Jobber drills with straight shank DIN 338

Straight shank stub step drills
Works Standard
medial tolerance, 90°
Range of applications
Manufacturing specifications
HSS
Article no. 85920
Article no. 84445
Type N
T
R
R
Standard drill for the efficient production
of tapping size holes to DIN 336 section
1, and 90° countersinks in accordance
with clearance holes to DIN EN
20 273.
The short design makes the tool very
resistant to torsional flexing and especially
suitable for use on CNC- and NCmachines.
Point grinding: relieved cone
Point angle: 118°
Web thinned: to DIN 1412, form A
Helix angle: standard
Web thickness: standard
Web taper: standard
Flute form: standard
Tolerance on Ø: h6
Total length to DIN 1897
Step angle: 90°
Please note: The cutting speed should
be selected according to the large
(body) diameter and the feed rate according
to the small (pilot) diameter.
Other manufacturing specifications to
DIN 1414
3,4...13,5 HSS
#d1# 85920 84445
38 39
body-Ø
d 2
mm
step-Ø
d 1
mm
total length
l 1
mm
flute length
l 2
mm
step length
l 3
mm
for
threads
3.4 2.5 52 20 8.8 M 3
4.5 3.3 58 24 11.4 M 4
5.5 4.2 66 28 13.6 M 5
6.6 5.0 70 31 16.5 M 6
9.0 6.8 84 40 21.0 M 8
11.0 8.5 95 47 25.5 M 10 ○
13.5 10.2 107 54 30.0 M 12 ○
R
N
R
N
T
90°
118°
d 1
d 2
l2
l3
l1
203