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12 Attachment(s)
Sharpening tiny drills
Ever wondered how to consistently and accurately sharpen tiny drills? Here's the answer:
True Point, by the Up-To-Date Tool Co, Worcaster, Mass. USA, with sleeves for Nos. 41-60 (2.438 - 1.016 mm). I have also seen an expired ebay listing for one with sleeves for 61-80
Attachment 436326Attachment 436329Attachment 436327Attachment 436328Attachment 436330
Load the appropriate sleeve
Attachment 436331
Secure the bit in the pin vise
Attachment 436332
Line the edge up with the attached guide. According to the Patent documentation there was a magnifying attachment, possibly as an optional extra, but I don't have it
Attachment 436337
Set the projection with the knob on the bottom and lock with the nut at the base of the pin vice
Attachment 436333
A few strokes with the provided stone
Attachment 436334
Index and repeat
Attachment 436335
They even include a small rod to push the bit back out
Attachment 436336
Patent here: https://patents.google.com/patent/US2736147
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That would be a very handy gadget, I think I will be looking out for one, I have lots of small drills to sharpen
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I used to work with a toolmaker who sharpened number drills on a grinder using a jewellers loupe.
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That is interesting I must say I have never really tried, I buy them in packs of 10 and just throw the blunt one in the round to it box
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That's a cool little tool. Can't imagine anyone taking the time to use one nowadays in this throw away society, but would have been very handy back in the days of when it was invented.
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The smallest I've tried sharpening on a grinder is 2mm. Worked alright, but bits are so cheap that it's hardly worth the effort. I did do a 2.5mm brad point once, that was fun
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Interesting gadget. So do you actually have it or just the pics?
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Nice one. Was that a local find? and what angle does it set the tip?
I have the Tormek drill sharpener which does a quite a nice job but only goes down to 3mm.
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It was an ebay find a few years ago out of the US.
I'm not sure the exact angle, but it looks like 118 degrees. I'll try to get a protractor on it to confirm
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