Jobber drills with straight shank DIN 338

Taper shank subland drills
DIN 8379
for tapping size holes, 90°
Range of applications
Manufacturing specifications
HSS
Article no. 85710
Type N
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.
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
9,0...22,0 HSS
#d1# 85710
38
pilot-Ø
d2
mm
step-Ø
d1
mm
Morse
taper
total length
l1
mm
flute length
l2
mm
step length
l3
mm
for
threads
R
N
9.0 6.8 1 162 81 21.0 M 8 ○
11.0 8.5 | 175 94 25.5 M 10 ○
13.5 10.2 1 189 108 30.0 M 12 ○
15.5 12.0 2 218 120 34.5 M 14 ○
17.5 14.0 | 228 130 38.5 M 16 ○
20.0 15.5 | 238 140 43.5 M 18 ○
22.0 17.5 2 248 150 47.5 M 20 ○
MK
90°
d1
l1
l 2
l 3
d2
118°
209