I have begun making my own carbide turning tool and have already flattened a piece of bar stock and drilled and tapped a hole in the flattened portion. The issue I am having is the set screw I have that came with my carbide cutter from az carbide won't tighten down all the way. Anyone have any ideas why this would happen? I have about a 1/32" gap between the shaft and the bottom of the cutter. Thanks
To me it sounds like a thread size difference issue. The only other thing I can think of is it wasn't drilled deep enough but I'm sure you checked that out.
Do the threads go all the way to the bottom of the hole? Did you use a bottoming tap for this or drill the hole deeper than it needs to be? (Not trying to be rude, but damhik applies here.)
The screw threads are bottoming out at the head. You need one of these countersink bits so the head can go just a skosh deeper. I had to do it on mine too. Problem solved.
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Hole is threaded all the way through the rod, i took a longer bolt of the same thread and ran it all the way through to double check. I'm wondering if exhale is on to something with the countersink but I've not heard of anyone else having to do this.
I think Joe hit the nail on the head. I'm pretty sure you'll be set once you do that. One other thing to be aware of is that the threads need to be perpendicular to the insert bed. If they're not, your insert will "jack" on one side. You may not even be able to see it but if you get vibration, or chatter, when cutting with it, it's something to check.
Good for you taking the initiative to make your own tools!
so the countersinking worked like a charm. I tried it out a little before making the handle and noticed with the round rod and square cutter any little bites and the tool wants to twist. Going to get some square bar stock and use it for the square cutter and use the round bar stock for the round cutter.
Sorry, Notw, I didn't see your response. SuperCubber is right. I make mine from 5/8" aluminum stock. And yes you can polish aluminum to look like chrome.
thanks for the responses. Do you notice any flexing or movement from the Aluminum? I used steel for the two I have made and they are heavy, which is good it stays on the tool rest nice, but just seems front end heavy when holding.
The steel versions I made are front heavy too. I have an aluminum bar, courtesy of a generous fellow LJ, but embarrassingly I haven't used it yet. I plan to but keep putting it off. I believe aluminum will be plenty strong and rigid enough for tools, my only concern is wear where it rubs the tool rest.
I wish I knew what the EWT bars are made of. Mine are barely magnetic but lightweight like aluminum.
So here is what I ended up with, I used the round bar I had already cut and tapped for a round cutter and then used square steel for the radiused square cutter. The woods are Walnut and Pecan.
Rick as I look how other carbide tipped tools are made, than I see that they machine the ends so that the tips are captured in a cense, as a round one is still able to spin, but they do go through the bother and expense to do this for a reason I would expect.
As for me I can see how a tip might rotate and loosen the screw while doing this, after all there can be lots of bumps and rattles working a raw piece of wood, I'll add two picture that show tools that are made like that
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