Material | Internal hardness | Heat treatment |
20cr | HRC60° ±2° | Nitriding |
Size | d | d1 | D | H | ||
Size | Tolerances | Size | Tolerances | |||
12 | 12 | -0.018 -0.01 | 20 | +0.020 +0.010 | 25 | 6 |
16 | 16 | 25 | 30 | |||
20 | 20 | -0.020 -0.010 | 30 | +0.025 +0.015 | 35 | 8 |
25 | 25 | 35 | 40 | |||
30 | 30 | 42 | 47 | 10 | ||
35 | 35 | -0.025 -0.015 | 48 | +0.030 +0.018 | 53 | |
40 | 40 | 55 | 60 | |||
45 | 45 | 60 | 65 | |||
50 | 50 | 70 | 76 | 12 | ||
55 | 55 | 75 | 81 | |||
60 | 60 | -0.035 -0.020 | 80 | +0.035 +0.020 | 86 | 16 |
70 | 70 | 90 | 96 | |||
80 | 80 | 05 | 110 | |||
90 | 90 | 115 | 120 | |||
100 | 100 | 130 | 135 |