Technical Information
TOLERANCES
All of Milltech Martin Bright’s material comes with test certification. The majority of product is in the hardened and tempered state to condition “T” of the Australian Standards AS 1444-1996, but condition “R” through to “W” is available.
| BRIGHT BAR | ||||||
| TOLERANCE GRADE | ||||||
| Specified Diameter or Cross Sectional Dimension |
H7 | H8 | H9 | H10 | H11 | K12 |
| up to <=3 | +0, -0.010 | +0, -0.014 | +0, -0.025 | +0, -0.040 | +0, -0.060 | +0.100, -0 |
| >3 <=6 | +0, -0.012 | +0, -0.018 | +0, -0.030 | +0, -0.048 | +0, -0.075 | +0.120, -0 |
| >6 <=10 | +0, -0.015 | +0, -0.022 | +0, -0.036 | +0, -0.058 | +0, -0.090 | +0.150, -0 |
| >10 <=18 | +0, -0.018 | +0, -0.027 | +0,-0.043 | +0, -0.070 | +0, -0.110 | +0.180, -0 |
| >18 <=30 | +0,-0.021 | +0, -0.033 | +0, -0.052 | +0, -0.084 | +0, -0.130 | +0.210, -0 |
| >30 <=50 | +0, -0.025 | +0, -0.039 | +0, -0.062 | +0, -0.100 | +0, -0.160 | +0.250, -0 |
| >50 <=80 | +0, -0.030 | +0, -0.046 | +0, -0.074 | +0, -0.120 | +0, -0.190 | +0.300, -0 |
| >80 <=120 | +0, -0.035 | +0, -0.054 | +0, -0.087 | +0, -0.140 | +0, -0.220 | +0.350, -0 |
| >120 <=180 | +0, -0.040 | +0, -0.063 | +0, -0.100 | +0, -0.160 | +0, -0.250 | +0.400, -0 |
| >180 <=250 | +0, -0.046 | +0, -0.072 | +0, -0.115 | +0, -0.185 | +0, -0.290 | +0.460, -0 |
| >250 <=315 | +0, -0.052 | +0, -0.081 | +0, -0.130 | +0, -0.210 | +0, -0.320 | +0.520, -0 |
| BLACK BAR | ||
| DIAMETER/ ACROSS FLATS | PERMISSIBLE VARIATION FROM SPECIFIED SIZE | PERMISSIBLE OUT OF ROUND/SQUARE |
| Up to 25 | +0.25, -0.25 | 0.40 |
| >25 <=30 | +0.30, -0.30 | 0.45 |
| >30 <=40 | +0.40, -0.40 | 0.60 |
| >40 <=50 | +0.50, -0.50 | 0.75 |
| >50 <=60 | +0.60, -0.60 | 0.90 |
| >60 <=70 | +0.70, -0.70 | 1.05 |
| >70 <=80 | +0.80, -0.80 | 1.20 |
| >80 <=100 | +0.90, -0.90 | 1.35 |
| >100 <=125 | +3.20, …. | 3.20 |
| >125 <=170 | +4.80, …. | 4.80 |
| >170 <=215 | +6.40, …. | 6.40 |
TECHNICAL BROCHURES
Milltech provides a comprehensive Technical Handbook to assist customers in making the best use of our products. You can obtain a free copy for your personal use here.
