GBC-NMRV-VS Dual Input Worm Gearbox with IEC Motor Flange
The GBC-NMRV-VS is a dual-input worm gearbox featuring an IEC motor flange on one side and a worm shaft extension on the other. This configuration enables direct motor connection plus hand-crank override, encoder feedback, or multi-unit synchronisation from a single gearbox. Available in frame sizes NMRV-VS025–NMRV-VS150, ratios 7.5:1 to 100:1, input power 0.12–7.5 kW. Built with thickened high-standard copper worm gear for superior wear and impact resistance, Viton oil seals for high-temperature reliability, and die-cast housing. ISO 9001:2015 certified. Contact us for OEM service and competitive quotation.
The GBC-NMRV-VS is a dual-input worm reducer that combines an IEC motor flange on one side with a worm shaft extension on the other. This unique configuration enables one input to connect directly to a standard motor (AC, DC, servo), stepper motor, continuously variable transmission, or flanged electromagnetic clutch brake, while the opposite shaft extension can drive a hand-crank manual override, encoder for speed feedback, coupling for cascade gearbox stages, or simply allow synchronisation of two or more equipment sets from a single gearbox.
Available in ten frame sizes from NMRV-VS 025 to NMRV-VS 150, with gear ratios from 7.5:1 to 100:1 and input power from 0.12 kW to 7.5 kW, the GBC-NMRV-VS is built with a thickened worm gear using high-standard copper alloy — delivering better wear resistance, impact strength, and crack resistance than standard worm gears. The hollow shaft output connects directly to the driven equipment's solid shaft, with optional output flange and solid shaft accessories.
Every unit is manufactured under ISO 9001:2015 quality control, with Viton oil seals for superior high-temperature resistance and anti-oxidation, and premium C&U/QC bearings. Contact us for OEM service and competitive quotation.
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | GBC-NMRV-VS Dual Input Worm Gearbox with IEC Motor Flange |
| Available Models | GBC-NMRV-VS 025, 030, 040, 050, 063, 075, 090, 110, 130, 150 |
| Input Configurations | IEC Motor Flange (AC / DC / Servo) + Worm Shaft Tail Extension (dual input) |
| Output Configurations | Keyed Hollow Shaft · Hollow Shaft with Output Flange · Plug-in Solid Shaft |
| Gear Ratio Range | 7.5 : 1, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Input Power | 0.12 kW – 7.5 kW (higher on request) |
| Housing Material | Die-cast iron |
| Worm Gear Material | Thickened tin copper — enhanced wear & impact resistance |
| Worm Shaft Material | 20CrMnTi — carburized & quenched |
| Output Shaft Material | Chromium steel 45# |
| Bearings | C&U / QC (custom brand available) |
| Seals | SKF / NAK — Viton oil seal for high-temperature resistance & anti-oxidation |
| Lubricant | Synthetic or mineral oil |
| IEC Motor Flanges | 56B14, 63B14, 63B5, 71B14, 80B14, etc. |
| Color Options | Blue / Black / Grey (custom color on request) |
| Certifications | ISO 9001:2015 · CE · SGS |
| Warranty | 12 months |
| Packing | Carton / Wooden case |
| Production Capacity | 15,000 units / month |
Parts Structure Drawing
Features & Benefits
✅ Dual Input — Motor Flange + Shaft Extension
One side mounts directly to any IEC motor; the other accommodates hand-cranks, encoders, or cascade gearboxes — maximum versatility in a single unit.
✅ Thickened High-Standard Copper Worm Gear
More copper material delivers better wear resistance, impact strength, and crack resistance than standard worm gears on the market.
✅ Viton Oil Seals
Premium Viton seals withstand high temperatures up to 200 °C with excellent anti-oxidation properties, virtually eliminating oil leakage.
✅ Lightweight Aluminum Alloy Housing
Superior strength-to-weight ratio with excellent heat dissipation, long service life, and clean aesthetic appearance.
✅ No Coupling Required
Direct motor flange connection eliminates couplings, reduces alignment errors, and produces a more compact drive package.
✅ Self-Locking Worm Drive
At higher ratios, the worm mechanism prevents back-driving — saving the cost of separate braking devices.
✅ All-Direction Installation
Universal mounting positions with large output torque and smooth, stable operation.
✅ Flexible Output Options
Hollow shaft for direct mounting, output flange for bolted connection, or solid shaft for coupling — each available across all frame sizes.
Applications
The GBC-NMRV-VS dual-input worm gear reducer is ideal for any application requiring motor-driven operation with a secondary input for manual override, feedback, or multi-unit synchronisation.
🤖
Automation & Electromechanical
PLC-controlled lines, robotic auxiliaries, automated assembly equipment.
📦
Packaging & Transport
Carton sealers, labelling machines, palletizers, and sorting systems.
🏭
Food Processing & Beverage
Mixers, conveyor drives, bottling and filling lines.
⚙️
Mining, Quarry & Cement
Crushers, vibrating screens, material handling under heavy loads.
🚗
Construction & Metal Processing
Welding positioners, rebar benders, crane auxiliaries.
👕
Textile Machinery
Spinning, dyeing, weaving — smooth vibration-free power delivery.
⚛
Chemical & Plastics
Agitators, extruder drives, reactor equipment in corrosive environments.
⚡
Conveyor & Material Handling
Belt conveyors, screw feeders, bucket elevators.
Mounting Positions
Torque Arm Mounting
| Model | LA (mm) | LB (mm) | d (mm) |
|---|---|---|---|
| GBC-NMRV-VS030 | 92 | 60 | 8 |
| GBC-NMRV-VS040 | 108 | 72 | 8 |
| GBC-NMRV-VS050 | 135 | 95 | 10 |
| GBC-NMRV-VS063 | 160 | 110 | 10 |
| GBC-NMRV-VS075 | 185 | 130 | 12 |
| GBC-NMRV-VS090 | 215 | 155 | 12 |
| GBC-NMRV-VS110 | 270 | 200 | 14 |
| GBC-NMRV-VS130 | 310 | 230 | 16 |
| GBC-NMRV-VS150 | 360 | 270 | 20 |
LA = Torque arm total length · LB = Mounting bolt centre distance · d = Bolt diameter
📄 Need a CAD file? Contact our engineering team for 2D DXF or 3D STEP files for any GBC-NMRV-VS model.
How to Customise Your Worm Gearbox
We own rich production and industrial experience to provide the finest quality worm gearbox. Customisation on shaft diameter, shaft length, output flange, housing colour, and special ratio configurations is available. Our sales team provides expert model selection, OEM service, and solution suggestions. To order, please confirm:
✔ Reducer model & speed ratio
✔ Input hole diameter / Input power / Input flange code
✔ Output hole or shaft size
✔ Any additional accessories (torque arm, output flange, motor, etc.)
Installation Precautions
⚠️ Check the output shaft rotation direction before assembling with your equipment.
⚠️ Inspect shaft diameter, bore, key, and keyway tolerances to avoid performance issues from loose or tight fits.
⚠️ Mount the gearbox tightly on the equipment to prevent looseness and vibration.
⚠️ Avoid direct sunlight and extreme weather exposure.
⚠️ If stored 4–6 months, check oil seal elasticity — replace if it has stiffened.
⚠️ Do not start with full load — increase load gradually during break-in.
⚠️ Standard operating temperature: -5 °C to +40 °C. Contact us for conditions outside this range.
Frequently Asked Questions
What does 'VS' mean in GBC-NMRV-VS?
VS indicates dual input shaft extension — one side has an IEC motor flange, and the other side has a worm shaft tail extension for hand-cranks, encoders, or cascade connections.
Can I synchronise two machines from one gearbox?
Yes. The dual input allows the motor to drive one side while the shaft extension on the other side can be coupled to a second gearbox or machine, enabling synchronised operation.
Can you customise the shaft or flange?
Yes. Custom shaft lengths, output flanges, special ratios, and housing colours are available. Lead time is typically 15–25 working days.
What is the typical lead time?
Standard models ship within 3–7 working days. Custom orders require 15–25 working days.
What warranty do you provide?
12-month warranty covering material and manufacturing defects under normal operating conditions.
What makes the worm gear more durable than competitors?
We use thickened worm gears with high-standard copper and more copper material, delivering better wear resistance, impact strength, and crack resistance.
Can the gearbox be mounted in any position?
Yes — B3, B5, B6, B7, B8, V5, V6 positions are supported. Oil level adjustments may be needed for non-standard positions.
What Our Customers Say
⭐⭐⭐⭐⭐
"The dual input on the NMRV-VS090 was perfect — motor on the flange side, hand-crank on the extension for maintenance mode. We no longer need to decouple the motor during servicing. Saved us hours per month."
— Henrik J., Maintenance Engineer,
Conveyor Systems · Netherlands
⭐⭐⭐⭐⭐
"We use NMRV-VS063 with an incremental encoder on the extension shaft for closed-loop speed control on our pharmaceutical filling line. The Viton seals handle our 70°C washdown temperature without any leaks."
— Dr. Sarah W., Automation Lead,
Pharmaceutical Manufacturing · Germany
⭐⭐⭐⭐⭐
"Ordered 60 units with custom shaft extensions for synchronising parallel conveyors. Technical support helped us select the right ratios and IEC flange codes. Delivered in 14 days — excellent turnaround."
— Alex T., Purchasing Director,
Material Handling · Australia
Related & Complementary Products
⚙️ GBC-NRV Shaft Input Worm Gearbox
Standard shaft-input worm reducer for coupling, belt, or chain-driven applications.
🔄 GBC-NMRV Flange Input Worm Gearbox
IEC flange-input worm gear reducer for direct motor mounting.
⚡ Three-Phase AC Induction Motors
IEC motors from 0.06–15 kW for direct coupling with GBC worm gearboxes.
Ready to Get Started?
Get a Competitive Quotation in Under 12 Hours
Whether you need a single sample, a bulk OEM order, or a fully customised worm gearbox solution — our engineering and sales teams are ready to help. Tell us your requirements and we will recommend the best GBC-NMRV-VS configuration for your project.
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Warranty: 12 months | Shipping: Worldwide
The GBC-NMRV-VS is a dual-input worm gearbox featuring an IEC motor flange on one side and a worm shaft extension on the other. This configuration enables direct motor connection plus hand-crank override, encoder feedback, or multi-unit synchronisation from a single gearbox. Available in frame sizes NMRV-VS025–NMRV-VS150, ratios 7.5:1 to 100:1, input power 0.12–7.5 kW. Built with thickened high-standard copper worm gear for superior wear and impact resistance, Viton oil seals for high-temperature reliability, and die-cast housing. ISO 9001:2015 certified. Contact us for OEM service and competitive quotation.
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