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Used to produce a close tolerance surface finish by enlarging pre-drilled holes to a finished size. Manufactured from HSS with a 45 bevelled head. Manufactured to BS 328-4.
TOLERANCES (to H7):
Diameter: ~ up to 3.00. Tolerance: +0.008, -0.007.
Diameter: Over 3.00 ~ up to 6.00. Tolerance: +0.010, -0.005.
Diameter: Over 6.00 ~ up to 10.00. Tolerance: +0.012, -0.006.
Diameter: Over 10.00 ~ up to 18.00. Tolerance: +0.015, -0.008.
Diameter: Over 18.00 ~ up to 30.00. Tolerance: +0.017, -0.009.
Diameter: Over 30.00 ~ up to 50.00. Tolerance: +0.021, -0.012.
Diameter: Over 50.00 ~ up to 80.00. Tolerance: +0.025, -0.014.
Diameter: Over 80.00 ~ up to 120.00. Tolerance: +0.029, -0.016.
| Shank Type | Taper Shank |
| Finish/Coating | Steam Tempered |
| Length Type | Taper Shank |
| Reamer Type | Fixed |
| Diameter Tolerance | +0.015 to -0.008 |
| Reamer Diameter | 10.50mm |
| Standards Met | BS 122 | BS 328 |
| Flute Length | 66mm |
| Flute Type | Left Hand Spiral |
| Cutting Direction | Right Hand |
| Number of Flutes | 6 |
| Overall Length | 144mm |
| Taper Shank Size | 1 |
| Material | HSS |
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