High power density
Energy efficient
Flexibility, many sizes, few mechanical interfaces
Insensitive to chock loads
No vibrations i.e. no flow pulsation 100% constant displacement, the symmetrical design allows forces to be balanced- radial forces oppose each other and no centrifugal forces due to the rotation
Trough hole diameter 45 mm
Small footprint (total occupied volume)

Bosch Rexroth‘s hydraulic industrial motor Hägglunds CAb is of radial-piston type with a rotating cylinder block/hollow shaft and a stationary housing. The cylinder block is mounted in fixed roller bearings in the housing. An even number of pistons are radially located in bores inside the cylinder block, and the distributor directs the incoming and outgoing oil to and from the working pistons. Each piston is working against a cam roller.

When the hydraulic pressure is acting on the pistons, the cam rollers are pushed against the slope on the cam ring that is rigidly connected to the housing, thereby producing a torque. The cam rollers transfer the reaction force to the pistons which are guided in the cylinder block. Rotation therefore occurs, and the pressure in the system is proportional to the required torque.

Oil main lines are connected to ports A and C in the connection block and drain lines to ports D1, D2 and D3 in the motor housing.

The motor is connected to the shaft of the driven machine shaft through the hollow shaft of the cylinder block. The torque is transmitted by splines.

Parameter Name	Parameter Value
Technology	radial piston
Other characteristics	industrial low-speed with groove
Pressure	350 bar (5,076 psi)
Rotational speed (rpm)	400 - 400
Displacement	Min.: 503 cm³ (17.01 US fl oz)Max.: 2,513 cm³ (84.97 US fl oz)