NMRV / NRV Worm Gear Reducer

Compact worm reducer for fixed-ratio right-angle transmission, light conveyors, packaging machines, and OEM equipment.

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Technical Datasheets

Item	Data
Product name	NMRV / NRV Worm Gear Reducer
Product type	Compact worm gear reducer
Transmission layout	Right-angle worm transmission
Model range	NMRV025–NMRV150 / NRV by configuration
Ratio range	5–100
Combined ratio	Higher ratios by NMRV+NMRV, PC+NMRV, or JWB+NMRV combination
Power range	0.06–15 kW
Max output torque	Up to 1,550 N·m
Input forms	Motor flange input, shaft input, variator combination, pre-stage input
Output forms	Hollow bore, single output shaft, double output shaft, output flange, torque arm
Housing reference	Aluminum for smaller and medium sizes; cast iron for larger sizes
Best fit	Compact fixed-ratio right-angle drives, light conveyors, packaging equipment, small feeders, food transfer lines, and OEM machines

Model Size	Center Distance	Housing Reference	Typical Use Direction
NMRV025	25 mm	Aluminum	Small OEM mechanisms and light-duty drives
NMRV030	30 mm	Aluminum	Small conveyors, light packaging modules
NMRV040	40 mm	Aluminum	Packaging, feeding, and small transfer equipment
NMRV050	50 mm	Aluminum	Light conveyors and general machine drives
NMRV063	63 mm	Aluminum	Food transfer, carton handling, small process machines
NMRV075	75 mm	Aluminum	Medium light-duty conveying and packaging equipment
NMRV090	90 mm	Aluminum	Larger conveyor sections and compact process equipment
NMRV105	105 mm	Aluminum	Medium-duty worm reducer positions
NMRV110	110 mm	Aluminum / cast iron by configuration	Medium-duty right-angle drive positions
NMRV130	130 mm	Cast iron reference	Larger worm reducer positions
NMRV150	150 mm	Cast iron reference	Higher-torque worm reducer positions

Is NMRV the same as RV?

NMRV and RV are commonly used naming directions for compact worm gear reducers. NMRV / RV refers to the same compact right-angle worm reducer product family. Old references such as SNW and SVF should be checked by model and drawing before replacement.

What is the ratio range of NMRV / RV worm gear reducers?

The standard ratio range is commonly listed as 7.5–100, while older material also includes 5–100. Final ratio availability should be confirmed by reducer size and datasheet.

What is the difference between NMRV and NRV?

NMRV usually refers to motor-input worm reducer configurations. NRV is used when shaft input is required. The correct input form should be confirmed according to motor interface or machine-side input connection.

Can NMRV / RV be used with an electric motor?

Yes. NMRV / RV can be configured with IEC motor input, compact motor input, square flange, or other supported motor interface options. Motor frame, power, voltage, speed, and flange size should be confirmed.

Can NMRV / RV be used for adjustable speed?

A standalone NMRV / RV reducer is a fixed-ratio reducer. For mechanical speed adjustment, review JWB+NMRV. For electronic speed control, review SV200 with a suitable motor and reducer combination.

What information is needed for replacement?

Send the existing model code, nameplate photo, ratio, output shaft diameter, flange size, mounting hole dimensions, output direction, and installation photos.

Can Starshine provide CAD or drawings?

2D drawings and 3D CAD files can be requested after the model, ratio, output shaft, flange, torque arm, and mounting position are confirmed.

When should SCK be considered instead of NMRV?

SCK should be reviewed when the application needs an RV-compatible right-angle reducer path with helical-hypoid transmission and higher-efficiency direction. Exact replacement should still be checked by mounting and shaft dimensions.