Radial live threading
- Thread starter Ed P
- Start date
Anything is possible I guess, but why fork out for a super expensive thread mill of some sort, and can your lathe even do the weird pitch diameter?
The Radial threads are some of the easiest to do and they come out perfect if you follow the instructions. If it ain't broke, don't try to fix it
The Radial threads are some of the easiest to do and they come out perfect if you follow the instructions. If it ain't broke, don't try to fix it
Only if you use a pin as the mechanism for pitch control. Other than that, it will require special gearing or some form of an electronic lead screw. You then also need the cutter with the large radius and a very thin neck, all going the wrong way when it comes to making an internal tool. The guided taps do work very well on a true running hole that matches the guide diameter of the tap.
The one I measured in machine shop school was 7.637 TPI. The math says the pitch is .1309,so a single point cutter needs to be that same width with a full half-ball radius to cut right if you have CNC capability.
But that is based on trying to externally thread something with a v-shape too. Coming up with a way to cut that radius internally in what I'm guessing is a 5/16 hole is going to be an adventure for sure,but I'm all ears if you find a way. I heard a story one time about a guy had a cutter that worked one time with a router mounted on a lathe with threading gears,but never saw it or the end result. Tommy D.
But that is based on trying to externally thread something with a v-shape too. Coming up with a way to cut that radius internally in what I'm guessing is a 5/16 hole is going to be an adventure for sure,but I'm all ears if you find a way. I heard a story one time about a guy had a cutter that worked one time with a router mounted on a lathe with threading gears,but never saw it or the end result. Tommy D.
My question to you is this. Why even use a radial pin in any of your cues? Worst idea ever used for a 2 pc jointing of a pool cue.
Well since you asked....
sort of wonder if the lead is based on a module pitch Gearbox on some lathes for cutting thngs like gear hobs that need to have pi In the lead since the purpose of the tool will be to cut integral numbers of teeth around a circumference. Lathes with such gear options are not rare, but not common either.
AFA the female cutter, it has a cove each side, point in the middle. I can/have made such but it really makes my head hurt. & it is no fun working that small. The radius alone is simple on a surface grinder with radius & angle dresser. Exact spacing & depth takes moves on the dials that are easy to confuse. Although fundametally on larger cutters you can just come in from both sides until the space is right & then knock off the tip. The process can be used to make shop-generated cutters to approximate an involute gear cutter for one off or emergency repair jobs but that stuff is vanishing rare anymore except in hobby shops.
Anyway, all that would need to be done as well as hang it on the end of a .150 or so extended shank & not nick or break anything.
I‘m not a good enough cue maker to have my practical opinion count for much. But as a woodworker who does not avoid theory, my prejudice against that style pin is elated by Dave’s assessment.
smt
Ed P
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I never use them at the A joint..... I actually was more curious than anything. The other day I was cutting live threads and also had hand threaded for a radial and it just peaked my curiosity. I did not see a practical way of doing this process but just figured I would ask incase I was missing something. But apparently not lol.