Precision Machining Tolerances
Review the linear dimensions and reamed hole tolerances applicable to precision machined parts adhering to ISO 2768
| Permissible deviations ranges in nominal lengths | Aluminum F (fine) | Hard Metals F (fine) | Plastics F (FINE) |
|---|---|---|---|
| 0.019 in. (0.5mm) up to 0.118 in. (3mm) | ±0.002 in. (±0.05 mm) | ±0.002 in. (±0.05 mm) | ±0.002 in. (±0.05 mm) |
| Over 0.118 in. (3mm) up to 0.236 in. (6mm) | ±0.002 in. (±0.05 mm) | ±0.002 in. (±0.05 mm) | ±0.002 in. (±0.05 mm) |
| Over 0.236 in. (6mm) up to 1.18 in. (30mm) | ±0.004 in. (±0.10 mm) | ±0.004 in. (±0.10 mm) | ±0.004 in. (±0.10 mm) |
| Over 1.18 in. (30mm) up to 4.72 in. (120mm) | ±0.006 in.(±0.15 mm) | ±0.006 in. (±0.15 mm) | ±0.006 in. (±0.15 mm) |
| Over 4.72 in. (120mm) up to 15.74 in. (400mm) | ±0.008 in. (±0.20 mm) | ±0.008 in. (±0.20 mm) | ±0.008 in. (±0.20 mm) |
| Over 15.74 in. (400mm) | ±0.012 in. (±0.30 mm) | ±0.012 in. (±0.30 mm) | ±0.012 in. (±0.30 mm) |
| Aluminum | Hard Metals | Plastics | |
|---|---|---|---|
| Hole Diameter +/- | 0.005 in. (0.12mm) | 0.005 in. (0.12mm) | 0.005 in. (0.12mm) |
| Hole Depth +/- | 0.005 in. (0.12mm) | 0.005 in. (0.12mm) | 0.010 in. (0.25mm) |
Tighter tolerances available: if tolerances tighter than ISO-2768 are needed for holes or other features, it can be requested when building a quote through myRapid or the Protolabs Network. These tolerances must be specified in a technical drawing in order to indicate exactly which features need the specified tolerances.