certific at e - NOC international

Assembling roller bearings
Values for the shape and positio tolerances of the bearing seats
Tolerance class of
bearings
Bearing seat Manufacturing-
Tolerance
PN (Normal tolerance) Shaft IT 6 (IT 5) IT 4
2
Housing
Ø ≤ 150 mm
Housing
Ø > 150 mm
IT 6 (IT 7) IT 4
2
IT 7 (IT 6) IT 5
2
P6 Shaft IT 3
2
Housing IT 4
2
P5 Shaft IT 2
2
Housing IT 3
2
P4, SP Shaft IT 1
2
t 1
Housing IT 2
2
Cylindrical shape tolerance
t 2 Axial runout tolerance
Cylindrical shape tolerance Axial rnouttolerance
circumference load
t 1
IT3
2
IT 5
2
IT 4
2
IT 2
2
IT 3
2
point load t 1
IT 5
2
IT 5
2
IT 6
2
IT 4
2
IT 5
2
IT 3
2
IT 4
2
IT 4
2
IT 6
2
IT 5
2
IT 3
2
IT 4
2
t2
IT 4 (IT 3)
IT 4 (IT 5)
IT 5 (IT 4)
IT 3 (IT2)
IT 4 (IT 3)
IT 2
IT 3
IT 22 IT 1
IT 3
2
IT 2
KRW 135