In search of a radial tap

Michael Webb said:
I saw one last week like this. Direct from Predator. The phenolic they're using is the real problem. It's so hard, it's brittle and because of that, it's tolerances seem to be different. I use a lot of the brown phenolic, rolled and molded to make inserts. I also tried the black phenolic also rolled and molded. The black is different for some reason. I also tried the 7/8" black solid rod. So hard it's brittle.
Click to expand...

Sorry to revive this old thread, but I'm also encountering "radial" shafts that appear to be tapped for american ball thread and not true radial. But why are there some shafts that fit both (radial and american ball screw) just fine?

Radial is 3/8x7.65 and "American Ball" is 3/8x8. Do the shafts I've tested that fit both OK (at least as far as I can tell) simply have sloppier wood threads? CF shafts with phenolic plugs seem to be the most difficult. Thanks.
 
kling&allen said:
Sorry to revive this old thread, but I'm also encountering "radial" shafts that appear to be tapped for american ball thread and not true radial. But why are there some shafts that fit both (radial and american ball screw) just fine?

Radial is 3/8x7.65 and "American Ball" is 3/8x8. Do the shafts I've tested that fit both OK (at least as far as I can tell) simply have sloppier wood threads? CF shafts with phenolic plugs seem to be the most difficult. Thanks.
Click to expand...
The American ball screw is actually the same thread as the radial. Name changed for legal reasons.
The 3/8 x 8 ball screw, I believe started over seas, then Schmelke offered it as well as selling the Joint screws and Tap.
As to why some fit both. I have no idea. The shafts fitted for a radial that I've used a 3/8x8 on still confuses me a little because I use a standard 3/8x8 Vee pitched tap I had made to make shafts for Harvey Martin cues. It's a strange circle.
Jmo
 
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Michael Webb said:
The American ball screw is actually the same thread as the radial. Name changed for legal reasons.
The 3/8 x 8 ball screw, I believe started over seas, then Schmelke offered it as well as selling the Joint screws and Tap.
As to why some fit both. I have no idea. The shafts fitted for a radial that I've used a 3/8x8 on still confuses me a little because I use a standard 3/8x8 Vee pitched tap I had made to make shafts for Harvey Martin cues. It's a strange circle.
Jmo
Click to expand...

Thanks. Any suggestions for dealing with "radial" shafts of unknown origin to know if they are proper 3/8x8, import 3/8x7.65, or just a CF phenolic insert with weird tolerances? It's these CF shafts that seem so weird--I have proper radial butt pins that fit fine in most radial shafts, but I have third-party CF shafts where the fit is way off.
 
kling&allen said:
Thanks. Any suggestions for dealing with "radial" shafts of unknown origin to know if they are proper 3/8x8, import 3/8x7.65, or just a CF phenolic insert with weird tolerances? It's these CF shafts that seem so weird--I have proper radial butt pins that fit fine in most radial shafts, but I have third-party CF shafts where the fit is way off.
Click to expand...
I'd like to know also. I bought a radial shaft, for what I thought was a radial pin cue, but it gets extremely snug about halfway screwed together.
 
I hear ya. It's tough action because everyone wants a piece of the pie so to speak.
(YOUR MONEY) hahahaha
The short answer is this,
Whether they make the shaft threads with an undersized tap or regular tap. Even the one's that live thread. The spec sheet for radial suggest using a 5/16" reamer.
It's amazing how many are to cheap to buy one.
No secret, drill bits vary in size!
If the shaft is tapped for the 3/8x8, it shouldn't go on past a few threads.
There's a lot of chef's in the kitchen nowadays.
Even Joe Blow who has no clue what he's really doing, thinks he has the right to your wallet. You might be saving 50 or 100 bucks but are you really saving.
Buy Reputable!
 
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Michael Webb said:
I hear ya. It's tough action because everyone wants a piece of the pie so to speak.
(YOUR MONEY) hahahaha
The short answer is this,
Whether they make the shaft threads with an undersized tap or regular tap. Even the one's that live thread. The spec sheet for radial suggest using a 5/16" reamer.
It's amazing how many are to cheap to buy one.
No secret, drill bits vary in size!
If the shaft is tapped for the 3/8x8, it shouldn't go on past a few threads.
There's a lot of chef's in the kitchen nowadays.
Even Joe Blow who has no clue what he's really doing, thinks he has the right to your wallet. You might be saving 50 or 100 bucks but are you really saving.
Buy Reputable!
Click to expand...

So on the CF shafts with phenolic inserts, do you think the manufacturer is undersizing the hole (by not reaming) so the minor threads of the taped thread are too tight (not deep enough)?
 
kling&allen said:
So on the CF shafts with phenolic inserts, do you think the manufacturer is undersizing the hole (by not reaming) so the minor threads of the taped thread are too tight (not deep enough)?
Click to expand...
I can't answer for anyone else
But
Based on my own experience. Phenolic machines tighter than wood, meaning less forgiven. Using the reamer is crucial. Based on the Radial screws design, a couple of thousanths is HUGE!
 
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