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All Products ➞ Bordo ➞ Drills ➞ Jobber ➞ Black Finish HSS ➞ Metric Hang Sell
4.20mm Black HSS Jobber - Clam
| Part Number: | 2003-4.20S |
| Brand: | Bordo |
| Sub Brand: | Black Knight |
| Barcode: | 9326518179641 |
| Pack Qty: | 1 |
| Pack Type: | Hang Sell |
| Packaging: | Clam |
| Feed per revolution mm: | 0.12 |
| Spindle Speed Aluminium/Brass RPM: | 4626 |
| Spindle Speed Cast Iron RPM: | 1820 |
| Spindle Speed Free Cutting Steel RPM: | 3261 |
| Spindle Speed Malleable Iron RPM: | 2048 |
| Spindle Speed Med. Carbon Steel RPM: | 2275 |
| Spindle Speed Stainless Steel RPM: | 910 |
| Spindle Speed Tool Steel RPM: | 1365 |
| Spindle Speed Wood/Plastic RPM: | 6901 |
| Diameter (mm): | 4.20 |
| Flute Length (mm): | 43 |
| OAL (mm): | 75 |
About this item:
- 4.20mm Black HSS Twist - Clam
- Bordo Black Knight M2-HSS Twist Drills.
- DIN338
- 118° Split Point (crankshaft point)
- Split point is self centering and reduces the need for end thrust.
- Friction at workpiece is reduced.
- 118° point angles are ideal for use in materials such as mild steel and cast iron.
- The 118° point creates easily controlled chips which are wide and thin.
- Black Finish Twist Drills (also called blue finish) achieve their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating.
- This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding. The result is increased tool life.
- Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.