Lead – The axial advance of a helical cutting edge in one revolution.
No. Been there, done that. Have purchased the odd out of date McMaster-Carr Catalog, just so I knew what to call the thingymawhatsit that I was looking for!FYI Harvey Tools is more than willing to send you a Catalog which is very informative and educational. BUT, if you ask for the free catalog it comes with a 27.00 price into Canada.
You need a cleaning rod with bearings in the handle.And how do you determine barrel twist rate?
Can you use any end mill to cut with the flutes? Or are some that you can only use the end cutters to cut with?
And how do you determine barrel twist rate?
Down load the App, free and does all that along with drawings and details.No. Been there, done that. Have purchased the odd out of date McMaster-Carr Catalog, just so I knew what to call the thingymawhatsit that I was looking for!
Sucks sometimes, living out in the Boonies. Other times, it's worth the costs involved!
Except that I cannot have it sitting in the reading room, available for me to open at random, and see something that I did not, up till then, know I needed!Down load the App, free and does all that along with drawings and details.
Same reason I like wandering the aisles in various specialty Supply Houses in several fields, Simply knowing that something exists, is of more value to me, than is knowing where to get something I already know I need!
I have a couple cleaning rods (that look identical but different brands) that the handle spins freely but I’m guessing they aren’t ball bearing quality. I’ll see what I can beg or borrow because now I’m curious to try this. Thanks!You need a cleaning rod with bearings in the handle.
Using a tight fitting brush, or patch, push the cleaning rod 3/4's the way down the bore. Pull back about an inch or so. Put a pen mark on the cleaning rod TDC, at a point on the barrel/action, retract the cleaning rod slowly, it will start to follow the rifling, when that mark is TDC again, put another mark. Measure the distance between your two marks. That is your twist rate. Do it several times to get consistant results. (There'll be some slippage but it should be pretty accurate.