SOMTA HSS Centre Drills - MM & Inch
mm
|
d |
d 1 | l 2 | l 1 | Type A | Type B | Type R |
| 0.8 | 3.15 | 1.1 | 25 | ◉ | ||
| 1 | 3.15 | 1.3 | 31.5 | ◉ | ||
| (1.25) | 3.15 | 1.6 | 31.5 | |||
| 1.6 | 4 | 2 | 35.5 | ◉ | ||
| 2 | 5 | 2.5 | 40 | ◉ | ||
| 2.5 | 6.3 | 3.1 | 45 | ◉ | ◉ | |
| 3.15 | 8 | 3.9 | 50 | ◉ | ◉ | ◉ |
| 4 | 10 | 5 | 56 | ◉ | ◉ | |
| (5) | 12.5 | 6.3 | 63 | ◉ | ◉ | |
| 6.3 | 16 | 8 | 71 | ◉ | ||
| (8) | 20 | 10.1 | 80 | ◉ | ||
| 10 | 25 | 12.8 | 100 | ◉ |
Inch
| Ref Number | d | d 1 | l 2 | l 1 |
| BS 1 | 1.19 | 3.18 | 1.8 | 38 |
| BS 2 | 1.59 | 4.76 | 2.2 | 45 |
| BS 3 | 2.38 | 6.35 | 3.6 | 51 |
| BS 4 | 3.18 | 7.94 | 4.4 | 57 |
| BS 5 | 2.76 | 11.11 | 6.8 | 64 |
| BS 6 | 6.35 | 15.88 | 8.7 | 76 |
| BS 7 | 7.94 | 19.05 | 11.1 | 89 |
SOMTA HSS Centre Drills Characteristics
- Centre drill for general drilling of steel, carbon steel, alloy steel
- Centre drill with HSS High Speed steel material with Bright Finish
- Centre drill are manufactured to BS328 & DIN333 standards
- For spotting or drilling of precision pilot hole
The SOMTA range consists of over 7 000 standard items and have a cutting tool available for almost every application
SOMTA constantly innovate and designed drills with improved point and flute geometries for enhanced penetration and chip removal
Product attributes
HSS
BS 328
60°
