Shortening HSS drills

[JasonBModerator @jasonb]

Looks like these Tang drills are from solid

[egaParticipant @ega]

Thanks to Hopper for answering my original query.

I enjoyed the video (and not having to search for it!); there were more processes than I would have imagined. "Amanda" made the distinction between rolled and fully-ground bits; perhaps the latter are butt welded?

Presumably very many HSS drills are re-cycled and it occurred to me that the all-HSS variety might be easier to deal with.

[HopperParticipant @hopper]

Most likely. Although they don't say anything specifically about the blanks before they go into the oven or whatever that first machine is. Seems in this day and age it would be a lot of faff to weld on stubs to save a few cents worth of HSS. Maybe more likely on something like a 1/4" drill with a MT2 shank etc. but I think they were more common years ago than now.

Interesting to see their factory is still pretty hands-on labour intensive. Real mid-20th century style to it.

[egaParticipant @ega]

I had some old style square taper shank drills with a brazed-on taper.

I guess they never slipped in the chuck!

[HopperParticipant @hopper]

Posted by ega on 16/05/2021 11:08:48:

I had some old style square taper shank drills with a brazed-on taper.

I guess they never slipped in the chuck!

I guess not! Probably they went in those old two-jaw drill chucks that had a 90-degree V notch in each jaw to grip the square shank. I remember my grandfather had some old woodworking drills like that. Not sure how it all worked.

 

Edited By Hopper on 16/05/2021 11:51:28

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