德国钢球、钢珠质量标准

CLASS Nominal Dia.mm Tolerances (U) Tolerances Per group(U) Mean interval of each group (U) Spherical deviation
10Max ±10.25 0.5 -10~-1.5 -1 -0.5 0 +0.5 +1 +1.5~+10 0.25
25Max ±10.50 1 -10~-3 -2 -1 0 +1 +2 +3~+10 0.5
25Max ±11 2 -10 -8 -6 -4 -2 0 +2 +4 +6 +8 +10 1
25-50 ±13.5 3   -12 -9 -6 -3 0 +3 +6 +9 +12   1.5
59-75 ±14 4     -12 -8 -4 0 +4 +8 +12     2
75-100 ±17.5 5     -15 -10 -5 0 +5 +10 +15     2.5
100-125 ±21       -18 -12 -6 0 +6 +12 +18     3
125-150 ±24.5 7     -21 -14 -7 0 +7 +14 +21     3.5
10Max ±14 4     -12 -8 -4 0 +4 +8 +12     2
25Max ±75 50         -50 0 +50         25
25-50 ±113 75         -75 0 +75         38
50-70 ±150 100         -100 0 +100         50
75-100 ±188 125         -125 0 +125         63
100-125 ±225 150         -150 0 +150         75
125-150 ±263 175         -175 0 +175         88
  ±200 400