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Article code:
EAN / GTIN:
Manufacturer number:
Cat. Nr.:
Stub stepped drill HSS 90°, TiAlN, for threads: M4
Article no.: 188527
Catalog no.: 117040
Article code:
- Tool material: HSS
- Standard: DIN 1897
- Tolerance nominal ⌀: h8
- Number of cutting edges Z: 2
- Point angle: 118
Product details
Technical Data
| for threads | M4 | |
| Coating | TiAlN | |
| Tool material | HSS | |
| Standard | DIN 1897 | |
| Tolerance nominal ⌀ | h8 | |
| Number of cutting edges 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 & Classification
| Article number | 188527 | |
| Catalog number | 117040 | |
| EAN / GTIN | 4045197035714 | |
| Manufacturer number | 117040 M4 | |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Application Table
N
56
N
50
P
50
P
37
P
31
P
12
P
10
K
31
N
80
Description
Version:
Very sturdy. Tight concentricity tolerances between drill ⌀ and counterbore ⌀ guarantee exact alignment.
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.