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CSUK Shaft Mounted Gear Units (SMGU) are manufactured as per international quality standards.

Providing speed reduction by directly mounting onto the drive shaft. Shaft Mounts Gearbox offer ease of installation and removal.

The Shaft Mounted Gear Units (SMGU) are offered with case carburized hardened and ground gear teeth with optimal gear geometry, allowing maximum loading and highest efficiency torque output, for higher rating capacity in the most compact design and robust casing.


SMGU is a standard product inter-changeable with leading international gearbox brands, which is known for its low cost maintenance and repair.


The product specifications and features are as follows:

Manufactured in 11 different sizes from A to L with Power Rating of upto 150 kW at 70 RPM
Multiple Bore Sizes per Size & Three Different Reduction Ratios - 5:1, 13:1 and 20:1
Redesigned Gearings for Higher Power to Weight Ratios
Metallic Double Lip Seals Preventing Oil Leakage and Locking Outside Dirt
Taper Clamp Shaft Mounted Gear Units – For Key-Less Applications
Numerous Accessories: Backstops, Labyrinth Seals, Reducing Bush Kits, Motor Mounts etc.
Drives for Hydraulic Motor Mounts with/without Splines available on request
All Units Tested Prior to Dispatch with Trace-ability of all Components
Consistency & Reliability in Performance Guaranteed in the Harshest of Conditions

Also known as Shaft Mount Speed Reducer (SMSR), they have very diverse use in material handling equipment and are widely used in industries such as cement, animal feed, sugar mills, coal, steel, stone crushing, quarrying and pharmaceutical plants etc.

SMGU Catalogue:

Discover the next generation of industrial power with the Howcroft Group's Shaft Mounted Gear Units (SMGU) by CSUK. This guide showcases our robust and reliable gear units, designed to deliver exceptional performance and efficiency for a wide range of industrial applications.

SMGU Installation Instructions:

This document is a comprehensive installation and service manual for Shaft Mounted Gear Units (SMGU) by Howcroft Group's ChainSupply™ brand. It provides detailed, step-by-step instructions for correct mounting and lubrication to ensure proper operation and a long service life.