High-precision countersink 90°, TiN, External ⌀ Dc: 31mm

Article no.: 150396 31
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External ⌀ Dc (mm) Unit price incl. VAT

Availability

  • Countersink tip angle: 90
  • Tool material: HSS
  • Number of cutting edges Z: 3
  • Standard: DIN 335 D
  • Shank: Morse taper

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Product details

Technical Data

External ⌀ 31 mm
Coating TiN
Countersink tip angle 90 degrees
Tool material HSS
Number of cutting edges Z 3
Standard DIN 335 D
Shank Morse taper
Through-coolant no
smallest countersink ⌀ for holes from 4.2 mm
Overall length L 112 mm
Morse taper MT 2
for countersunk screws DIN 7991 M16
Feed f in steel < 500 N/mm2 0.25 mm/rev.
Colour ring without
Pre-drill ⌀ 4.2 mm
Type of product Stepped drill and countersink

Identification & Classification

Article number 150396 31
EAN / GTIN 4045197087027
Manufacturer number 150396 31
Manufacturer Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com

Application Table

Alu > 10% Si
N
25
Steel < 500 N/mm²
P
34
Steel < 750 N/mm²
P
32
Steel < 900 N/mm²
P
32
CuZn
N
80
wet maximum
 
dry
 

Description

Version:

Countersinks radially relief ground. Chip flutes are ground from solid up to size 31. Chip angle varies with the countersink ⌀ for optimum chip formation. Countersink point and circumference are relief ground and cut easily.
High-precision countersink for considerable performance improvement.

Note:

For countersink bits with shank 6.3 mm (1/4 inch) see Group 67.
For suitable reducing adapters for tools with MT shanks see No. 343000-343530.

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