Jobber drills with straight shank DIN 338

s
Straight shank step drills with flatted body
Works Standard
Range of applications
Manufacturing specifications
HSS
Article no. 85910
Article no. 85911
Type N
R
R
Special purpose tapping and centering
drill. Major angle 60°, to DIN 332,
page 2, form D (Article no. 85910) and
form DR (Article no. 85911).
For centering and facing on machines
where the bar is dressed on the end
face and centered in one operation
(dressing carried out by carbide tip
mounted on drill flat).
Point grinding: relieved cone
Point angle: 118°
Web thinnned: 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
#d1#
HSS
85910 85911
#d1# 38 38
R
R
body-Ø
d 3 h7
mm
step-Ø
d 2
mm
pilot-Ø
d 1 h8
mm
size
s
total
length
l 1 mm
flute
length
l 2 mm
step length
l 4
mm
step length
l 5
mm
for
thread
N
N
8.0 4.3 3.3 6.75 63 23 11.0 1.60 M 4
10.0 5.3 4.2 8.45 67 27 13.0 2.15 M 5
12.5 6.4 5.0 10.45 71 33 16.0 2.90 M 6
14.0 8.4 6.8 12.50 88 41 19.5 3.50 M 8
16.0 10.5 8.5 14.85 94 47 23.0 4.70 M 10
20.0 13.0 10.2 18.45 105 59 28.0 6.50 M 12
25.0 17.0 14.0 23.40 132 67 33.0 8.30 M 16
31.5 21.0 17.5 29.35 145 76 38.0 10.35 M 20
40.0 25.0 21.0 36.50 160 90 45.0 12.00 M 24
l 1
l2
l 5
l 4
118°
d3
90°
60°
d1
d2
15°
196
steam tempered