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Reduced Shank Drill Bits Metric
Description
| Diameter (mm) | 13 |
| Flute Length (mm) | 89 |
| Overall Length (mm) | 152 |
| Pack Quantity | 1 |
| Spindle Speed Stainless Steel RPM | 294 |
| Spindle Speed Tool Steel RPM | 441 |
| Spindle Speed Cast Iron RPM | 588 |
| Spindle Speed Malleable Iron RPM | 662 |
| Spindle Speed Med. Carbon Steel RPM | 735 |
| Spindle Speed Free Cutting Steel RPM | 1054 |
| Spindle Speed Aluminium/Brass RPM | 1495 |
| Spindle Speed Wood/Plastic RPM | 2230 |
| Feed per revolution mm | 0.25 |
BORDO REDUCED SHANK HSS DRILLS
118° notched point 30° helix
DRILL BIT SURFACE TREATMENT
Bordo reduced shank HSS drills are ground and then a black finish is achieved by steam tempering, a thermal process resulting in a porous tool coating. This surface aids chip flow and heat dissipation. The drill is then ground a second time to achieve a bright finish on the shank and cutting edges.