certific at e - NOC international

88 KRW
Bearing data
Toleranzen
Roller bearing tolerances ensure that roller bearings are interchangeable. DIN 620 specifies the values of dimension
and run tolerances. Bearings are mostly produced in the tolerance class PN, other tolerance classes are available
at request.
Tolerance symbols acc. to DIN ISO 1132, DIN 6200
Bore diameter
d Nominal dimension of bore diameter (theoretical small diameter of taper bore)
d s
d mp
d 1mp
Nominal dimension of bore diameter (theoretical small diameter of taper bore)
1. mean bore diameter; the average calculated from the maximum and minimum bore
diameter in a radial plane
2. mean theoretical smaller diameter of taper bore; the average calculated from
the maximum and minimum bore diameter
mean theoretical larger diameter of taper bore; the average calculated from the
maximum and minimum bore diameter
∆ dmp = d mp - d Deviation between mean bore diameter and nominal dimension
∆ ds = d s - d Deviation between a defined bore diameter and nominal dimension
∆ d1mp = d 1mp - d Deviation between the mean larger diameter of taper bore and nominal dimension
V dp
Variation of bore diameter; difference between the maximum and minimum bore diameter
in a radial plane
Vdmp2 = d mpmax - d dmpmin
Variation of mean bore diameter; difference between the maximum
and minimum mean bore diameter
Outer diameter
D Nominal dimension of outer diameter
D s
D mp
Outer diameter measured at a defined point
Mean outer diameter; the average calculated from the maximum and minimum bore
diameter measured in a radial plane.
∆ Dmp = D mp - D Deviation of mean outer bore diameter from nominal dimension
∆ Ds = D s - D Deviation of a defined bore diameter from nominal dimension
V Dp
Variation of outer diameter; difference between the maximum and minimum outer bore diameter
measured in a radial plane
VDmp = D mpmax - D Dmpmin
Variation of mean outer bore diameter; difference between
the maximum and minimum mean outer bore diameter
Width and height
Bs , C s Width measured at a point of the inner ring/shaft washer or the outer ring/body washer
∆Bs = Bs - B ∆Cs = Cs - C Deviation of the inner ring or outer ring width measured at a defined
point from nominal size
VBs = B smax - B Bsmin
, VCs = C smax - C Csmin
Variation of inner or outer ring width; Difference between maximum
and minimum ring width measured
T s Single overall width of a tapered roller bearing
∆Ts = T s - T Deviation of a single overall width of a tapered roller bearing from nominal dimension
Concentricity
Kia Run-out of inner ring inside the assembled radial bearing (radial run-out)
K ea Run-out of outer ring inside the assembled radial bearing (radial run-out)
Axial run-out between inner ring side face and bore (lateral run-out)
S d
S D
S ia
S ea
S i
S e
Variation between circumferential line angle and lateral reference surface (lateral run-out)
Axial run-out between inner ring side face and assembled radial bearing (axial run-out)
Axial run-out between outer ring side face and assembled radial bearing (axial run-out)
Wall thickness variation of axial bearing shaft washers (axial run-out)
Wall thickness variation of axial bearing body washers (axial run-out)