Italian
UK French Flag German Flag Spanish

DIN 5401 JAN 1978 (Superseded Nov 1993)

Class Diameter (Nominal Dimension) (mm) Gauge Allowance (µm) Tolerance in Each Grade (µm) Mean allowances in Each Grade (um) Permissible Geometric Deviation (µm)
I Up to 10 ±10,2 0,5 -10 ... -1,5 -1 -0,5 0 +0,5 +1 +1,5 ... +10 0,25
II Up to 25 ±10,5 1 -10 ... -3 -2 -1 0 +1 +2 +3 ... +10 +,5
Up to 25 ±11 2 -10 -8 -6 -4 -2 0 +2 +4 +6 +8 +10 1
Over 25 to 50 ±13,5 3 -12 -9 -6 -3 0 +3 +6 +9 +12 1,5
III Over 50 to 75 ±14 4 -12 -8 -4 0 +4 +8 +12 2
Over 75 to 100 ±17,5 5 -15 -10 -5 0 +5 +10 +15 2,5
Over 100 to 125 ±21 6 -18 -12 -6 0 +6 +12 +18 3
Over 125 to 150 ±24,5 7 -21 -14 -7 0 +7 +14 +21 3,5
IV Up to 10 ±14 4 -12 -8 -4 0 +4 +8 +12 2
Up to 25 ±75 50 -50 0 +50 25
Over 25 to 50 ±113 75 -75 0 +75 38
Over 50 to 75 ±150 100 -100 0 +100 50
V Over 75 to 100 ±188 125 -125 0 +125 63
Over 100 to 125 ±225 150 -150 0 +150 75
Over 125 to 150 ±263 175 -175 0 +175 88
VI ±200 400 0
VII 0

 

Correction Factor for Different Materials

For balls, unhardened, in rolling bearing steel
10 times
balls, unhardened, in Stainless Steel
10 times
balls, hardened, in Stainless Steel
2 times
balls in bronze and brass
10 times