Peter, did you get it to work?? I just used a countersink myself, but on plywood and was in the stage of wonder of this simple invention.? I even took a picture with my phone to remind me how to do this on plywood.??
Drilling 260 brass is agreeable.? ? I might have been swearing during the project that some of the brass I had from K & S did not seem like it was 260 brass as it machined quite differently, when I initially started turning brass balls with Taig's radius turner.??
I was drilling 5/32" balls to accept a .072 diameter brass rod and this drill bit 'finally' worked.
I did try to re-sharpen my drill bits to a nice point and nothing was working...
My brain remembers that I need zero degree rake for maching brass, but I could not accomplish this in a 49 gauge drill bit.? I just reordered more drill bits;? being frustrated and purchasing 2 at a time, to xx for shipping... The latest order that I purchased was visibly without magnification very inconsistent at the tip of the tool bit and that point was very helpful in controlling the drill bit from wobbling, when drilling 5/32" brass balls.
I thought the TIN coating worked best for my application, initially I bought 3 to test what worked.
I finally created a jig to hold the 5/32" balls and drilled them on my unimat, set up as mill.
The blasted 5/32" balls needed 4 holes, 2 sets of holes that a perpendicular to the other 2 holes... it sounded easy, but I am finally close to that goal of making a brass bed.? I hope to have it finished soon, just working on jig to assemble all the little pieces in a perpendicular manner.? Who wants a wonky brass bed?? Not me!
It is hot & humid for the next 10 days so I don't know if this is going to get done with this weather.
Tamra
Bill in OKC too