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28-06-2013 #1
To drill holes in thin sheet steel as others have said sandwich between to pieces of wood but main thing is do not use a normal jobbers drill but grind one up like a wood bit as a wing and spur.
If you have decent wood bits you could just use one of these but most i have come across aren't even hardened hence the grinding up of the wing and spur.
Worth keeping a few as they are also ideal on plastics and prevent splitting as they exit the hole.
John S.Last edited by John S; 28-06-2013 at 09:36 AM.
John S -
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28-06-2013 #2
therefore maybe something like these at the right speed...
Dremel Brad Point Drill Bit Set - 631 | eBay (they go up to 1/4")
never used them for tin, but they work great on acrylic! (& handy to have in your arsenal of bits - especially if your machine is confined/restricted to a 1/8" collet, such as a rotary tool in this arrangment - https://www.google.co.uk/shopping/pr...g&ved=0CCAQrRI)Last edited by HankMcSpank; 28-06-2013 at 10:16 AM.
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28-06-2013 #3
I want to avoid drilling if I can , I want a sort of high bred clamp come punch template combo , ill work on it and see what I can do, thanks for the replies guys :)
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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28-06-2013 #4
juliuscaesar
Last edited by m_c; 20-05-2014 at 10:58 PM.
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29-06-2013 #5
Hi Fivetide
regarding die press, a decent pillar drill should provide enough pressure for punching thin stuff,clamp your die to the table (simples)
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29-06-2013 #6
What about this sort of punch press?
eBay item no.
121130794607
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30-06-2013 #7
Whitney punch
Ebay 221245161892
peter
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30-06-2013 #8
You'd probably get a decent hole if they were drilled with a milling slot drill. Probably a nice job for a CNC. Unless you fancy building a CNC punching machine...
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30-06-2013 #9
Rotabroach annular cutter (aka mag drill cutter) often does a good job on sheet too... but you'd probably need a mill to hold the shank (fits nicely in a 19 mm ER32 collet). Sizes go down to 12 mm in standard series, never tried the 'mini' ones.
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ah just seen it's a 1/4 inch hole so as you were...Last edited by bikepete; 30-06-2013 at 10:10 PM.
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