Alloy composition=iron
Suitable for high speed and low load.
Possibility of solid lubricant (graphite or MoS2).
Good friction factor. Silent working. Reduced tolerances.
Recommended shafts tolerances: h7/j7
Recommended seat tolerances: H7
Standard tolerances for iron bushings:
CYLINDRICAL BUSHINGS
i.d. 3-79mm = i.d. E7-o.d. r7-H Js13-concentricity IT9
i.d. ≥80mm = i.d. E7-o.d. r8-H Js13-concentricity IT10
FLANGED BUSHINGS
i.d. 3-49mm = i.d. E7-o.d. r7-H Js13-concentricity IT9
i.d. ≥50mm = i.d. E7-o.d. r8-H Js13-concentricity IT10