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Addison Parallel Shank Twist Drills.
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High Speed Steel Parallel Shank Twist Drills Extra Long Series |
Specification Conform to IS :7823 - 1983 |
| Dimensions in mm |
Straight shank twist drills - extra long drills are drills having two helical
flutes with a parallel shank of approximately the same diameter as the cutting
end similar to a long series drills but with increased flute length for extra
long reach. Type 'N' will be supplied unless other wise specified.
| Preferred Nominal Diameter h8 | Range of Diameters | SERIES 1 | SERIES2 | SERIES3 | ||||
| Over | Upto & Including | Overall Length | Flute Length | Overall Length | Flute Length | Overall Length | Flute Length | |
| 3.0 | 3.00 | 150 | 100 | 190 | 130 | -- | -- | |
| -- | 3.00 | 3.35 | 155 | 105 | 200 | 135 | -- | -- |
| 3.5 | 3.35 | 3.75 | 165 | 115 | 210 | 145 | 265 | 180 |
| 4.0 | 3.75 | 4.25 | 175 | 120 | 220 | 150 | 280 | 190 |
| 4.5 | 4.25 | 4.75 | 185 | 125 | 235 | 160 | 295 | 200 |
| 5.0 | 4.75 | 5.30 | 195 | 135 | 245 | 170 | 315 | 210 |
| 5.5 6.0 |
5.30 | 6.00 | 205 | 140 | 260 | 180 | 330 | 225 |
| 6.5 | 6.00 | 6.70 | 215 | 150 | 275 | 190 | 350 | 235 |
| 7.0 7.5 |
6.70 | 7.50 | 225 | 155 | 290 | 200 | 370 | 250 |
| 8.0 8.5 |
7.50 | 8.50 | 240 | 165 | 305 | 210 | 390 | 265 |
| 9.0 9.5 |
8.50 | 9.50 | 250 | 175 | 320 | 220 | 410 | 280 |
| 10.0 | 9.50 | 10.60 | 265 | 185 | 340 | 235 | 430 | 295 |