NMRV-F Worm Gearbox – Flange-Mounted Motor Drive Unit

The NMRV-F Worm Gearbox is a flange-mounted speed reducer engineered for compact motor integration, direct mounting, and high torque transmission. Designed with an integrated motor flange input, it allows quick coupling with IEC or NEMA motors, reducing assembly time and simplifying mechanical alignment.

Crafted from lightweight yet durable aluminum alloy, the NMRV-F series is optimized for applications where space-saving, corrosion resistance, and quiet operation are critical. This makes it a preferred solution in conveyor systems, packaging lines, robotics, and food processing machinery where reliability and efficiency are essential.

Whether for OEM integration or industrial upgrades, this gearbox combines smooth performance, maintenance-free design, and versatile mounting to meet modern automation demands.

NMRV-F Worm Gearbox Specification:

Series:	EP-NMRV-F worm gearbox
Housing:	die-cast aluminum alloy(EP-NMRV025-090),  cast iron(EP-NMRV110-150)
Paint:	Aluminum alloy housing: shot blasting and special antiseptic treatment, phosphating
Worm wheel:	Special wearable nickel bronze alloy
Worm:	20Cr steel, carburization, and nitriding treatment
Output forms:	With output shaft, extension worm shaft, torque arm, output flange
Type:	EP-NMRV /  EP-NRV
Model:	EP-NMRV/EP-NRV 25/30/40/50/63/75/90/110/130/150/185
Reduction Ratio:	5,7.5,10,15,20,25,30,40,50,60,80,100
Flange:	FA / FB or as per your demands
Matching Motor:	0.06KW~15KW
Material:	Die-casting Aluminum Alloy
Color:	Blue /Silver Grey /Customized
Flange Standard:	PAM / IEC
Accessories:	Shaft, Flange, Torque arm, etc
Lubricant:	Synthetic Oil or Worm Gear Oil
Usage:	The machinery of foodstuff, ceramics, chemical, packing, dyeing, woodworking, glass industries, etc
Note: 1) please choose from the above specifications. 2) If the above options can not meet your demands, please send us your requirements(ratio, flange, mounting, application, or a picture of your old one), and we will recommend you a suitable type.

NMRV-F Worm Gearbox Output Flange Dimensions:

Key Features & Benefits:

• Motor Flange Input (IEC/NEMA Compatible): Allows direct connection to standard electric motors, streamlining installation.
• Aluminum Alloy Housing: Offers excellent heat dissipation and corrosion resistance, ideal for wet or dusty environments.
• Compact Hollow Shaft Output: Saves space and simplifies the mechanical layout.
• Maintenance-Free Operation: Sealed and pre-lubricated with long-life synthetic gear oil.
• Low Noise, Smooth Running: Perfect for use in indoor or low-vibration machinery.
• Flexible Mounting Positions: Can be mounted horizontally, vertically, or even wall-mounted without performance loss.
• Broad Ratio Range: Gear ratios from 7.5:1 up to 100:1, supporting various torque-speed configurations.

Available Configurations:

• NMRV-F Standard – Flange input with hollow output shaft
• NMRV-F + PC Pre-stage – Helical gear pre-stage for improved torque
• NMRV-F Double Stage – Combined with NMRV or RV worm gearbox for ultra-low output speed
• Customized Shaft Configurations – Left/right hollow output, double shaft, keyless shaft options

These flexible configurations ensure optimal performance for custom machinery or automation platforms.

Material & Design Excellence:

The NMRV-F is designed with a focus on efficiency, longevity, and compatibility:

• High-Precision Machined Worm Shaft: Made of hardened and ground steel for durability
• Bronze Worm Wheel: Ensures smooth contact and reduces gear wear
• Die-cast Aluminum Housing: Corrosion-resistant, lightweight, and efficient at dissipating heat
• Factory-Sealed with Synthetic Oil: No need for initial oil filling or regular maintenance
• Integrated Cooling Design: External fins dissipate heat for longer operating hours

Quality Assurance & Certifications:

Every NMRV-F worm gearbox is manufactured to meet strict international standards:

• ISO 9001:2015 Certified Production Line
• CE, RoHS Compliance (documentation available)
• 100% testing for:
  • Gear backlash and alignment
  • Torque output under load
  • Lubricant sealing and leak-proofing
  • Surface finish and dimension tolerances

Detailed inspection reports and datasheets are available upon request.

NMRV-F Worm Gearbox Applications:

The NMRV-F flange-mounted worm gearbox is widely used across industries thanks to its compactness, low maintenance, and torque capacity.

• Conveyor Systems: Flange mounting allows direct coupling with motor and pulley systems, streamlining setup for packaging and material handling.
• Food Processing & Packaging: Its aluminum body resists corrosion and is suitable for humid environments. Smooth, quiet motion is ideal for automated packing lines.
• Robotic Arms & Motion Platforms: Compact size and precise gear ratios allow for high-efficiency movement control.
• Industrial Mixers and Agitators: With high output torque and sealed lubrication, the NMRV-F performs well in mixer applications where hygiene and reliability are required.
• Textile and Printing Machinery: Low vibration and continuous-duty design help protect sensitive equipment and ensure consistent performance.

Customer Feedback of NMRV-F Worm Gearbox:

What Our Clients Say

"We standardized NMRV-F units across our packaging lines. The flange mount makes installation quick and tool-free. Very satisfied with the stability."
— Project Manager, Automation Firm (Italy)

"This gearbox is compact, efficient, and runs so quietly – a major upgrade over the bulky cast iron units we used before."
— Operations Lead, Food Industry (Mexico)

How to Choose the Right NMRV-F Model?

Choosing the correct gearbox ensures optimal machine performance and longevity. Here’s how:

1. Calculate Required Output Torque & Speed
   Know your load requirements and pick the ideal gear ratio to balance torque and RPM.
2. Confirm Motor Compatibility
   Ensure the gearbox flange matches your motor (IEC B5/B14 or NEMA). Check motor power (kW/HP) and RPM.
3. Assess Mounting Position & Space
   Choose the correct configuration (B3/B5/V5, etc.) based on available space and installation orientation.
4. Evaluate Operating Environment
   For high-humidity or corrosive areas, aluminum housing and optional coatings are suitable. Ensure protection class is adequate (IP rating).
5. Define Output Shaft Type & Orientation
   Select hollow or solid shaft, and confirm required dimensions or shaft key configurations.

Need help? Our engineers offer sizing support, CAD drawings, and custom design guidance.

Frequently Asked Questions (FAQs)

Q1: Is the NMRV suitable for vertical lifting?
A: Yes. Due to the self-locking property of worm gears, it's ideal for vertical loads.

Q2: What motors can I use with this gearbox?
A: It supports both IEC and NEMA motors using optional flanges.

Q3: Can I get a stainless steel version?
A: Yes. We offer corrosion-resistant and hygienic models for food-grade use.

Q4: What is the service life?
A: Typically 10,000+ hours with proper lubrication and operating conditions.

Q5: Do you offer customization for OEM brands?
A: Absolutely. We provide labeling, packaging, and ratio customization.

About Our Company:

With over 15 years of experience in power transmission, we specialize in designing, manufacturing, and supplying worm gear reducers, helical gearboxes, and motorized gear units to customers in more than 60 countries.

• 100% in-house engineering and assembly
• Fast response for OEM and bulk orders
• ISO-certified production
• Extensive application experience across industries

We’re more than a supplier – we’re your gearbox partner.