GBC-NRV Shaft Input Worm Gearbox — Compact Worm Gear Speed Reducer
The GBC-NRV Shaft Input Worm Gearbox is a high-efficiency, compact speed reducer engineered for demanding industrial applications. Available in ten frame sizes (NRV025–NRV150) with gear ratios from 7.5:1 to 100:1 and input power ranging from 0.12 kW to 7.5 kW, this worm gear reducer delivers reliable torque conversion for conveyors, packaging lines, food processing machinery, and automated production systems. Its die-cast iron housing, tin-bronze worm gear, and carburized 20CrMnTi worm shaft ensure exceptional durability and long service life. The built-in self-locking function eliminates the need for external braking devices, reducing system cost and complexity. IP55-rated and ISO 9001:2015 certified, the GBC-NRV gearbox is a trusted choice for OEMs and system integrators worldwide. Contact us today for competitive bulk pricing and fast delivery.
The GBC-NRV worm gearbox is a precision-engineered shaft-input worm reducer designed for a broad spectrum of power transmission applications. As part of the proven RV series, the NRV variant features a solid input shaft configuration — distinguishing it from the GBC-NMRV flange-input model — making it ideally suited for direct coupling with motors, pulleys, and other drive elements. Available in ten standardised frame sizes from NRV025 through NRV150, the gearbox accommodates input power from 0.12 kW to 7.5 kW and beyond, with reduction ratios spanning 7.5:1 to 100:1.
Internally, the unit relies on a hardened steel worm meshing with a tin-bronze worm gear. This combination produces exceptionally smooth, low-noise transmission while delivering high torque in a compact envelope. Under certain ratio conditions, the worm drive exhibits a natural self-locking characteristic, meaning the output shaft cannot be back-driven — a valuable safety feature that eliminates the need for costly external brake mechanisms in vertical lifting, conveyor, and tensioning applications.
Every GBC-NRV gearbox leaving our Hangzhou production facility undergoes rigorous quality inspection under our ISO 9001:2015 management system. With a monthly capacity exceeding 15,000 units, we serve OEM manufacturers, system integrators, and distributors across six continents. Whether you need a single prototype or a container-load shipment, our engineering team is ready to help you select the optimal model, ratio, and mounting configuration for your application.
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | GBC-NRV Shaft Input Worm Gearbox / Worm Gear Speed Reducer |
| Available Models | NRV025, NRV030, NRV040, NRV050, NRV063, NRV075, NRV090, NRV110, NRV130, NRV150 |
| Input Configurations | Solid Shaft Input · Worm Shaft Tail Extension 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 ratings available on request) |
| Housing Material | Die-cast iron |
| Worm Gear Material | Tin bronze (ZCuSn10Pb1) |
| Worm Shaft Material | 20CrMnTi — carburized & quenched |
| Output Shaft Material | Chromium steel 45# |
| Bearings | C&U / QC / HRB (custom brand available) |
| Seals | SKF / NAK / KSK (custom brand available) |
| Lubricant | Synthetic or mineral oil (pre-filled WA460) |
| 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 |
Features & Benefits
✅ Self-Locking Worm Drive
Eliminates the need for additional braking devices in many applications, significantly reducing system cost, installation complexity, and maintenance.
✅ Rapid Stop — 2 to 5 Seconds
Compared with 5–10 seconds for conventional reducers, the GBC-NRV achieves full stop in as little as 2 seconds, enhancing machine safety and cycle-time efficiency.
✅ IP55 Dust & Moisture Protection
Sealed to IP55, the gearbox resists dust ingress and water jets, making it suitable for food processing, outdoor installations, and washdown environments.
✅ Excellent Thermal Dissipation
Integrated cooling ribs on the die-cast housing maximise heat transfer, keeping operating temperatures low and extending lubricant and bearing life.
✅ Hardened 20CrMnTi Worm Shaft
Carburized and quenched alloy steel ensures high surface hardness, superior wear resistance, and consistent performance over millions of duty cycles.
✅ Tin-Bronze Worm Gear
Low friction coefficient against the steel worm delivers smooth, quiet operation, ideal for noise-sensitive environments such as laboratories and packaging halls.
✅ 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, flange output, or plug-in solid shaft to match your existing machine design without costly adapter modifications.
Applications — Where GBC-NRV Worm Gearboxes Excel
The GBC-NRV shaft input worm gear reducer is trusted across dozens of industries. Its compact footprint, self-locking capability, and wide ratio range make it a versatile building block for virtually any power transmission system requiring speed reduction and torque multiplication.
🏭
Food & Beverage Processing
Conveyor belt systems, mixing machines, bottling lines, and bakery equipment where IP55 protection and food-safe operation are essential.
📦
Automated Packaging Lines
Carton erectors, palletizers, shrink wrappers, and labelling machines requiring precise speed control and rapid stop functionality.
🤖
Industrial Robotics & Automation
Robotic arm joints, rotary indexing tables, and CNC machine tool changers where compact size and backlash control matter.
⚙️
Metallurgy & Mining Equipment
Ore crushers, vibrating screens, rolling mills, and material handling systems operating under heavy loads and harsh conditions.
👕
Textile Equipment
Spinning frames, looms, dyeing machines, and fabric winding systems where smooth, vibration-free power delivery protects delicate materials.
🚗
Automobile Manufacturing
Assembly line conveyors, welding positioners, paint shop equipment, and tire building machines in automotive production plants.
🏫
Warehousing & Logistics
Automated storage and retrieval systems (AS/RS), three-dimensional parking systems, and sorting machines in distribution centres.
⚛
Environmental Engineering
Wastewater treatment aerators, sludge scrapers, dredgers, and pollution control equipment exposed to moisture and chemicals.
Dimensional Drawings & Installation Dimensions
Below you will find the installation dimension drawings for the GBC-NRV shaft input worm gearbox series. These drawings include all critical mounting dimensions, shaft diameters, keyway specifications, and bolt-hole patterns required for mechanical integration.
GBC-NRV Installation Dimension Table (mm)
| Model | Centre Height (H) | Centre Distance (A) | Output Bore (D1) | Input Shaft (D2) | L | Flange Dia. (F) | Bolt Holes (n×d) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| GBC-NRV025 | 25 | 25 | 10 | 9 | 54 | 55 | 4×M4 | 0.7 |
| GBC-NRV030 | 30 | 30 | 14 | 9 | 62 | 62 | 4×M5 | 1.0 |
| GBC-NRV040 | 40 | 40 | 18 | 11 | 78 | 80 | 4×M6 | 2.3 |
| GBC-NRV050 | 50 | 50 | 25 | 14 | 97 | 100 | 4×M6 | 3.5 |
| GBC-NRV063 | 63 | 63 | 25 | 14 | 112 | 120 | 4×M8 | 6.2 |
| GBC-NRV075 | 75 | 75 | 28 | 19 | 137 | 140 | 4×M8 | 9.0 |
| GBC-NRV090 | 90 | 90 | 35 | 24 | 160 | 160 | 4×M10 | 13.0 |
| GBC-NRV110 | 110 | 110 | 42 | 28 | 195 | 200 | 4×M10 | 22.0 |
| GBC-NRV130 | 130 | 130 | 45 | 32 | 220 | 250 | 8×M10 | 34.0 |
| GBC-NRV150 | 150 | 150 | 50 | 38 | 255 | 280 | 8×M12 | 48.0 |
📄 Need a CAD file? Contact our engineering team for 2D DXF or 3D STEP files for any GBC-NRV model.
Selection Guide — How to Choose the Right GBC-NRV Model
Selecting the correct worm gearbox requires matching your application's torque, speed, and mounting requirements to the right frame size and gear ratio. Follow the steps below or contact our engineers for a free personalised recommendation.
Step 1 — Determine Your Required Output Torque
Calculate the torque your driven equipment needs at the output shaft. Include a service factor (typically 1.0–2.0) based on duty cycle — continuous, intermittent, or shock-loaded. Our catalogue provides rated output torque for every model and ratio combination.
Step 2 — Select the Gear Ratio
Divide the motor speed by your desired output speed to get the required ratio. GBC-NRV gearboxes are available in ratios from 7.5:1 to 100:1. For ratios exceeding 100:1, consider a double-stage combination such as NRV + NRV or NMRV + NRV.
Step 3 — Match the Frame Size to Your Motor
Each frame size accepts a specific input shaft diameter. Verify that your motor's shaft diameter and power rating fall within the gearbox's input specifications. The table below provides a quick-reference guide.
| Model | Frame Size (mm) | Typical Input Power | Ratios Available | Suggested Motor Pairing |
|---|---|---|---|---|
| NRV025 | 25 | 0.12 – 0.18 kW | 7.5 – 100 | NEMA 17 stepper / small AC |
| NRV030 | 30 | 0.12 – 0.25 kW | 7.5 – 100 | NEMA 23 stepper |
| NRV040 | 40 | 0.18 – 0.55 kW | 7.5 – 100 | NEMA 23 / NEMA 34 |
| NRV050 | 50 | 0.25 – 1.1 kW | 7.5 – 100 | NEMA 34 / IEC 71 |
| NRV063 | 63 | 0.37 – 1.5 kW | 7.5 – 100 | IEC 71 / IEC 80 |
| NRV075 | 75 | 0.55 – 2.2 kW | 7.5 – 100 | IEC 80 / IEC 90 |
| NRV090 | 90 | 0.75 – 4.0 kW | 7.5 – 100 | IEC 90 / IEC 100 |
| NRV110 | 110 | 1.5 – 5.5 kW | 7.5 – 100 | IEC 100 / IEC 112 |
| NRV130 | 130 | 2.2 – 7.5 kW | 7.5 – 100 | IEC 112 / IEC 132 |
| NRV150 | 150 | 4.0 – 7.5 kW+ | 7.5 – 100 | IEC 132 / IEC 160 |
Step 4 — Choose Your Output Configuration
Determine whether your machine requires a keyed hollow shaft (for direct mounting onto a driven shaft), an output flange (for coupling to other components), or a plug-in solid shaft (for direct shaft connection). Each option is available across all frame sizes.
Step 5 — Consider Combination Options
For applications requiring very high ratios (above 100:1) or special input configurations, GBC-NRV gearboxes can be combined in various arrangements: NMRV + NMRV double stage, NMRV + NRV, NMRV + variator (UDL), or direct motor-mounted NMRV + motor. Our team can help you configure the optimal combination.
Frequently Asked Questions
What is the difference between GBC-NRV and GBC-NMRV worm gearboxes?
The primary difference is the input configuration. GBC-NRV models use a solid shaft input, making them ideal for coupling to motors or driven shafts via couplings, belts, or chains. GBC-NMRV models feature a square flange input designed for direct IEC-standard motor mounting. Internally, the transmission mechanism, materials, and output options are identical across both variants.
What is the minimum order quantity (MOQ)?
There is no strict MOQ — we accept orders starting from a single unit for sample and evaluation purposes. However, unit pricing improves significantly at quantities of 10, 50, 100, and 500+ pieces. Contact our sales team for a tiered price quotation tailored to your volume.
Can you customise the gearbox (special ratios, colours, shaft lengths, mounting)?
Yes. We routinely supply customised versions with non-standard shaft dimensions, special mounting flanges, custom paint colours, double input shafts, and unique ratio configurations. For custom orders, typical lead time is 15–25 working days depending on complexity. Please send your technical drawing or specification sheet and we will confirm feasibility within 12 hours.
What is the typical lead time and shipping method?
Standard models are normally in stock and ship within 3–7 working days. Custom or large-volume orders typically require 15–25 working days. We ship from Ningbo and Shanghai ports and can arrange sea freight, air freight, or express courier (DHL, FedEx, UPS) based on urgency and destination. Our logistics team will recommend the most cost-effective option for your order.
What warranty do you provide, and what happens if I receive a defective unit?
Every GBC-NRV gearbox is backed by a 12-month warranty covering material and manufacturing defects under normal operating conditions. If a unit arrives damaged or develops a fault within the warranty period, send us photos and a brief description — we will either ship a replacement unit or provide a refund, depending on your preference. We also maintain a responsive after-sales engineering team to assist with troubleshooting.
How often should the lubricant be changed?
Each gearbox is pre-filled with WA460 lubricating oil at the factory. The first oil change should be performed after 400 hours of operation to flush any break-in particles. Subsequent oil changes are recommended every 4,000 operating hours. Always ensure the housing retains a sufficient oil level — check the oil sight glass or dipstick regularly.
Can the GBC-NRV gearbox be mounted in any orientation?
The GBC-NRV supports multiple mounting positions — foot mount, flange mount, and torque-arm mount — and can operate in horizontal, vertical, or inverted orientations. However, different positions may require adjustments to oil fill level and breather plug location. Please consult the installation manual or contact us for guidance on non-standard mounting.
What Our Customers Say
⭐⭐⭐⭐⭐
"We replaced our previous supplier's worm reducers with GBC-NRV075 units on 12 conveyor lines. After 14 months of continuous three-shift operation, not a single unit has required maintenance beyond scheduled oil changes. The self-locking feature also let us eliminate separate brake modules, saving roughly $180 per conveyor."
— Marco R., Production Engineer
Packaging Equipment Manufacturer · Italy
⭐⭐⭐⭐⭐
"Lead time was surprisingly fast — our first order of 50 NRV050 gearboxes arrived at our warehouse in São Paulo in just 18 days door to door. Dimensionally they were a perfect drop-in replacement for the European brand we had been buying at nearly double the cost. Very satisfied."
— Luciana T., Procurement Manager
Food Processing Machinery Supplier · Brazil
⭐⭐⭐⭐⭐
"We needed a custom double-input-shaft version of the NRV090 for a textile tensioning application. HZPT's engineering team delivered working samples in three weeks and helped us optimise the ratio selection. Communication was excellent throughout — replied within hours every time."
— Ahmed K., Mechanical Design Lead
Textile Machinery OEM · Turkey
Related & Complementary Products
⚙️ GBC-NMRV Flange Input Worm Gearbox
The flange-input counterpart to the NRV series — mounts directly to IEC-standard motors for a plug-and-play drive solution.
🔄 UDL Series Mechanical Speed Variator
Stepless variable speed drive that pairs seamlessly with NMRV/NRV gearboxes for infinitely adjustable output speed without electronics.
⚡ Three-Phase AC Induction Motors
IEC-standard electric motors from 0.12 kW to 7.5 kW, available for direct coupling with GBC-NRV and GBC-NMRV 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 application requirements and we will recommend the best GBC-NRV model, ratio, and configuration for your project.
Warranty: 12 months | Shipping: Worldwide
The GBC-NRV Shaft Input Worm Gearbox is a high-efficiency, compact speed reducer engineered for demanding industrial applications. Available in ten frame sizes (NRV025–NRV150) with gear ratios from 7.5:1 to 100:1 and input power ranging from 0.12 kW to 7.5 kW, this worm gear reducer delivers reliable torque conversion for conveyors, packaging lines, food processing machinery, and automated production systems. Its die-cast iron housing, tin-bronze worm gear, and carburized 20CrMnTi worm shaft ensure exceptional durability and long service life. The built-in self-locking function eliminates the need for external braking devices, reducing system cost and complexity. IP55-rated and ISO 9001:2015 certified, the GBC-NRV gearbox is a trusted choice for OEMs and system integrators worldwide. Contact us today for competitive bulk pricing and fast delivery.
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