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General => General => Topic started by: fazersharp on 13 May 2017, 03:01:55 pm

Title: Help me sharpen my drill bits
Post by: fazersharp on 13 May 2017, 03:01:55 pm

I have this set of colbolt drill bits http://www.toolstation.com/shop/p94153?table=no (http://www.toolstation.com/shop/p94153?table=no) but most of them are now blunt.
Can someone recommend a sharpening gizmo to re grind them, I do have a bench grinder and stone but I can never seem to get the angle right.   

Title: Re: Help me sharpen my drill bits
Post by: slappy on 13 May 2017, 04:20:10 pm

http://uk.rs-online.com/web/p/products/2189723/?grossPrice=Y&cm_mmc=UK-PLA-_-google-_-PLA_UK_EN_Tools-_-Power_Tool_Accessories_And_Drill_Bits&mkwid=sggAS6cXl_dc (http://uk.rs-online.com/web/p/products/2189723/?grossPrice=Y&cm_mmc=UK-PLA-_-google-_-PLA_UK_EN_Tools-_-Power_Tool_Accessories_And_Drill_Bits&mkwid=sggAS6cXl_dc)|pcrid|88057064763|pkw||pmt||prd|2189723&gclid=CNyy0JuV7dMCFdYy0wodr2gIWQ


If you are just having problems getting the angle right try something like this.

Title: Re: Help me sharpen my drill bits
Post by: chris.biker on 13 May 2017, 04:57:46 pm

I assume you have a pedestal grinder, you need to buy silicon carbide wheel for it.

Title: Re: Help me sharpen my drill bits
Post by: celticdog on 13 May 2017, 06:19:15 pm

If you've got a decent bench grinder you've got everything you need fella.

You can check the angle if you hold the business end of drill bit between 2 nuts  :eek  it forms the correct angle 120 degrees.


http://www.youtube.com/watch?v=1WnlXoA5lSk (http://www.youtube.com/watch?v=1WnlXoA5lSk)

Title: Re: Help me sharpen my drill bits
Post by: slappy on 13 May 2017, 06:41:04 pm

Thats a pretty good idea :thumbup

Title: Re: Help me sharpen my drill bits
Post by: fazersharp on 13 May 2017, 06:48:59 pm

Thanks for the help so far, looks like i need a  silicon carbide wheel, mine is more like a grinding stone and a bit rough.
I have seen in the past an all in one thing where I can just poke the bit into it, but thinking they are probably rubbish. 

Title: Re: Help me sharpen my drill bits
Post by: Skippernick on 13 May 2017, 09:48:16 pm

it'll be fine if you are careful. Sharpen drills all the time at work on shitty indented grindstones due to welders sharpening their tungsten tips.


JUST WEAR EYE PROTECTION.