Modular Drills
Tool Selection Guide
standard*
standard range
first choice
alternate choice
diameter range
P M K N S H
modular drills
with internal
coolant channel
hole
tolerance
grade/series
D1 mm
min–max D1 inch
min–max drilling depth
L/D1
7,94–25,99 .3125–1.1023 —
12,50–36,01 .4921–1.4177 —
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 14,00)Ø<15,50 .5512)Ø<.6102 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
TOP DRILL M1 ™ with front clamping mechanism
TOP DRILL M1
inserts
chamfering
inserts
TOP DRILL M1
bodies
WU25PD** TopSTEP SH—
WP20PH
TopSTEP VG—
WP20PH
—
IT9–IT11
—
—
—
max 3–8 x D
U2
widia.com
* 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.