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ISO 3294:2016 specifies the dimensions of parallel shank countersinks for angles 60°, 90° and 120° inclusive.
It specifies dimensions in metric units only, these being regarded as the only recommended dimensions in the future, for countersinks with cutting diameters in the range 8 mm to 25 mm.
The dimensions apply only to tools made from high-speed steel. However, if the method of production allows, the shanks may be manufactured from a suitable alternative material, such as a carbon steel.
Unless otherwise indicated, the countersinks will be right-hand cutting.
Morse taper shank countersinks are the subject of ISO 3293.
| Author | ISO/TC 29/SC 9 Tools with defined cutting edges, holding tools, cutting items, adaptive items and interfaces |
|---|---|
| Editor | ISO |
| Document type | Standard |
| Format | Paper |
| Edition | 2 |
| ICS | 25.100.30 : Drills, countersinks, reamers
|
| Number of pages | 4 |
| Replace | ISO 3294:1975 |
| Weight(kg.) | 0.1068 |
| Year | 2016 |
| Country | Switzerland |