I can. See post #9. 1.41 dia ball is tangent at .705. Its a 2:1 ratio. because sin of 30 degrees is 0.5.You can't know this since the other diameters are not given. It could touch at the .705 dimension .
I can. See post #9. 1.41 dia ball is tangent at .705. Its a 2:1 ratio. because sin of 30 degrees is 0.5.You can't know this since the other diameters are not given. It could touch at the .705 dimension .
I assumed it was a gauge ball since that is how these things get measured. It has nothing to do with chambers in particular, any angled surface that needs to be measured is frequently done with a ball or round pin. Exactly the way thread gauges work. With gauge balls or gauge pins, you can use some high school trig to solve it. Every machinist will need trig at some point, if you didn’t have that in high school, or forgot it, it would be helpful to spend some time and learn it.Not fair. You guys are using advanced knowledge of chambers. The .0500 dimension was not given. It was not specified that this was a gauge ball. still good work on solving it! Does this help the OP?
Also realize that some well meaning gun plumbers put a chamfer on the cone/chamber junction. This further f's up the measurement unless you put an identical chamfer. But any chamfer there results in an unsupported chamber.
You'll see some additional pieces for measuring the cone is just a flat disc that has the cone angle cut onto it. Some have a stub that projects down into the chamber. But a disc, cut at same angle as cone your measuring, will rest on the cone and allow a more accurate measurement with the ball. Your copying, so you just duplicate that measurement on new barrel.
That stem is more of a handy feature to hold the part after cutting taper, parting off and turning around. Grab the stem in a collet and face it off.Yeah, I've seen the "intake valve" style gauges. I think I'll make some up.
Why can't you measure off of a headspace gauge? Have you finished the chamber yet, or are you doing the cone first?