Jobber drills with straight shank DIN 338

Taper shank step drills
Works Standard
Range of applications
Manufacturing specifications
HSS
Article no. 85914
Type N
R
Special purpose tapping and centering
drill. Major angle 60°, to DIN 332,
page 2, form D.
Not suitable for simultaneous facing
of workpiece on centering and facing
machines.
Point grinding: relieved cone
Point angle: 118°
Web thinned: to DIN 1412. form A
Helix angle: greater than standard
Web thickness: standard
Web taper: standard
Flute form: standard
Tolerance on Ø: h8
Other manufacturing specifications to
DIN 1414
body-Ø
d 3 h7
mm
step-Ø
d 2
mm
14,0...40,0 HSS
pilot-Ø
d 1 h8
mm
Morse
taper
total
length
l 1 mm
flute
length
l 2 mm
step length
l 5
mm
step length
l 4
mm
#d1# 85914
38
for
threads
R
N
14.0 8.4 6.8 1 110 41 19.5 3.5 M 8
16.0 10.5 8.5 2 131 47 23.0 4.7 M 10
20.0 13.0 10.2 2 145 59 28.0 6.5 M 12
25.0 17.0 14.0 3 172 67 33.0 8.3 M 16
31.5 21.0 17.5 3 184 76 38.0 10.3 M 20
40.0 25.0 21.0 4 222 90 45.0 12.0 M 24
MK
118°
60° 90°
d1
d2
d3
l 5
l 4
l 1
l 2
bright
steam tempered
198