julianf
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- 7,983
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- devon, uk
I cant automate countersinking, so im going to have to do a whole load of them by hand, on a drill press.
I have been sent the fasterners, and, by eye, holding them up to the corner of a bit of paper, they look to be slightly more obtuse than 90 degrees - but only a touch. I assume a 90 degree countersink is what i should use?
But then what do i buy that wont just instantly eat a hole in the alloy the moment it touches it, or push so much of a burr that the job is a mess?
A quick browse on ebay brings up this -
https://www.ebay.co.uk/itm/G1366-3-...=item1cae372ae5:g:~~MAAOSwCDZbG~Cz:rk:95:pf:0
only marked "good" for Al alloys...
And what's the "Non-90° DIN 335" mean?
I can find many references to "DIN 335 form C" but none of them actually say what it is. Not on wikipedia or anything so far as im aware. And the "non-90 degree" bit?
I should know this stuff, but i dont - talk to me about engraving cutter geometry, and im on form - manual stuff, not so much!
I have been sent the fasterners, and, by eye, holding them up to the corner of a bit of paper, they look to be slightly more obtuse than 90 degrees - but only a touch. I assume a 90 degree countersink is what i should use?
But then what do i buy that wont just instantly eat a hole in the alloy the moment it touches it, or push so much of a burr that the job is a mess?
A quick browse on ebay brings up this -
https://www.ebay.co.uk/itm/G1366-3-...=item1cae372ae5:g:~~MAAOSwCDZbG~Cz:rk:95:pf:0
only marked "good" for Al alloys...
And what's the "Non-90° DIN 335" mean?
I can find many references to "DIN 335 form C" but none of them actually say what it is. Not on wikipedia or anything so far as im aware. And the "non-90 degree" bit?
I should know this stuff, but i dont - talk to me about engraving cutter geometry, and im on form - manual stuff, not so much!