NMRV-VS Worm Gearbox with Input Shaft
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Technical Specifications
NMRV Worm Gear Reducer delivers dependable high-torque reduction in a compact footprint. With flexible mounting options, wide ratio coverage, and easy motor coupling, it’s built for fast replacement and straightforward installation. ZPGear supports OEM/ODM customization for shaft size, flange, paint color, nameplate, and packaging—helping you match your equipment and shorten lead time.
Core Performance Parameters
Key operating range and performance data for quick comparison.
| Model Series | NMRV 030 / 040 / 050 / 063 / 075 / 090 / 110 / 130 / 150 |
|---|---|
| Gear Ratio Range | 5:1 to 100:1 (12 standard ratios, custom available) |
| Output Torque | 1.8 N·m ~ 500 N·m |
| Input Power | 0.06 kW ~ 15 kW |
| Efficiency | 60% ~ 90% (decreases with higher ratios) |
| Noise Level | < 65 dB (at 1 m distance) |
Mechanical Design & Materials
Materials, sealing, and interface options for durability and compatibility.
Core Components
- Worm: 20CrMnTi alloy steel, carburized & quenched (HRC58–62).
- Worm Wheel: ZCuSn10Pb1 tin bronze for superior wear resistance.
- Housing: ADC12 die-cast aluminum with cooling fins.
Seals & Interfaces
- Sealing: Double-lip oil seal + labyrinth structure (IP65 rated).
- Input: IEC/B5/B14 standard flange for motor compatibility.
- Output: Solid or hollow shaft options available.
Typical Application Scenarios
Common use cases where this gearbox is frequently applied.
NMRV-VS Input Shaft Selection Guide
NMRV-VS is the external input-shaft configuration in the compact NMRV family. It is intended for layouts where the reducer connects to a separately positioned power source through an approved shaft connection.
Where NMRV-VS Fits Best
- Compact right-angle transmissions requiring an external input shaft.
- Replacement projects that must retain the NMRV-VS input interface.
- Machines where the prime mover is supported separately from the reducer.
When NMRV-VS May Not Be the Right Choice
Compare NMRV when a motor-flange input arrangement is required. Compare NMRV-F when the key requirement is a flange-output connection. NMRV-VS should not be selected until shaft alignment, guarding, support, and dimensional compatibility are confirmed.
NMRV-VS Model FAQ
What distinguishes NMRV-VS from standard NMRV?
NMRV-VS uses an external input-shaft arrangement, while the standard NMRV page describes a motor-flange input configuration.
Is NMRV-VS suitable for replacement projects?
It can be considered when the frame, ratio, shaft dimensions, mounting position, and operating requirements match the existing reducer.
Which clearances must be checked?
Check space for the input connection and guard, output interface, mounting fasteners, and routine maintenance access.
What information is needed for selection?
Provide the required output speed or ratio, motor speed and power, load condition, operating schedule, mounting position, shaft dimensions, and existing drawing or nameplate.
Final selection and installation interfaces must be confirmed against the approved manufacturer drawing.
Engineering Data and Selection Verification
Use the information on this NMRV-VS Worm Gearbox with Input Shaft page for preliminary comparison. Final dimensions, materials, interfaces and operating limits must be confirmed against the current manufacturer catalog or an approved project drawing before purchase, fabrication or installation.
Table scope: each parameter row applies only to the model or size identified in that row. Do not interpolate, combine or transfer values between sizes without manufacturer confirmation.
Required Project Inputs
- Input speed and motor information
- Required output speed or target ratio
- Driven load type, start-stop pattern and operating schedule
- Mounting position, shaft direction and available installation space
- Site environment and maintenance-access requirements
Interfaces to Confirm
- Model size and mounting-hole pattern
- Input and output shaft or bore dimensions
- Flange, keyway, coupling and guarding arrangement
- Shaft center position and surrounding clearance
- Lubrication and inspection access
Reproducible Speed and Ratio Check
Required ratio: input speed ÷ target output speed. Expected output speed: input speed ÷ selected ratio. Record the source of each input value and use consistent units.
This arithmetic check does not confirm torque, power, service factor, temperature, efficiency or life. Ask ZPGear to verify those items from the current manufacturer data for the selected model and operating condition.
Source record: keep the manufacturer name, catalog or drawing number, revision date, selected model size, project inputs and final approval sheet with the order documentation. Send the project information to ZPGear for confirmation.