MadModder
Gallery, Projects and General => How do I?? => Topic started by: celsoari on May 24, 2020, 05:28:23 PM
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Hello friends, does anyone have experience in building (DIY) the trepan tool (drill)?
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I've got a val-cut and I've also ground tools to do it. VERY useful!
Do you need photos?
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Here's a few pictures of a carbide trepanning insert , they may help with the cutting geometry.
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Bill, does that tool have a tendency to dive towards the centre of the hole ? Quite aggressive rakes on the tip, something I should really have a play with, what are the tip dimensions hard to judge scale from the pictures.
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Celsoari,
How big a trepanning tool? https://www.youtube.com/user/userwl2850 does some amazing deep hole drilling!
Regards, Matthew
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Bill, does that tool have a tendency to dive towards the centre of the hole ? Quite aggressive rakes on the tip, something I should really have a play with, what are the tip dimensions hard to judge scale from the pictures.
It's about 3mm groove and about 30mm deep , total length about 65.
Can't say I've noticed it dive in any particular direction ,it is solid carbide.
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Celsoari,
How big a trepanning tool? https://www.youtube.com/user/userwl2850 does some amazing deep hole drilling!
Regards, Matthew
Neat8-) remined me that broaching cutters are also trepanning tools and another useful option for making big holes
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Cheers Bill, I thought just the tip was carbide. Nice link Matthew, he was just down the road (a bit) from us, wish I could have seen his place before he wound it up, real shame.
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The fancy trepanning tools are run well below centerline, if I remember correctly, and the whole insert is slanted down a lot. Very funny looking. I didnt see any dig in issues, even on delrin.
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