Professional Plain Type M2 HSS Center Drill Bits with original color
1. Material: HSS 4341/9341/M2/M35
2. Finishing: Bright, Tin-Coated
3. Process: Fully Ground / Milled
4. Size: 1.0~10.0mm
5. Packaging: Paper Bag, Sealed Plastic Bag, Plastic Box, Set Package etc.
6. Metal, stainless steel drilling
Center drills are used with the lathe to drill a hole in the end of stock for mounting between centers in the lathe.
They are designed to drill a small diameter pilot hole followed by a 60 degree countersink that provides a bearing surface for the 60 degree point of the lathe center.
Center drill are also used extensively with the milling machine to accurately start holes.
The hole locations can be dialed in using the milling machine's calibrated hand wheels, then the hole is started using the center drill.
| HSS CENTER DRILL | HSS CENTER DRILL |
| BRIGHT FINISH Type: A | BRIGHT FINISH Type: B
|
| Size(mm) | Flute Length(mm) | Overall Length(mm) | Size(mm) | Flute Length(mm) | Overall Length(mm) |
| mm | mm | mm | mm | mm | mm |
| 0.5 | 0.8 | 20 | 1 | 1.3 | 35.5 |
| 0.8 | 1.1 | 22 | 1.25 | 1.6 | 40 |
| 1 | 1.3 | 31.5 | 1.6 | 2 | 45 |
| 1.3 | 1.6 | 31.5 | 2 | 2.5 | 50 |
| 1.6 | 2 | 35.5 | 2.5 | 3.1 | 56 |
| 2 | 2.5 | 40 | 3.15 | 3.9 | 60 |
| 2.5 | 3.1 | 45 | 4 | 5 | 67 |
| 3.2 | 3.9 | 50 | 5 | 6.3 | 75 |
| 4 | 5 | 56 | 6.3 | 8 | 80 |
| 5 | 6.3 | 63 | 8 | 10.1 | 100 |
| 6.3 | 8 | 71 | 10 | 12.8 | 125 |
| 8 | 10.1 | 80 | | | |
| 10 | 12.8 | 100 | | | |
| 12.5 | 16.5 | 125 | | |