Center Drill 5090
Sutable for centering or chamfering of workpiece surfaces.
Email: Edwintao2020@gmail.com
Tel: 008613912779581
A center drill is used for drilling a hole on the axis of a shaft to hold it between centers. It was also used to drill center holes on machining centers, but has been replaced by the spot drill (which has a simpler geometry) for this purpose.
| Size | Drill Diameter D1 | Body Diameter D2 | Drill Length L1 | Overall Length L2 | ||||
|---|---|---|---|---|---|---|---|---|
| inch | mm | inch | mm | inch | mm | inch | mm | |
| 00 | 0.025 | 0.64 | 1/8 | 3.18 | 0.030 | 0.76 | 1-7/32 | 30.95 |
| 0 | 1/32 | 0.79 | 1/8 | 3.18 | 3/64 | 0.97 | 1-7/32 | 30.95 |
| 1 | 3/64 | 1.19 | 1/8 | 3.18 | 3/64 | 1.19 | 1-1/4 | 31.75 |
| 2 | 5/64 | 1.98 | 3/16 | 4.76 | 5/64 | 1.98 | 1-7/8 | 47.62 |
| 3 | 7/64 | 2.78 | 1/4 | 6.35 | 7/64 | 2.78 | 2 | 50.80 |
| 4 | 1/8 | 3.18 | 5/16 | 7.94 | 1/8 | 3.18 | 2-1/8 | 53.97 |
| 5 | 3/16 | 4.76 | 7/16 | 11.11 | 3/16 | 4.76 | 2-3/4 | 69.85 |
| 6 | 7/32 | 5.56 | 1/2 | 12.70 | 7/32 | 5.56 | 3 | 76.20 |
| 7 | 1/4 | 6.35 | 5/8 | 15.88 | 1/4 | 6.35 | 3-1/4 | 82.55 |
| 8 | 5/16 | 7.94 | 3/4 | 19.05 | 5/16 | 7.94 | 3-1/2 | 88.90 |
| 9 | 11/32 | 8.73 | 7/8 | 22.22 | 11/32 | 8.73 | 3-5/8 | 92.07 |
| 10 | 3/8 | 9.52 | 1 | 25.40 | 3/8 | 9.52 | 3-3/4 | 95.25 |
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