Bearing in radial piston machines

Sector: Construction machines, hydraulics

1 Piston
2 Roller
3 KS PERMAGLIDE® half-shell plain bearings
Product used:
Radial piston machines are used in construction machines for crane rotation, for example. Radial piston engines generate very high torques at low speeds. It's a straightforward principle: the pistons are moved radially by hydraulics. Rollers transfer the radial force to a cam track, thereby transforming it into a rotary motion.
Roller bearing in radial piston machines with KS PERMAGLIDE® P23 / P203 half-shell plain bearings
The rollers are supported in half-shells made from the KS PERMAGLIDE® P23 / P203 material. The sliding shells have a smooth surface and support the rollers in the piston base. They are subject to extremely high pressure while only mixed friction is present. The working fluid is hydraulic oil.
Advantage: reliable function of the bearing with KS PERMAGLIDE® P23/P203 plain bearings
  • Smooth sliding surface, ready to install
  • Low wear
  • Insensitive to edge loads
  • Good damping characteristics
  • Insensitive to impact loads
  • Good chemical resistance
  • Leaded (P23) or unleaded (P203)


P23 and P203 are special sliding materials offering high performance. They are designed for low-maintenance grease or liquid-lubricated applications.
Materials P23 and P203 have smooth sliding surfaces and can also be used in hydrodynamic conditions.
Materials P23 and P203 are available on request.
Information about the products