PC+NMRV Two-Stage Worm Gearbox Compact High-Torque Reducer

The PC+NMRV Two-Stage Worm Gearbox is a compact and highly efficient power transmission solution designed for applications that require high torque output, low speed, and space-saving design. This dual-stage configuration combines a pre-stage helical gearbox (PC unit) with an NMRV worm reducer, resulting in a reducer capable of achieving high gear reduction ratios in a compact footprint.

Engineered for reliability, quiet operation, and maintenance-free performance, the PC+NMRV unit is ideal for a wide range of light to medium industrial applications. The aluminum alloy housing ensures lightweight strength and excellent corrosion resistance, while the modular construction allows for flexibility in mounting, shaft configuration, and input types.

PC+NMRV Worm Gearbox Dimensions:

Available Models & Ratios

Key Features of PC+NMRV Worm Gearbox:

Two-Stage Reduction for Extreme Torque

By integrating a helical pre-stage (PC) with a worm gear (NMRV), this gearbox delivers exceptional torque at very low output speeds—ideal for demanding applications without the bulk of planetary systems.

Compact and Lightweight

Constructed from high-strength aluminum alloy, the reducer offers an impressive performance-to-weight ratio, making it easy to install in confined spaces or mobile machinery.

Silent & Smooth Operation

The combination of ground helical gears and precision-machined worm profiles ensures quiet, vibration-free operation—perfect for indoor, food-grade, or automated environments.

Modular Design with Multiple Inputs

Whether your system requires a shaft input, IEC motor flange, or servo motor adapter, the PC+NMRV series accommodates flexible input types with quick installation.

Maintenance-Free with Sealed Lubrication

Factory-sealed with synthetic gear oil, this gearbox requires no routine maintenance, offering long service life and reduced downtime.

High Corrosion Resistance

Anodized aluminum housing combined with powder coating ensures excellent performance in humid or chemically exposed environments.

Applications of PC+NMRV Worm Gearbox:

The PC+NMRV gearbox is engineered for precision and endurance across a wide range of industries:

• Packaging Machinery
  Accurate, slow-speed motion for fillers, wrappers, and labelers.

• Food Processing Equipment
  Lightweight and corrosion-resistant construction for washdown-safe use.

• Conveyor Systems
  Delivers high torque for incline conveyors and indexing operations.

• Automation & Robotics
  Quiet, compact drives for pick-and-place systems and linear actuators.

• Printing & Labeling Systems
  Precise synchronization of rollers and spools.

• Textile Machinery
  Reliable low-speed power for spinning, knitting, or weaving equipment.

• Medical & Laboratory Equipment
  Smooth, silent motion for sensitive environments.

• Solar Trackers & Actuators
  Durable, maintenance-free units for outdoor adjustment systems.

PC+NMRV Worm Gearbox Lubrication:

PC+NMRV Worm Gearbox Mounting Position:

PC+NMRV Worm Gearbox Combinations:

PC+EP-NMRV Worm Gearbox Model & Marker: 

Installation Guide of PC+NMRV Worm Gearbox:

Step 1: Verify Compatibility

• Confirm that gearbox size, input type, and mounting orientation match your design.

• Inspect the unit for shipping damage or contamination.

Step 2: Mounting the PC Pre-Stage

• Use a vibration-free, flat surface to mount the PC unit.

• Align the motor shaft with the PC input shaft or flange.

• Secure the PC unit using appropriate grade bolts (8.8 or higher).

• Ensure motor direction matches the required output rotation.

Step 3: Mounting the NMRV Unit

• The NMRV module connects directly to the PC unit via a precision-milled flange.

• Insert and lock the NMRV hollow shaft onto the driven shaft or use a torque arm.

• Ensure keys and retaining rings are properly installed.

• Confirm that no misalignment occurs during connection.

Step 4: Ventilation & Lubrication

• Remove transport plugs and replace with supplied breather vents.

• Ensure the cooling fins are unobstructed.

• No need to add oil—unit is pre-lubricated for life.

Step 5: Electrical Hook-up (If Motorized)

• Properly ground and align motor wiring.

• Use a soft starter or VFD for variable control.

• Perform a manual rotation test to ensure smooth operation.

Step 6: Final Inspection

• Check for vibration or unusual noise at startup.

• Tighten all bolts and locking mechanisms after 100 hours of use.

Customer Testimonials

“We switched to PC+NMRV gearboxes for our automated packaging line and saw immediate improvements in noise reduction and torque capacity. Very happy with the performance!”
— Paul R., Automation Engineer, Netherlands

Compact design, great price-performance ratio. Fits easily into our stainless enclosures without overheating. Will buy again.”
— Lisa M., Equipment Designer, Germany

“We needed high reduction with limited space in our conveyors. This dual-stage solution gave us exactly that, with zero maintenance so far after 14 months.”
— Zhang Wei, Plant Supervisor, China

Frequently Asked Questions (FAQ)

Q1: What is the advantage of a two-stage gearbox over a single-stage?

A: A two-stage gearbox provides higher reduction ratios and torque output in a more compact space, without the bulk of planetary gearboxes.

Q2: Can I mount the gearbox vertically?

A: Yes, both the PC and NMRV units support vertical (V5, V6) and horizontal (B3, B5) mounting. Ensure oil plugs are correctly positioned for your mounting style.

Q3: Is the gearbox suitable for outdoor use?

A: Yes, with optional IP65 sealing and treated aluminum casing, it's ideal for moderate outdoor environments like solar trackers or automation arms.

Q4: How do I select the correct size and ratio?

A: Provide motor specifications, load requirements, and output speed/torque. Our engineers will assist with selection and CAD models.

Q5: Can I get custom shaft dimensions?

A: Yes, we offer OEM shaft customization, flange adapters, and special keyways upon request.

Company Introduction:

Ever-Power Transmission Group is a global supplier of power transmission products, specializing in worm gearboxes, helical gear reducers, couplings, gear motors, and related solutions.

Why Ever-Power?

• ✅ 15+ Years of Manufacturing Experience

• ✅ ISO 9001:2015 Certified Quality System

• ✅ Custom OEM/ODM Capability

• ✅ Global Logistics & Fast Delivery

• ✅ 24/7 Engineering Support

• ✅ CAD & Technical Documentation Support

We serve clients in over 60 countries across automation, packaging, food processing, and renewable energy sectors.