Alloy composition=steel/ porous bronze/ acetal resin with pockets
Absence of electrostatic charges.
Low friction factor.
Better performances.
With cast iron or steel shaft and use of grease.
Recommended shafts tolerances: 3-4=h6 5-75=f7 80-300=h8
Recommended seat tolerances: 3-4=H6 5-300=H7