Splined Couplings

Flowfit supplies a wide range of splined couplings for hydraulic, agricultural, industrial, construction and mobile machinery applications. Designed to provide a secure connection between rotating components, splined couplings transmit torque between hydraulic pumps, motors, gearboxes, engines and other mechanical drive equipment.

Our range includes hydraulic pump splined couplings, splined half couplings, tapered couplings, cylindrical bore couplings and keyed splined couplings in a variety of pump groups, spline profiles, tooth counts and dimensions.

How Splined Couplings Work

A splined coupling connects an internally splined bore to a matching externally splined shaft. The corresponding teeth engage around the shaft, distributing the load across several contact points and creating a strong, compact drive connection.

For correct fitment, the spline standard, profile, tooth count and dimensions must match the mating shaft. Components with the same number of teeth may still be incompatible if they use a different module, pitch, tolerance or spline standard.

Pump and Motor Connections

Splined couplings are commonly used to connect hydraulic pumps and motors to engines, electric motors and gearboxes. Options may be available for Group 1, Group 2, Group 3 and larger hydraulic pump applications, as well as manufacturer-specific pumps and motors.

Some couplings use a tapered shaft connection, while others have a cylindrical or keyed bore. Not every coupling requires a keyway, so the connection type and dimensions should always be checked before ordering.

Common Applications

Splined couplings are widely used in:

• Hydraulic power packs
• Agricultural machinery
• Construction and plant equipment
• Industrial machinery
• Mobile hydraulic systems
• Material-handling equipment
• Gearboxes and drive assemblies
• Hydraulic pumps and motors

They are suitable for applications requiring reliable torque transmission between compatible rotating components.

Choosing the Correct Splined Coupling

When selecting a splined coupling, check the spline standard, spline profile, number of teeth, pump group, connection type, bore size, keyway size and overall dimensions.

If replacing an existing coupling, compare the original component markings and measurements with the product specification. It is also helpful to confirm the make and model of the pump, motor or gearbox.

Choosing the correct specification helps ensure secure engagement, reliable power transmission and reduced wear within the drive system.

Flowfit Splined Couplings

Flowfit understands that small differences in spline profile, bore design or dimensions can determine whether a coupling is suitable for your equipment. Our experienced team can assist with matching spline standards, tooth counts, pump groups, shaft connections and product dimensions to help you identify the correct component.

Call 01584 876 033 or email sales@flowfitonline.com for product selection advice, availability and delivery information.