase.
- Input and output shaft sizes: The worm reducer must have input and output shaft sizes that are compatible with the other components in the power transmission system.
- Mounting type: The worm reducer must have a mounting type that is compatible with the application.
- Service environment: The worm reducer must be made of materials that are suitable for the operating environment. For example, a worm reducer that will be used in a corrosive environment should be made of stainless steel.
Installation and Maintenance of Worm Reducers
Worm reducers are relatively easy to install and maintain. However, it is important to follow the manufacturer's instructions to ensure proper installation and operation.
Here are some general tips for installing and maintaining worm reducers:
- Make sure that the worm reducer is properly aligned with the input and output shafts.
- Use the correct type and size of lubricant.
- Inspect the worm reducer regularly for signs of wear or damage.
- Replace the worm reducer as needed.
Conclusion
Worm reducers are a versatile and reliable power transmission solution that is suitable for a wide range of applications. They offer high torque capacity, low noise levels, smooth operation, and high efficiency. When selecting a worm reducer, it is important to consider the torque capacity, speed ratio, input and output shaft sizes, mounting type, and service environment. Worm reducers are relatively easy to install and maintain, but it is important to follow the manufacturer's instructions to ensure proper installation and operation.
Additional Information
Here is some additional information about worm reducers that you may find helpful:
- Worm gear materials: Worm gears are typically made of hardened steel or bronze.
- Worm wheel materials: Worm wheels are typically made of cast iron, bronze, or nylon.
- Worm reducer lubrication: Worm reducers are typically lubricated with grease or oil.
- Worm reducer maintenance: Worm reducers should be inspected regularly for signs of wear or damage, and the lubricant should be changed according to the manufacturer's recommendations.
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