Uni-Loc pins, are they 5/16-14?

cmb said:
and if so would you drill a 1/4 inch hole to tap?
Thanks CMB
Click to expand...
The end thread on the Uni-locs that I have installed were 5/16-14 thread on the end. Yes I would drill a 1/4" hole then tap it. Then come back with a miniature boring bar and bore the hole for the alignment shoulder.
 
cmb said:
and if so would you drill a 1/4 inch hole to tap?
Thanks CMB
Click to expand...
Are you talking about the threads for the insert or the ones for going into the butt of the cue?
 
The following is for a Uni-Loc pin for the cue butt. The shaft insert is a different procedure.
-Drill to a minimum depth of 2.3" with 17/64" drill bit (.2656")
-Tap to a depth of 2.1" with a 5/16x14 tap
-Bore to a depth of 1.14"x .3125" to .313" diameter
-Re-tap to remove burrs
-Install pin to shoulder, using epoxy.
-Coller or counterbore for shaft insert is .205" to .215" high by .510" to .520" in diameter.

All this according to my installation procedure from Uni-loc.

Regards,
Frank
 
Jr's Farm said:
The following is for a Uni-Loc pin for the cue butt. The shaft insert is a different procedure.
-Drill to a minimum depth of 2.3" with 17/64" drill bit (.2656")
-Tap to a depth of 2.1" with a 5/16x14 tap
-Bore to a depth of 1.14"x .3125" to .313" diameter
-Re-tap to remove burrs
-Install pin to shoulder, using epoxy.
-Coller or counterbore for shaft insert is .205" to .215" high by .510" to .520" in diameter.

All this according to my installation procedure from Uni-loc.

Regards,
Frank
Click to expand...

Interesting that it would say 17/64's instead of a -F- drill bit. (.257) which is usually used for a 5/16 thread.
 
Michael Webb said:
Interesting that it would say 17/64's instead of a -F- drill bit. (.257) which is usually used for a 5/16 thread.
Click to expand...

F drill for a 5/16-18 thread. For the finer threads in 5/16 the drill size gets bigger too, but for metals. My chart doesn't even list the 5/16-14 as a thread size.

IMHO, when tapping wood, as opposed to live tooling for threads, the minor diameter or drill size should be slightly larger anyhow, as most woods will just chip off at the sharp edge of the thread most of the time anyway.

Of course, YMMV.

Regards,
Frank
 
Jr's Farm said:
F drill for a 5/16-18 thread. For the finer threads in 5/16 the drill size gets bigger too, but for metals. My chart doesn't even list the 5/16-14 as a thread size.

IMHO, when tapping wood, as opposed to live tooling for threads, the minor diameter or drill size should be slightly larger anyhow, as most woods will just chip off at the sharp edge of the thread most of the time anyway.

Of course, YMMV.

Regards,
Frank
Click to expand...

Thanks Frank, Just curious because the chart says for 5/16X18 use and -F- drill and for 5/16X24 use a -I-drill so it went up in size do to more threads not less.
 
I play with a Predator cue that has been changed over to 3/8 by 10 brass pin from Predators uni loc style pin and the cue plays much better than before. I can't leave it alone for any of my other higher dollar cues even when using the same shafts.--Leonard
 
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