GBC-NMRV Aluminum Worm Gearbox — Flange Input Worm Gear Reducer with Output Flange

The GBC-NMRV Aluminum Worm Gearbox is a lightweight, high-efficiency flange-input worm gear reducer featuring a die-cast aluminum alloy housing for superior heat dissipation and corrosion resistance. Available in nine frame sizes (NMRV030–NMRV150) with gear ratios from 7.5:1 to 100:1 and input power from 0.06 kW to 15 kW, this gearbox mounts directly to IEC-standard AC, DC, and servo motors for plug-and-play integration. Its self-locking worm drive eliminates external braking devices, while Viton oil seals ensure leak-free, high-temperature operation. ISO 9001:2015 certified with CE and SGS approvals. Ideal for food processing machinery, automated packaging lines, conveyor systems, and industrial automation. Contact us today for competitive pricing and fast worldwide delivery.

The GBC-NMRV aluminum worm gearbox is a lightweight, high-performance worm reducer built around a precision-machined worm and tin-bronze worm gear set. Featuring an advanced square-box aluminum alloy housing, the GBC-NMRV delivers an outstanding strength-to-weight ratio, rapid heat dissipation, and a clean, modern appearance that integrates seamlessly into today's compact machine designs. Available in nine frame sizes from NMRV030 to NMRV150, with gear ratios spanning 7.5:1 to 100:1 and input power from 0.06 kW to 15 kW, this series covers everything from micro-motion actuators to heavy-duty conveyor drives.

What sets the GBC-NMRV apart is its flange-input design — an IEC-normalised motor mounting flange allows direct coupling to AC motors, DC motors, servo motors, and brake motors without the need for an external coupling or adapter bracket. This plug-and-play integration saves installation time, reduces alignment errors, and produces a more compact overall drive package. The gearbox is also available with solid shaft input and worm shaft tail extension input for non-motor-driven applications.

Every GBC-NMRV unit is manufactured under strict ISO 9001:2015 quality control, with Viton oil seals for superior high-temperature resistance and minimal leakage, and premium bearings from trusted brands. With a production capacity exceeding 15,000 units per month, we provide reliable supply for OEM manufacturers, system integrators, and distributors worldwide. Contact us for a free engineering consultation and competitive quotation.

GBC-NMRV Aluminum Worm Gearbox — lightweight flange-input worm gear reducer with square aluminum alloy housing and output flange

Technical Specifications

Parameter Details
Product Name GBC-NMRV Aluminum Worm Gearbox / Worm Gear Reducer with Output Flange
Available Models GBC-NMRV030, GBC-NMRV040, GBC-NMRV050, GBC-NMRV063, GBC-NMRV075, GBC-NMRV090, GBC-NMRV110, GBC-NMRV130, GBC-NMRV150
Input Configurations IEC-normalised Motor Flange · Solid Shaft Input · Worm Shaft Tail Extension · Direct Motor Coupling (AC / DC / Servo)
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 0.06 kW – 15 kW (higher ratings available on request)
Housing Material Die-cast aluminum alloy
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 — Viton oil seal for high-temperature resistance & anti-oxidation
Lubricant Synthetic or mineral oil
IEC Motor Flanges 56B14, 63B14, 63B5, 71B14, 80B14, etc.
Protection Rating IP55
Color Options Blue / Black / Grey (custom color on request)
Certifications ISO 9001:2015 · CE · SGS
Warranty 1 year
Packing Carton / Wooden pallet / Wooden case
Production Capacity 15,000 units / month

GBC-NMRV Worm Gearbox Structure Drawing

GBC-NMRV aluminum worm gearbox internal structure drawing showing worm shaft, worm gear, bearings, seals, and housing cross-section

Features & Benefits

✅ Lightweight Aluminum Alloy Housing

Up to 50% lighter than cast-iron alternatives, reducing structural load on your machine frame while delivering superior heat dissipation through the high thermal conductivity of aluminum.

✅ IEC Flange Motor Mounting — Plug & Play

Direct bolt-on connection to IEC-standard motors eliminates the need for couplings, motor brackets, or alignment procedures — cutting installation time and reducing potential vibration sources.

✅ Self-Locking Worm Drive

At higher reduction ratios, the worm mechanism prevents back-driving of the output shaft, eliminating the need for external braking devices and reducing overall system cost.

✅ Low Noise & Smooth Transmission

The tin-bronze gear meshing with the hardened steel worm produces exceptionally quiet operation, ideal for noise-sensitive environments such as food halls, laboratories, and packaging facilities.

✅ Viton Oil Seals

Premium Viton seals resist high temperatures up to 200 °C and provide excellent anti-oxidation properties, virtually eliminating oil leakage and extending maintenance intervals.

✅ Compact Square-Box Design

The square housing enables universal mounting in any orientation — foot, flange, or torque arm — and maximises space efficiency inside crowded machine enclosures.

✅ Flexible Output Options

Choose from keyed hollow shaft, output flange, single solid shaft, or double output shaft to match your driven equipment without costly mechanical adapters.

✅ Hardened 20CrMnTi Worm Shaft

Carburized and quenched alloy steel ensures high surface hardness, superior wear resistance, and consistent performance over millions of operating cycles.

GBC-NMRV aluminum worm gearbox close-up showing square housing, cooling fins, and IEC motor flange input

Applications — Where GBC-NMRV Worm Gearboxes Excel

The GBC-NMRV flange-input worm gear reducer is trusted across dozens of industries. Its lightweight aluminum housing, plug-and-play motor mounting, and wide ratio range make it a versatile building block for virtually any power transmission system requiring speed reduction and torque multiplication.

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Food & Beverage Processing

Conveyor belt systems, mixing machines, bottling lines, and bakery equipment where lightweight construction and hygienic operation are essential.

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Printing & Packaging Machinery

Label applicators, carton erectors, shrink wrappers, and automated packaging lines requiring precise speed control and rapid stop functionality.

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Industrial Automation & Robotics

Robotic arm joints, rotary indexing tables, pick-and-place units, and CNC auxiliary drives where compact size and backlash control matter.

Environmental Engineering

Wastewater treatment aerators, sludge scrapers, dredgers, and pollution control equipment exposed to moisture and chemicals.

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Textile Equipment

Spinning frames, looms, dyeing machines, and fabric winding systems where smooth, vibration-free power delivery protects delicate materials.

Electrical & Transport Equipment

Gate operators, rolling shutters, material handling trolleys, and small lifting devices where the aluminum housing's light weight reduces total system mass.

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Warehousing & Logistics

Automated storage and retrieval systems (AS/RS), sorting machines, and small conveyors in distribution centres.

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General Industrial Machinery

Agitators, mixers, ceramic kilns, tobacco equipment, and any application requiring a reliable, cost-effective speed reduction solution.

GBC-NMRV worm gearbox manufacturing facility — quality-controlled production line for aluminum worm gear reducers

GBC-NMRV Model Parameters

Model Rated Power Rated Ratio Input Hole Dia. Input Shaft Dia. Output Hole Dia. Output Shaft Dia.
GBC-NMRV030 0.06 – 0.25 kW 7.5 – 80 Φ9 (Φ11) Φ9 Φ14 Φ14
GBC-NMRV040 0.09 – 0.55 kW 7.5 – 100 Φ9 (Φ11, Φ14) Φ11 Φ18 (Φ19) Φ18
GBC-NMRV050 0.12 – 1.5 kW 7.5 – 100 Φ11 (Φ14, Φ19) Φ14 Φ25 (Φ24) Φ25
GBC-NMRV063 0.18 – 2.2 kW 7.5 – 100 Φ14 (Φ19, Φ24) Φ19 Φ25 (Φ28) Φ25
GBC-NMRV075 0.25 – 4.0 kW 7.5 – 100 Φ14 (Φ19, Φ24, Φ28) Φ24 Φ28 (Φ35) Φ28
GBC-NMRV090 0.37 – 4.0 kW 7.5 – 100 Φ19 (Φ24, Φ28) Φ24 Φ35 (Φ38) Φ35
GBC-NMRV110 0.55 – 7.5 kW 7.5 – 100 Φ19 (Φ24, Φ28, Φ38) Φ28 Φ42 Φ42
GBC-NMRV130 0.75 – 7.5 kW 7.5 – 100 Φ24 (Φ28, Φ38) Φ30 Φ45 Φ45
GBC-NMRV150 2.2 – 15 kW 7.5 – 100 Φ28 (Φ38, Φ42) Φ35 Φ50 Φ50

Dimensional Drawings & Mounting Positions

Below you will find the outline installation dimensions, mounting position diagrams, output flange dimensions, and torque arm details for the GBC-NMRV aluminum worm gearbox series.

Outline Installation Dimensions

GBC-NMRV aluminum worm gearbox outline installation size drawing with key mounting dimensions for models NMRV030 to NMRV150

Model A (mm) B (mm) C (mm) H (mm) H1 (mm) L (mm) L1 (mm) Weight (kg)
GBC-NMRV030 80 70 57 30 63 84 62 1.5
GBC-NMRV040 97 80 71 40 78 103 78 2.5
GBC-NMRV050 120 100 86 50 97 126 97 4.5
GBC-NMRV063 144 121 103 63 116 145 112 7.5
GBC-NMRV075 172 140 120 75 137 168 137 11
GBC-NMRV090 205 165 145 90 160 197 160 18
GBC-NMRV110 255 195 175 110 195 250 195 34
GBC-NMRV130 293 230 200 130 220 270 220 50
GBC-NMRV150 340 260 235 150 255 305 255 75

Mounting Positions

GBC-NMRV aluminum worm gearbox mounting position diagram — B3, B6, B7, B8, V5, V6 orientations

Output Flange Mounting Dimensions

GBC-NMRV worm gearbox output flange mounting dimensions with bolt circle diameter and pilot spigot specifications

Model DF (mm) D0 (mm) PCD (mm) b3 (mm) n × d
GBC-NMRV030 62 40 50 6 4 × Φ5.5
GBC-NMRV040 80 50 65 7 4 × Φ6.5
GBC-NMRV050 100 70 85 7.5 4 × Φ6.5
GBC-NMRV063 120 80 100 8 4 × Φ8.5
GBC-NMRV075 140 100 120 9 8 × Φ8.5
GBC-NMRV090 160 110 140 10 8 × Φ8.5
GBC-NMRV110 200 145 175 12 8 × Φ10.5
GBC-NMRV130 250 175 215 14 8 × Φ12.5
GBC-NMRV150 280 200 250 16 8 × Φ12.5

DF = Flange outer diameter · D0 = Pilot spigot diameter · PCD = Bolt circle diameter · b3 = Flange thickness · n × d = Number & diameter of bolt holes

Torque Arm Dimensions

GBC-NMRV aluminum worm gearbox torque arm accessory dimensional drawing

Model LA (mm) LB (mm) d (mm)
GBC-NMRV030 92 60 8
GBC-NMRV040 108 72 8
GBC-NMRV050 135 95 10
GBC-NMRV063 160 110 10
GBC-NMRV075 185 130 12
GBC-NMRV090 215 155 12
GBC-NMRV110 270 200 14
GBC-NMRV130 310 230 16
GBC-NMRV150 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 model.

Selection Guide — How to Choose the Right GBC-NMRV 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.

Step 2 — Select the Gear Ratio

Divide the motor speed by your desired output speed to get the required ratio. GBC-NMRV gearboxes are available in ratios from 7.5:1 to 100:1. For ratios exceeding 100:1, consider a double-stage combination such as NMRV + NMRV or NMRV + NRV.

Step 3 — Match the IEC Motor Flange

Verify that your motor's IEC flange code (e.g. 56B14, 71B14, 80B5) matches one of the available input flanges for your chosen GBC-NMRV frame size. Refer to the parameter table above for input hole diameters.

Step 4 — Choose Your Output Configuration

Determine whether your machine requires a keyed hollow shaft, an output flange, a single solid shaft, or a double output shaft. Each option is available across all frame sizes.

Step 5 — Consider Combination Options

GBC-NMRV gearboxes can be combined in various arrangements for higher ratios or special configurations: NMRV + NMRV double stage, NMRV + NRV, NMRV + PC pre-stage, NMRV + UDL variator, or direct NMRV + motor assembly.

GBC-NMRV Model Number Decoder

Code Meaning
GBC-NMRV Worm geared motor (flange input)
GBC-NRV Worm reduction unit (shaft input)
063 Centre distance (mm)
30 Reduction ratio
VS Double input shaft
F1 / FA Output flange
AS Single output shaft
AB Double output shaft
PAM / 80B5 Motor coupling / Motor mounting facility
0.75KW Electric motor power
B3 Mounting position

Example: GBC-NMRV-063-30-VS-F1-AS-80B5-0.75KW-B3 = Flange-input worm geared motor, 63 mm centre distance, 30:1 ratio, double input shaft, output flange + single solid shaft, 80B5 motor mount, 0.75 kW motor, B3 foot-mounted position.

Frequently Asked Questions

What is the difference between GBC-NMRV and GBC-NRV worm gearboxes?

GBC-NMRV models feature an IEC-standard flange input designed for direct motor mounting — simply bolt your motor onto the gearbox. GBC-NRV models use a solid shaft input for coupling to motors or driven equipment via couplings, belts, or chains. Internally, the worm gear mechanism, materials, and output options are identical.

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. 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, flanges)?

Yes. We routinely supply customised versions with non-standard shaft dimensions, special output 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. Send your technical drawing 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 can arrange sea freight, air freight, or express courier (DHL, FedEx, UPS) based on urgency and destination.

What warranty do you provide?

Every GBC-NMRV gearbox is backed by a 1-year warranty covering material and manufacturing defects under normal operating conditions. If a unit arrives damaged or develops a fault within the warranty period, we will either ship a replacement or provide a refund.

Why choose aluminum housing over cast iron?

Aluminum alloy housing is significantly lighter (up to 50% weight reduction), provides faster heat dissipation due to higher thermal conductivity, and offers natural corrosion resistance. It is ideal for applications where total system weight matters — such as robotic arms, mobile equipment, and overhead-mounted drives. For extremely heavy-duty or high-shock applications, our cast-iron GBC-NRV series may be more appropriate.

Can the GBC-NMRV gearbox be mounted in any orientation?

Yes. The GBC-NMRV supports universal mounting positions including B3 (foot), B5/B14 (flange), B6, B7, B8, V5, and V6. Different positions may require adjustments to oil fill level and breather plug location. Refer to the mounting position diagram above or contact us for guidance.

What Our Customers Say

⭐⭐⭐⭐⭐

"We switched from a European brand to GBC-NMRV063 units on 24 packaging lines. The aluminum housing cut the gearbox weight by nearly half, which made a real difference on our overhead-mounted applications. After 18 months of continuous operation, zero failures. Excellent value."

— Stefan M., Plant Engineer

Packaging Equipment OEM · Germany

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"The IEC flange input was a perfect drop-in replacement for our existing motor-gearbox setup. No adapter brackets, no alignment hassle. We ordered 100 GBC-NMRV050 units and they arrived in 12 days — faster than our domestic supplier. Very impressed with the Viton seals — no leaks at all."

— Rachel W., Procurement Lead

Conveyor Systems Integrator · Australia

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"We needed custom double-output-shaft NMRV090 gearboxes for a textile tensioning application. The engineering team responded the same day and delivered working samples in three weeks. Communication and quality have been consistently excellent over two years of partnership."

— Raj P., Mechanical Design Manager

Textile Machinery Manufacturer · India

Related & Complementary Products

⚙️ GBC-NRV Shaft Input Worm Gearbox

The shaft-input counterpart to the NMRV series — ideal for belt, chain, or coupling-driven applications where a direct motor flange is not required.

🔄 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 0.06 kW to 15 kW, available for direct flange mounting with 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 aluminum worm gearbox solution — our engineering and sales teams are ready to help. Tell us your application requirements and we will recommend the best GBC-NMRV model, ratio, and configuration for your project.

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 Warranty: 1 year  |  Shipping: Worldwide


The GBC-NMRV Aluminum Worm Gearbox is a lightweight, high-efficiency flange-input worm gear reducer featuring a die-cast aluminum alloy housing for superior heat dissipation and corrosion resistance. Available in nine frame sizes (NMRV030–NMRV150) with gear ratios from 7.5:1 to 100:1 and input power from 0.06 kW to 15 kW, this gearbox mounts directly to IEC-standard AC, DC, and servo motors for plug-and-play integration. Its self-locking worm drive eliminates external braking devices, while Viton oil seals ensure leak-free, high-temperature operation. ISO 9001:2015 certified with CE and SGS approvals. Ideal for food processing machinery, automated packaging lines, conveyor systems, and industrial automation. Contact us today for competitive pricing and fast worldwide delivery.

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