Machining allowances
The standards allow tolerances and surface defects in the dimensions. In order to obtain a flawless surface, we recommend the following allowances for round steel:
| Diameter range of the finished dimension | Machining allowances in mm for hot-rolled bars raw | Machining allowances in mm for forged bars raw |
| 6 - 16mm | 2mm | |
| 17 - 25mm | 3mm | |
| 16 - 63mm | 4mm | |
| 64 - 80mm | 5mm | |
| 81-100mm | 6mm | |
| 101-125mm | 7mm | 10mm |
| 126-160mm | 9mm | 12mm |
| 161-200mm | 11mm | 14mm |
| 201-250mm | 13mm | 17mm |
| 251-315mm | 16mm | 21mm |