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HIS Shaft Mounted Gearbox Unit (SMGU)

We have the sole UK distributorship for the old ‘Powerdrive’ & ‘PIX’ designed shaft mounted gearbox, covered by our brand name of HIS. It remains a popular gearbox in heavy plant machinery.

From stock we carry SMGU’s in both keyed hub and keyless (better known as taper grip) options. Both ranges are available in 11 sizes with normal ratios of 5:1, 13:1 & 20:1. Special sizes are available to manufacture on request.

Our taper grip and support bushes in our keyless range are made from stainless steel to prevent fretting, corrosion and help to have easy removal, even after being fitted for years!

Both ranges are available in metric and imperial bore sizes along with, offering the best performance and reliability through the innovation and changes that we have added to the manufacturing since taking the production under our brand HIS.

Shaft Mounted Gearbox available from Howcroft Industrial Supplies

Here are some of the changes we have made:

    All our units have 25° not 20° pressure angled hardened ground gears offering 8-10% higher power rating

    All our units are fitted with Labyrinth seals that increase oilseal life by 30%

    All our hubs and pinions are ground to close tolerances

    All our gearings are carburized hardened, ground and crack tested

    All our units have a special one-way breather plug

    All are fitted with SKF and FAG bearings which have been upgraded to double row from single row from size F upwards, preventing bearing failure

    All our bearings are protected by shims, preventing failure from backstop debris

Shaft Mounted Speed Reducers from Howcroft Indutrial Supplies

In addition to our more robust range above, we do offer the T-Series which is our round Shaft Mounted Speed Reducer. This unit is only available in D, E, F and G sizes with 5:1, 13:1, 15:1 & 20:1 ratios with torque ratings from upto 3000Nm.

The T-Series of round Shaft Mounted Speed Reducers offer a wider range of final speed ratios achieved through various pulley combinations, along with easy and quick methods of adjustment of V-Belts by the means of a turnbuckle.