China manufacturer and exporter of gear speed reducers
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NMRV Series
Worm-Gear Speed Reducers
Worm-gear speed reducer
Worm gears with Pre-stage helical unit
Combination worm gear unit

Combination of speed variator and Worm-gear speed reducer
Torque arm
Output shaft and cover
Input flange B5 and unput flange B14

Shaft input worm-gear speed reducer and combination worm gear unit
G3 Series
Helical Gear Reducers

Three-phase motor reducer with foot screw
Three-phase motor reducer with flange
Input-flange reducer with foot screw

Input-flange reducer with output flange
Double-shaft reducer with foot screw
Double-shaft reducer with flange

Combination of stepless variator and input-flange reducer with foot screw

Combination of stepless variator and input-flange reducer with flange
Show the other products

TSRV Series stainless steel
worm-gear reducers
UDL Series speed variators

TR Series helical geared reducers

DC+NMRV series worm-gear reducers

  Add: ZiGui Plaza WenErXi Road 268
XiHu, HangZhou Zhejiang Province, China
Tel: 0086-571-88220971


  Technical Data
page 1 of 1
Efficiency is an important parameter of reducer ,and lies on the design and friction of the worm and worm wheels drive units.
The mesh data table on page 9 shows dynamic efficiency (n1=1400) and static efficiency values.
Remember that these values are only achieved after the unit has been run in.

Dynamic irreversibility is achieved when the output shaft stops instantly when drive is no longer transmitted
through the worm shaft. This condition requires a dynamic efficiency of ηd < 0.4
Static irreversibility is achieved when with the gear reducer at a standstill, the application of load to the output shaft can’t drive the worm shaft. This condition requires a static efficiency of ηs < 0.5
dynamic reversibility
low dynamic reversibility
good dynamic irreversibility
dynamic irreversibility
static reversibility
low static reversibility
static irreversibility
The table shows approximate irreversibility classes. Vibrations and shocks can affect a gear reducer’s irreversibility.
For the irreversibility conditions of a combined geared units, we must consider that the efficiency of the group is given by the product of the efficiencies of each reducer,
I.e ηd = ηd1xηd2.

Product Description Contents
1. Guide of type selection
2. Technical data
  1) Service factor
2) The admissible radial load on the shaft
3) Efficiency & Irreversibility character
4) Mesh parameter
5) Lubrication
6) Installation
7) Critical application
8) Motor coupling
9) PC features and mounting
10) Mounting positions
11) Direction of rotation
12) Performance parameter

3. Notice for ordering
4. Exploded view & name


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