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Thread: Sharpening tiny drills
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31st May 2018, 10:49 PM #1Taking a break
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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
IMAG2895.jpgIMAG2898.jpgIMAG2896.jpgIMAG2897.jpgIMAG2900.jpg
Load the appropriate sleeve
IMAG2901.jpg
Secure the bit in the pin vise
IMAG2902.jpg
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
IMAG2903.jpg
Set the projection with the knob on the bottom and lock with the nut at the base of the pin vice
IMAG2904.jpg
A few strokes with the provided stone
IMAG2905.jpg
Index and repeat
IMAG2906.jpg
They even include a small rod to push the bit back out
IMAG2907.jpg
Patent here: https://patents.google.com/patent/US2736147
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31st May 2018, 10:58 PM #2China
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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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1st June 2018, 12:29 AM #3GOLD MEMBER
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I used to work with a toolmaker who sharpened number drills on a grinder using a jewellers loupe.
CHRIS
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1st June 2018, 01:31 AM #4China
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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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1st June 2018, 02:10 PM #5
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.
Dallas
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2nd June 2018, 07:38 PM #6Taking a break
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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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6th June 2018, 07:19 PM #7GOLD MEMBER
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Interesting gadget. So do you actually have it or just the pics?
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6th June 2018, 07:24 PM #8Taking a break
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I have it
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6th June 2018, 09:55 PM #9GOLD MEMBER
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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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6th June 2018, 11:20 PM #10Taking a break
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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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7th June 2018, 07:34 PM #11Taking a break
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Yep, it's 118 degrees
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