
standard* standard range first choice alternate choice diameter range
| P | M | KNSH | |
| modular drills |
| D1 mm | D1 inch | drilling depth | |||
| with internal | hole | ||||
| min–max | min–max | L/D1 |
coolant channel grade/series tolerance
TOP DRILL M1™ with front clamping mechanism
TOP DRILL M1
WU25PD** IT9–IT11 7,94–25,99 .3125–1.1023 —
inserts
TopSTEP SH— WP20PH chamfering
| 12,50–36,01 | — .4921–1.4177 |
| inserts | |
| TopSTEP VG— | |
| WP20PH | |
| 7,94)Ø<9,50 | .3125)Ø<.3740 |
| 9,50)Ø<11,00 | .3740)Ø<.4331 |
| 11,00)Ø<12,50 | .4331)Ø<.4921 |
| 12,50)Ø<14,00 | .4921)Ø<.5512 |
| TOP DRILL M1 | |
| — — 14,00)Ø<15,50 | max 3–8 x D .5512)Ø<.6102 |
| bodies | |
| 15,50)Ø<16,50 | .6102)Ø<.6496 |
| 16,50)Ø<20,50 | .6496)Ø<.8071 |
| 20,50)Ø<21,00 | .8071)Ø<.8268 |
| 21,00)Ø<25,99 | .8268)Ø<1.023 |
* Apart from our standard drills, we can offer you a wide variety of special coating solutions and edge preparations to fulfill all your needs. If a specific drill is not suitable for your workpiece material, please contact your WIDIA™ distributor for available options. ** Grade WU25PD™ was previously named K20FTiAlN.