How and what to make a square hole - first way

Опубликовано: 11 Февраль 2016
на канале: Игорь Негода
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Quote from the book: The nature of the work of broaching and firmware is different in that while the broach is pulled through the previously prepared hole, the firmware is pushed through it, therefore in the first case the tool works in tension, and in the second - in compression. The holes are usually flashed on presses.
So is it a broach or all the same firmware?
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