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Bellhousing for hydraulic pumps
Bellhousing/Coupling to 225 Frame

Bellhousings, aluminium and steel drive couplings and accessories.

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Bellhousing with built in cooler
Cooler Bellhousing

Bellhousing with built in cooler matrix, fits motors up to 4kW.

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Large one piece bellhousing
Large Bellhousing to 355 Frame

One Piece cast aluminium for large drive applications.

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Bellhousings are the component that forms the connection between a power source and a hydraulic pump. Typically constructed out of aluminium alloy, they work with standard flanges up to 270 kW and are available in two constructions:


Constructed out of a single piece


Made using several components:

  • – base bellhousing with flange
  • – base bellhousing with distance ring and flange

At Hydraproducts, we offer standard bellhousings up to 225 frame and large bellhousing to 355 frame which is suitable for marine and offshore applications. Some useful points to consider when sizing up your bellhousing are listed below:

  1. In order to make sure you select the right size bellhousing for your hydraulic power unit, you should first calculate the sum of the motor and pump shafts, remembering to take into account the thickness of the rubber spider or the dimensions of the polyamid ring attached to the coupling which must be compatible with your hydraulic motor and its power output.
  2. Referring to the Catalogue pdf above, refer to the correct bellhousing in Tables 1,2,3 or 4 making sure the calculation from point 1. is either equal or less than the dimensions of the bellhousing.
  3. Finally, Check the fixation points correspond with the pump and the bellhousing.

Drive Couplings are also typically manufactured from aluminium alloy. Used with a matching bellhousing they provide the connection between an electric motor with flange and a standard European spec 4 bolt gear pump with flange and a 1.8 taper shaft. They are compatible with electric motors ranging from D63 to D225 Frame fitments and power levels of up to 45Kw.

If you need any further information on our bellhousing and coupling ranges or advice on correct fitments, feel free to contact our experienced team on 01452 523352.

  • Why choose Hydraproducts as your component supplier?
  • Manufacturers

Hydraproducts has a large stock holding of components we are able to support irregular customer requirements. If you have regular needs then we are happy to hold bonded stock to smooth out production/supply fluctuations.

Supporting our customers with the comfort that our engineers have been using these components to build hydraulic systems in our own workshops for over 15 years. Our Technical Sales engineers can help and advise on product choice as well as identifiy and cross reference a wide variety of other hydraulic equipment manufacturers.

Key component suppliers

OMT - Based in Italy, OMT has become a world recognized manufacturer of Hydraulic components. A recent acquisition of Luen, Hydraulic cartridge Valve manufacturer, has strengthened the group within mobile and industrial markets.

OT - With a engineering pedigree in Italian gear pump manufacturing, this company produces some the of the finest Aluminium hydraulic Gear pumps available today. They are customer focused with a very reactive production philosophy.

TEC - Tec motors have become the largest reseller of AC induction motors in the UK. Hydraproducts has fitted the TEC (TECHTOP) motors to our power packs and power units for over 15 years, so we know the quality is well suited to this market palce.

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