Page 286 - Mold Bases & Plates 2020

Technical Reference
293

Tables for Determining Metric Tolerances

Table 8: Tolerances for inside dimensions (holes)

Table 8 details tolerances for inside dimensions (holes) based relative to the tolerance symbol. This table works the same way
as Table 6, but is pulled from a different source (ANSI standards) and details S7 and U7 fits. Pick the nominal size value that is
closest to the desired nominal size to determine the required tolerance range relative to the chosen tolerance symbol.

hole basis fiT [mm] hole:
example: nominal size: 60 [mm]
size range to be used: 50 to 65 h7 +0.030 (0.030mm range)
IsO-Grade no.: It7 (hole), It6 (shaft) 60 -0
tolerance symbol: h7/k6 shaft:
Desired Fit: locational transition Fit [mm]
this Gives: Allowance for hole: 0.030mm k6 +0.021 (0.019mm range)
Allowance for shaft: 0.019mm 60 +0.002

ToleranCes for inside dimensions (holes) (uniTs in 0.001mm)
piCk ClosesT value To desired piCk ClosesT value To desired
dimension (uniTs in mm) s7 u7 dimension (uniTs in mm) s7 u7
-14 -18 -27 -40
1 -24 -28 25 -48 -61
-14 -18 -27 -40
1.2 -24 -28 30 -48 -61
-14 -18 -34 -51
1.6 40
-24 -28 -59 -76
2 -14 -18 50 -34 -61
-24 -28 -59 -86
2.5 -14 -18 60 -42 -76 Technical Reference | Tables for Determining Metric Tolerances
-24 -28 -72 -106
-14 -18 80 -48 -121
-91
3
nominal size range 4 5 -15 -19 100 -101 -111
-78
-28
-24
-58
-93
-31
-146
-27
-15
-19
-131
-66
120
-166
-31
-27
-85
-31
-27
-215
-105
-17
-219
-22
8 6 -15 -19 160 -125 -175
200
-32 -37 -151 -265
-17 -22 -123 -267
10 -32 -37 250 -169 -313
-21 -26 -150 -330
12 -39 -44 300 -202 -382
-21 -26 -187 -414
16 400
-39 -44 -244 -471
20 -27 -33 500 -229 -517
-48 -54 -292 -580
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