NMRV-NRV Worm Gear Speed Reduction Unit


RV series worm gear speed reducers:

size:025,030,040,050,063,075,090,110,130,150(center to center spacing)

speed ratio:5,7.5,10,15,20,25,30,40,50,60,80,100


high quality Tn bronze worm wheel

exported NSk bearings

high quality synthetic lubricant oil


1,light weight and small size can save place for mounting.

2.suitable for omnibearing installation,efficient radiator.high carrying ability

3.run steadly and low noise,high reliability and large speed ratio rang.

4.strongad aptability,big load capacity,and long operating life

NMRV025-150 is made by Nayuan Transmission Machinery has many advantages compared with the speed reducer made by other company. Our company worm gearbox available in a vast range of sizes and ratios for dependable cost effective solutions. Nayuan Transmission adopts high quality aluminum alloy die casting box to manufacture worm gear reducer to ensure a long reliable working life. Our worm gear speed reducer features in light weight, good appearance, compact structure and rust-proof. Nayuan can provide worm gear speed reducer with various reduction ratios for the customers to choose.

Structure Features

Direct factory provide gearbox motor/ transmission gearbox/ mechanical gearbox

    1. Made of high quality aluminum alloy, light in weight and non-rusting

    2. Large in output torque

    3. Smooth in running and low in noise, can work long time in dreadful conditions

    4. High in radiating efficiency

    5. Good looking in appearance, durable in service life and small in volume

    6. Suitable for Omnibearing installation

Gearbox Materials

Direct factory provide gearbox motor/ transmission gearbox/ mechanical gearbox

    1. Housing: die-cast aluminum alloy (Housing size: 025-090); cast iron (Housing size: 110-150)

    2. Shaft: 20Cr, carbonize and quencher heat treatment make the hardness of gear tooth surface up to 56-62 HRC, retain carburization layer’s thickness between 0.3-0.5mm after precise grinding

    3. Worm Wheel: Wearable bronze alloy

Surface Painting

Direct factory provide gearbox motor/ transmission gearbox/ mechanical gearbox

For Aluminum Alloy Housing:

    1. Shot blasting and special antiseptic treatment on the aluminum alloy surface

    2. After phosphating, paint with blue or sliver.

For Cast Iron Housing:

    Before paint with blue or sliver, need paint with red antirust pain first.

Direct factory provide gearbox motor/ transmission gearbox/ mechanical gearbox

Gear Reducers

World class gear manufacturing capabilities, quality material suppliers, and a state of the art quality process allows EPT to offer the highest level of precision, durability and endurance. The EPT Planetary Reducers are designed and built for advanced high speed low backlash applications. The EPT manufacturing processes allows us to offer exceptional shock load capacities and various mounting options.

Surface Treatment

Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.

Processing Method

CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly

QC & Certificate

Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009

Package & Lead Time

Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port


Q: Are you trading company or manufacturer ?
A: Our group consists in 3 factories and 2 abroad sales corporations.

Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.

Q: How long is your delivery time ? What is your terms of payment ?
A: Generally it is 40-45 days. The time may vary depending on the product and the level of customization. For standard products, the payment is: 30% T/T in advance ,balance before shipment.

Q: What is the exact MOQ or price for your product ?
A: As an OEM company, we can provide and adapt our products to a wide range of needs.Thus, MOQ and price may greatly vary with size, material and further specifications; For instance, costly products or standard products will usually have a lower MOQ. Please contact us with all relevant details to get the most accurate quotation.