Jobber drills with straight shank DIN 338

Straight shank subland drills
DIN 8378
for tapping size holes, 90°
Range of applications
Manufacturing specifications
HSS
Article no. 85310
Type N
R
Standard drill for the efficient production
of tapping-size holes to DIN 336,
section 1 and 90° screwhead countersinks
corresponding to the clearance
holes of DIN EN 20 273.
Note: Cutting speed should be selected
according to the large (body) diameter
and feed rate according to the small (pilot)
diameter.
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: d1=h9; d2=h8
Step angle: 90°
Other manufacturing specifications to
DIN 1414
3,4...13,5 HSS
#d1# 85310
38
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 70 39 8.8 M 3
4.5 3.3 80 47 11.4 M 4
5.5 4.2 93 57 13.6 M 5
6.6 5.0 101 63 16.5 M 6
9.0 6.8 125 81 21.0 M 8
11.0 8.5 142 94 25.5 M 10
13.5 10.2 160 108 30.0 M 12 ○
R
N
90°
d1
d2
l2
l3
118°
l1
204
steam tempered