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Stub stepped drill HSS 90° M4

Article no.: 117020 M4
  • Tool material: HSS
  • Standard: DIN 1897
  • Tolerance nominal ⌀: h8
  • No. of teeth Z: 2
  • Point angle: 118

Product details

Technical Data

for threads M4
Coating vaporised
Tool material HSS
Standard DIN 1897
Tolerance nominal ⌀ h8
No. of teeth Z 2
Point angle 118 degrees
Shank Parallel shank to h8
Countersink angle 90 degrees
Through-coolant no
⌀ D1 1st step with chamfer h8 3.3 mm
⌀ D2 2nd step with chamfer h8 4.5 mm
Step height L1 1st step 11.4 mm
Flute length Lc 24 mm
Overall length L 58 mm
Shank ⌀ Ds 4.5 mm
Feed f in steel < 750 N/mm2 0.03 mm/rev.
Shank tolerance h8
Colour ring without
Application for type of drilling for blind hole and through hole
Type of product Stepped drill

Identification numbers & Classifications

Article number 117020 M4
EAN / GTIN 4045197035646

Application Table

Aluminium (short chipping)
N
45
Steel < 500 N/mm²
P
40
Steel < 750 N/mm²
P
30
Steel < 900 N/mm²
P
25
GG(G)
K
25
CuZn
N
80
Oil
 
wet maximum
 

Description

Version:

Very sturdy. Tight concentricity tolerances between drill ⌀ and counterbore ⌀ guarantee exact alignment.
Special surface treatment, resulting in reduced tendency to edge build-up and improved chip evacuation.

Advantage:

Hole and countersink are produced in one operation and precisely aligned.

Application:

Particularly suitable for NC machines due to high positional accuracy, excellent centring properties and great sturdiness. The preceding centring operation can thus often be omitted. For thread tapping drill holes to DIN 336 sheet 1 with 90° countersink. In the following operation, the tap therefore does not have to cut into the sharp edge of the hole.

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