Jobber drills with straight shank DIN 338
Jobber drills with straight shank DIN 338
Jobber drills with straight shank DIN 338
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Extra length <strong>straight</strong> <strong>shank</strong> <strong>drills</strong><br />
<strong>DIN</strong> 1869, series 3<br />
Range applications<br />
Manufacturing specifications<br />
HSS<br />
Article no. 81610<br />
Type N<br />
R<br />
For drilling extremely deep holes. Feeds,<br />
speeds and workholding must be carefully<br />
studied to avoid vibration. Frequent<br />
<strong>with</strong>drawal of the drill from the hole<br />
(woodpeckering) is vitally important, as is<br />
copious flow of the correct type of coolant.<br />
If tolerances in the hole allow, a greater<br />
depth of penetration can be achieved by<br />
a slightly off-center point grind. Please<br />
note: These <strong>drills</strong> are not recommended<br />
for the drilling of holes in crankshafts.<br />
Point grinding: relieved cone<br />
Point angle: 118˚<br />
Web thinned: > Ø 2.36 mm to<br />
<strong>DIN</strong> 1412, form A<br />
Helix angle: standard<br />
Web thickness: standard<br />
Web taper: standard<br />
Flute form: standard<br />
Tolerance on Ø: h8<br />
Other manufacturing specifications to<br />
<strong>DIN</strong> 1414<br />
HSS<br />
Article no. 81640<br />
Type FN<br />
R<br />
A robust tool for use in difficult drilling<br />
conditions in extremely deep holes when<br />
swarf congestion prevents an adequate<br />
flow of coolant. For use in steels and cast<br />
iron having a tensile strength of up to<br />
1000 N/mm 2 .<br />
Not recommended for nickel-chrome<br />
steels or similar materials.<br />
Point grinding: relieved cone<br />
Point angle: 130˚<br />
Web thinned: to <strong>DIN</strong> 1412, form A<br />
Helix angle: greater than standard<br />
Web thickness: considerably greater<br />
than standard<br />
Web taper: none<br />
Flute form: very wide flute <strong>with</strong> special<br />
„rolled-off“ heels<br />
Tolerance on Ø: h8<br />
Other manufacturing specifications to<br />
<strong>DIN</strong> 1414<br />
HSS<br />
Article no. 81650<br />
Type FW<br />
R<br />
A special drill for deep holes in soft materials<br />
and those producing long stringy<br />
swarf <strong>with</strong> a maximum hardness of<br />
500 N/mm 2 such as: mild steel, aluminium,<br />
aluminium alloys, zinc, refined<br />
copper, silumin, electron, zamak,<br />
argalium, soft synthetic materials and<br />
wood.<br />
Point grinding: relieved cone<br />
Point angle: 130˚<br />
Web thinned: > Ø 2.36 mm to<br />
<strong>DIN</strong> 1412, form A<br />
Helix angle: greater than standard<br />
Web thickness: greater than standard<br />
Web taper: smaller than standard<br />
Flute form: very wide flute <strong>with</strong> special<br />
„rolled-off“ heels<br />
Tolerance on Ø: h8<br />
Other manufacturing specifications to<br />
<strong>DIN</strong> 1414<br />
103
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