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Thread: Sharpen or buy new?
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3rd October 2024, 05:35 PM #1Intermediate Member
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- Jan 2009
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Sharpen or buy new?
After 40 years and quite a bit of use my old centre punch is now blunt. A couple of new ones is only about $35- [ one big + one small] but I'm cheap. Can I sharpen my old one without loosing the hardness that makes a punch leave that nice little cup to get a drill bit started with minimum wandering?
Still no bench grinder tho but my mate works at a school with a full workshop and I thought I might be able to ask a favour
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3rd October 2024, 11:31 PM #2
Generally hardening is done at a surface level only, depth will depend on the process.
Unless you are removing significant material or cooking the item during grinding there is no issue with re-sharpening a centre punch.
Have re-sharpened mine numerous times.
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5th October 2024, 11:26 PM #3Member
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- Jun 2010
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- SW Victoria
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Take it slow when sharpening, so as not to heat it up, and it'll be fine (also, nothing to lose in giving it a go)
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7th October 2024, 08:53 AM #4Senior Member
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Place it in a vice and use a file.
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19th October 2024, 07:58 PM #5Intermediate Member
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- Jan 2009
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- Reservoir Melbourne
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OK Will need to buy a vice, still haven't done that, new finecut file too.
I checked out new ones and they are a lot smaller than mine, but I'll work it out.
I've been buying other things than tools lately.
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19th October 2024, 10:50 PM #6
Not the first time I have used an angle grinder to sharpen pointed tools or screwdrivers.
Generally use a flap disk but grinding disk will work ok.
Spin the centre punch in your fingers or can place in a drill if it’s easier.
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