Jobber drills with straight shank DIN 338

Jobber drills with straight shank
DIN 338
Range of applications
Manufacturing specifications
HSS
Article no. 81020
Article no. 81025
Type H
R
L
For drilling hard, crumbly materials such
as brass, magnesium alloys, bronze,
phosphor bronze, slate, mica, pertinax,
zamak (thin sections), electron (thin sections),
(insulating materials, ebonite,
bakelite, galalithe, celluloid, synthetic
resins, horn compounds, eternit, hardboard,
perspex and plastic laminates).
For these and similar materials a point
angle of 140° is recommended when drilling
in the plane of the laminations: for
drilling of right angles to the laminations
a point angle of 80-100° will give the best
results.
Point grinding: relieved cone
Point angle: 118˚
Web thinned: > Ø 14.00 mm to
DIN 1412, form A
Helix angle: smaller than standard
Web thickness: standard
Web taper: smaller than standard
Flute form: wider than standard
Tolerance on Ø: h8
Other manufacturing specifications to
DIN 1414
HSS
Article no. 81030
Article no. 81035
Type W
R
L
For drilling soft materials forming long
stringy swarf, such as:
aluminium, aluminium alloys, zinc,
refined copper, silumin, electron, zamak,
argalium, soft synthetic materials, wood
Poind grinding: relieved cone
Point angle: 130˚
Web thinned: > Ø 14.00 mm to
DIN 1412, form A
Helix angle: greater than standard
Web thickness: standard
Web taper: none
Flute form: wider than standard
Tolerance on Ø: h8
Other manufacturing specifications to
DIN 1414
bright
steam tempered
30