BRO-MAS® CuZn25Al5*

Machined bronze plain bearing | Requires maintenance | DIN 1850 / ISO 4379

Bearing properties

  • BRO-MAS® is a plain bearing requiring maintenance, is suitable for operation in contaminated environments, has good corrosion resistance, and is insensitive to shock loads. Oil or grease lubrication is needed. Additional lubrication grooves or holes significantly reduce relubrication intervals and improve lubricant distribution.


  • CuZn25Al5 (Standardlegierung)

Product properties

  • Maintenance Maintenance required
  • Static load ≤ 200 N/mm²
  • Dynamic load ≤ 150 N/mm²
  • Sliding speed ≤ 10 m/s
  • Friction value 0,09 up to 0,15
  • Temperature strain -40 up to +300 °C
  • max. pv-value 1,8 N/mm² x m/s
  • Hardness 190 - 220 HB

Tolerance details

  • Housing ø H7
  • Bushing inner ø after mounting E7 / s6 (until 120 ø r6)
  • Shaft tolerance f7

Shaft material

  • The difference in hardness to the bearing should be at least 100 HB if possible hardened and ground, roughness ≤ Rz 6,3

Mounting advise

  • Housing Installation chamfer, approx. 1.5 mm x 15 to 45°
  • Shaft Installation chamfer, 5 mm x 15°, edges rounded.
  • Installation mandrel It is advisable to use a suitable press-in mandrel. It may be necessary to grease the outer surfaces during installation.

Range of application

  • Machine construction, construction machinery, agricultural machinery, crane construction, vehicle construction

* This bearing is available in other metal alloys. Please also refer to our data sheet with the comparative overview of material properties.