Product No. : 2016119195622
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NMRV Worm Gear Speed Reducer

The NMRV worm gear speed reducer is made of aluminum. It's often employed with the working conditions of low power and light load. But it features of small volume and low noise.

Technical Parameters 
1. Power: 0.18-15 kw
2. Speed Ratio: 7-100
3. Output Rotational Speed: 14.5-207 rpm
4. Output Torque: 1.5-118 N.m

he shell of the NMRV worm gear speed reducer is casted with high quality aluminum alloy, which has the features of light weight and rust resistance. With the shell processed with shot blasting firstly and then special anti-corrosion treatment, the worm gear speed reducer is resistant to organic solvent such as gasoline and xylene. After being treated with phosphating and then painted with blue or silver-white paint, it has a beautiful and unique external appearance. The worm of the device keeps the thickness of carburized case of 0.3mm to 0.5mm after it being treated with carburization, quenching and fine grinding. The turbo of the device is made of wearable tin bronze, which can keep a service life up to 10 years under the condition of normal operation. With the features of steady transmission and low noise, the NMRV worm gear speed reducer can work continuously in a long period with poor environment.

The users should know that don't mount the NMRV worm gear speed reducer vertically as much as possible if the space is large enough. Or the added lubricating oil is needed much more than horizontally mounting the device, which may lead to heating and oil leakage easily to the device.

Detail Description

1) Small size, compact, lightweight, and saves space for mounting

2) Runs steadily with low noise, high reliability and high efficiency

3) High quality aluminum alloy, elegant appearance, efficient heat radiation,

high carrying ability

4) Installed in multiple surfaces, hollow output shaft, various input and output types, conjoins with other transmission machinery easily

5) Specification: RV25~185 eleven type totally

6) Input power: 0.04~22kW (4 poles motor)

7) Output torque: 4~2320Nm

8) Transmission ratio: 5:1~100:1



Worm gearbox Materials:

(1) NMRV025-NMRV090: Aluminium alloy housing

(2) NMRV110-150: Cast iron housing

(3) Bearing: NSK bearing & Homemade bearing

(4) Lubricant: Synthetic & Mineral

(5) The material of the worm mandrel is HT250, and the worm ring gear is ZQSn10-1.

(6)  With high quality homemade bearings, assembled NAK oil seals & filled with high quality lubricant.


Type: NMRV 030-150 worm gearbox
Model: NMRV030-150
Ratio: 7.5,10,15,20,25,30,40,50,60,80,110
Color: Blue / Silver White
Material: Housing-Casting iron-HT200# / Aluminium
Worm Gear- Cooper-10-3 #
Worm-20CrMnTi with carburizing and quenching, surface hardness is 56-62HRC
Shaft-chromium steel-45#
Packing: Paper carton,Plywood box / per set(With foam board inside)
Bearing: Brand "HRE" Bearing
Seal: NAK Seal from TAIWAN
Warranty: 1 year
Input Power: 0.55kw,0.75kw,1.1kw,1.5kw,2.2kw,4kw,5.5kw,7.5kw
Usages: In industrial machine: Food stuff,Ceramics,chemical, aswell as packing, printing,  dyeing,woodworking, glass and plastics…..
IEC Flange: 80B5,90B5,100B5,112B5,132B5.....
Lubricant: Synthetic & Mineral



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