Motovario NMRV040 7.5:1 Worm Gearbox – 18mm Output Bore

The Motovario NMRV040 7.5:1 worm gearbox is designed for compact, reliable right-angle power transmission where higher output speed with moderate torque multiplication is required. This version features a 18mm hollow bore, robust sealing, and a die-cast aluminium housing suited to day-to-day industrial use.

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Gearbox Overview

The NMRV040 frame sits in Motovario’s compact worm gearbox range and is well suited to small conveyors, labelling machines, light automation systems, compact OEM machinery. In this 7.5:1 configuration it is normally selected where faster shaft speed and lighter reduction are preferred, while still keeping the simplicity and space-saving benefits of a compact 90° gearbox.

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Why Choose This Configuration?

Choose this version when you need the mechanical fit of a NMRV040 unit together with a 7.5:1 reduction and 18mm bore size. It is intended for applications where faster shaft speed and lighter reduction are preferred, without moving into a different gearbox size unnecessarily.

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Technical Details

Gearbox size: NMRV040
Gear ratio: 7.5:1
Output bore: 18mm hollow bore
Gearbox type: Worm gear reducer
Housing: Die-cast aluminium alloy housing
Finish: RAL 5010 blue epoxy-polyester coating
Lubrication: Supplied with synthetic ENI TELIUM VSF oil for life
Mounting positions: B3, B6, B7, B8, V5, V6
Recommended position: B3
Motor input options: 63B14 | 63B5 | 71B14 | 71B5
Typical applications: small conveyors, labelling machines, light automation systems, compact OEM machinery

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Internal Links & Compatible Options

Same gearbox size, nearby ratios: jump to the NMRV040 ratio that best suits your output speed and torque requirements.

Same gearbox size, different output bores: jump to the NMRV040 7.5:1 bore size that best matches your shaft.

More Motovario worm gearboxes: Browse all NMRV040 gearboxes Browse all worm gearboxes

Helpful calculators:
Gearbox Ratio & Speed Calculator |
Output Torque Calculator

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Frequently Asked Questions

What does a 7.5:1 worm gearbox do?

A 7.5:1 worm gearbox reduces motor speed and multiplies torque, giving slower and more controlled output for industrial machinery.

What is this NMRV040 gearbox commonly used for?

This gearbox is commonly used on small conveyors, labelling machines, light automation systems, compact OEM machinery, where compact right-angle transmission and dependable continuous-duty operation are important.

What mounting positions are available?

Motovario lists B3, B6, B7, B8, V5 and V6 mounting positions for these NMRV/NRV units, with B3 technically preferred for lower oil splash, better lubrication and less heating.

What lubricant is supplied as standard?

These units are supplied with synthetic ENI TELIUM VSF lubricant for life under standard conditions.

What material is the housing made from?

Sizes up to 110 use die-cast aluminium alloy housings, while sizes 130 and 150 use grey cast iron housings.