GBC-NRV-VS Dual Solid Shaft Input Worm Gearbox
The GBC-NRV-VS is a dual solid shaft input worm gearbox featuring worm shaft extensions on both sides of the housing, enabling hand-crank manual overrides, encoder speed feedback, or multi-stage gearbox cascading. Available in ten frame sizes (NRV-VS025–NRV-VS150) with gear ratios from 7.5:1 to 100:1 and input power from 0.12 kW to 7.5 kW. Built with a die-cast iron housing, carburized 20CrMnTi worm shaft, tin-copper worm gear, and IP55 sealing. The self-locking worm drive eliminates external braking devices. Ideal for industrial automation, packaging lines, CNC machine tools, and conveyor systems. ISO 9001:2015 certified.
The GBC-NRV-VS is a dual-shaft-input worm reducer featuring a worm shaft with extension on both sides of the housing. This double input shaft configuration allows the integration of auxiliary devices such as hand-crank manual overrides, encoder speed measurement, or the cascade coupling of multiple gearbox stages — making it one of the most versatile models in the RV worm gearbox family.
Available in ten frame sizes from NRV-VS 025 to NRV-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-NRV-VS is built around a hardened 20CrMnTi worm shaft meshing with a tin-copper worm gear inside a robust die-cast iron housing. The self-locking worm drive eliminates external braking in many applications, while IP55 sealing protects internal components against dust and moisture.
Every unit is manufactured under ISO 9001:2015 quality control with a monthly capacity exceeding 15,000 units. Contact us for a free engineering consultation and competitive quotation.

Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | GBC-NRV-VS Dual Solid Shaft Input Worm Gearbox |
| Available Models | GBC-NRV-VS 025, 030, 040, 050, 063, 075, 090, 110, 130, 150 |
| Input Configurations | Dual Solid Shaft Input (worm shaft extension on both sides) |
| 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 ratings available on request) |
| Housing Material | Die-cast iron |
| Worm Gear Material | Tin copper |
| Worm Shaft Material | 20CrMnTi — carburized & quenched |
| Output Shaft Material | Chromium steel 45# |
| Bearings | C&U / QC (custom brand available) |
| Seals | SKF / NAK |
| Lubricant | Synthetic or mineral oil |
| IEC Motor Flanges | 56B14, 63B14, 63B5, 71B14, 80B14, etc. |
| Protection Rating | IP55 |
| Color Options | Blue / Black / Silver (custom color on request) |
| Certifications | ISO 9001:2015 · CE · SGS |
| Warranty | 12 months |
| Packing | Carton / Wooden pallet / Wooden case |
| Production Capacity | 15,000 units / month |
Parts Drawing

Features & Benefits
✅ Dual Input Shaft Extension (VS)
Both ends of the worm shaft extend outside the housing, enabling hand-crank manual overrides, encoder feedback, or cascade coupling of multiple gearbox stages in a single drive train.
✅ Rapid Stop — 2 to 5 Seconds
Compared with 5–10 seconds for conventional reducers, the GBC-NRV-VS achieves full stop in as little as 2 seconds, enhancing machine safety and cycle-time efficiency.
✅ IP55 Dust & Moisture Protection
Grade IP55 sealing provides excellent isolation against dust and moisture, making it suitable for food processing, outdoor, and washdown environments.
✅ Excellent Thermal Conductivity
Integrated cooling ribs on the housing maximise heat transfer, keeping operating temperatures low and extending lubricant and bearing life.
✅ Self-Locking Worm Drive
Natural self-locking at higher ratios eliminates the need for additional braking devices, reducing system cost and installation complexity.
✅ Enclosed Transmission Structure
No exposed chains, belts, or sprockets — reducing operator injury risk and meeting strict industrial safety standards.
✅ Flexible Output Options
Choose from keyed hollow shaft, output flange, or plug-in solid shaft to match your existing machine design.
✅ Long Service Life
Smooth, low-noise operation suitable for long-term continuous work in harsh industrial environments.

Applications
The GBC-NRV-VS dual-shaft-input worm gear reducer is ideal for applications requiring manual override, encoder feedback, or multi-stage gearbox combinations.
🤖
Industrial Automation & Robotics
Robotic arms, CNC machine tools, rotary indexing tables, and automated assembly lines where encoder feedback via the second shaft is essential.
🏭
Food & Beverage Processing
Conveyor drives, mixers, and bottling lines where the hand-crank shaft enables manual operation during maintenance or power outages.
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Packaging & Printing
Labelling machines, carton sealers, and print rollers requiring precise speed control with feedback capability.
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Metallurgy & Mining
Ore crushers, vibrating screens, and material handling under heavy loads and harsh conditions.
🚗
Automobile Manufacturing
Assembly line conveyors, welding positioners, and paint shop equipment.
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Environmental Engineering
Wastewater treatment, dredgers, and pollution control equipment.
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Textile Machinery
Spinning, weaving, and dyeing equipment requiring smooth, vibration-free power delivery.
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Warehousing & 3D Parking
Automated storage systems and multi-level parking structures.
Dimensional Drawings
Below you will find the outline installation dimensions, low-speed shaft details, cover dimensions, and torque arm specifications for the GBC-NRV-VS series.
Gearbox Outline & Installation Dimensions

| Model | Centre Dist. A (mm) | H (mm) | H1 (mm) | L (mm) | Input Shaft Dia. (mm) | Output Bore (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| GBC-NRV-VS025 | 25 | 50 | 25 | 68 | 9 | 10 | 0.8 |
| GBC-NRV-VS030 | 30 | 63 | 30 | 84 | 9 | 14 | 1.5 |
| GBC-NRV-VS040 | 40 | 78 | 40 | 103 | 11 | 18 | 2.5 |
| GBC-NRV-VS050 | 50 | 97 | 50 | 126 | 14 | 25 | 4.5 |
| GBC-NRV-VS063 | 63 | 116 | 63 | 145 | 19 | 25 | 7.5 |
| GBC-NRV-VS075 | 75 | 137 | 75 | 168 | 24 | 28 | 11 |
| GBC-NRV-VS090 | 90 | 160 | 90 | 197 | 24 | 35 | 18 |
| GBC-NRV-VS110 | 110 | 195 | 110 | 250 | 28 | 42 | 34 |
| GBC-NRV-VS130 | 130 | 220 | 130 | 270 | 32 | 45 | 50 |
| GBC-NRV-VS150 | 150 | 255 | 150 | 305 | 38 | 50 | 75 |
Low-Speed Output Shafts

Gearbox Cover

Torque Arm Dimensions

| Model | LA (mm) | LB (mm) | d (mm) |
|---|---|---|---|
| GBC-NRV-VS030 | 92 | 60 | 8 |
| GBC-NRV-VS040 | 108 | 72 | 8 |
| GBC-NRV-VS050 | 135 | 95 | 10 |
| GBC-NRV-VS063 | 160 | 110 | 10 |
| GBC-NRV-VS075 | 185 | 130 | 12 |
| GBC-NRV-VS090 | 215 | 155 | 12 |
| GBC-NRV-VS110 | 270 | 200 | 14 |
| GBC-NRV-VS130 | 310 | 230 | 16 |
| GBC-NRV-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-NRV-VS model.
Frequently Asked Questions
What does 'VS' mean in GBC-NRV-VS?
VS stands for dual (same-direction) input shaft extension. Both ends of the worm shaft protrude from the housing, allowing connection of hand-crank devices, encoders, or additional gearbox stages on the opposite end.
What is the minimum order quantity (MOQ)?
No strict MOQ — orders from a single unit are accepted. Volume pricing improves at 10, 50, 100, and 500+ pieces.
Can you customise the shaft extension lengths?
Yes. We supply custom shaft lengths, special output flanges, double output shafts, and unique ratio configurations. 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 are the operating temperature limits?
Standard operating range is -5 °C to +40 °C ambient. For temperatures outside this range, please contact our technical department for special lubrication and sealing solutions.
Can the GBC-NRV-VS be mounted in any orientation?
Yes — foot mount, flange mount, and torque-arm mount in horizontal, vertical, or inverted orientations. Different positions may require oil level adjustments.
What Our Customers Say
⭐⭐⭐⭐⭐
"The dual-shaft extension was exactly what we needed for our conveyor system — motor on one side, manual hand-crank on the other for maintenance mode. The GBC-NRV-VS090 has been running flawlessly for over a year."
— Henrik L., Automation Engineer,
Conveyor Systems Integrator · Sweden
⭐⭐⭐⭐⭐
"We use GBC-NRV-VS063 units with an encoder on the extension shaft for closed-loop speed control on our packaging line. Smooth operation, low noise, and the IP55 rating handles our washdown requirements perfectly."
— Sarah K., Controls Engineer,
Pharmaceutical Packaging · Canada
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"Ordered 80 units with custom shaft lengths. Samples arrived in two weeks and the full batch in four. Excellent quality and very responsive technical support throughout."
— Wei C., Purchasing Manager,
Industrial Automation · Singapore
Related & Complementary Products
⚙️ GBC-NRV Shaft Input Worm Gearbox
Standard shaft-input worm reducer for coupling, belt, or chain-driven applications without a direct motor flange.
🔄 GBC-NMRV Flange Input Worm Gearbox
IEC-standard flange-input worm gear reducer for direct motor mounting — plug-and-play drive solution.
⚡ Three-Phase AC Induction Motors
IEC-standard electric motors from 0.06 kW to 15 kW for direct coupling with GBC worm gearboxes.
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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 application requirements and we will recommend the best GBC-NRV-VS model, ratio, and configuration for your project.
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Warranty: 12 months | Shipping: Worldwide
The GBC-NRV-VS is a dual solid shaft input worm gearbox featuring worm shaft extensions on both sides of the housing, enabling hand-crank manual overrides, encoder speed feedback, or multi-stage gearbox cascading. Available in ten frame sizes (NRV-VS025–NRV-VS150) with gear ratios from 7.5:1 to 100:1 and input power from 0.12 kW to 7.5 kW. Built with a die-cast iron housing, carburized 20CrMnTi worm shaft, tin-copper worm gear, and IP55 sealing. The self-locking worm drive eliminates external braking devices. Ideal for industrial automation, packaging lines, CNC machine tools, and conveyor systems. ISO 9001:2015 certified.






