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Series 549 HSS High Helix (Parabolic Flute) Jobber Drills
Metric
HSS GT100 jobber drills. For drilling in difficult conditions when swarf congestion prevents an adequate flow of coolant. For use in steel and cast iron having a hardness of up to 1000N/mm2. Not recommended for nickel-chrome steels or similar material. Nitrided lands/polished > 2.36mm dia
Manufactured to BS 328, DIN338RN.
| Flute Length | 101mm |
| Overall Length | 151mm |
| Web Thickness | Form A |
| Drill Diameter Tolerance | H8 |
| Shank Diameter Tolerance | F11 |
| Material | HSS |
| Cutting Direction | Right Hand |
| Helix Type | High Helix |
| MFR Part No. | 00549 012.800 |
| Series | 549 |
| Number of Flutes | 2 |
| Standards Met | DIN 338 | DIN 1412 |
| Drill Diameter Metric | 12.8mm |
| Point Angle | 130\u00b0 |
| Flute Type | Parabolic |
| Flute Construction | Ground flutes |
| Finish/Coating | Bright |
| Coolant Delivery | External |
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