Lucasi weight bolt?

H

hejests

AzB Silver Member
Silver Member
Hey Folks,

Just a quick question: does anyone know what size weight bolt (and thread count) Lucasi uses on their newer cues. Looks to about 1/2'' but I have no idea what the thread count is.

Thanks,

Serge
 
hejests said:
Hey Folks,

Just a quick question: does anyone know what size weight bolt (and thread count) Lucasi uses on their newer cues. Looks to about 1/2'' but I have no idea what the thread count is.

Thanks,

Serge
Click to expand...

Edit: After thorough checking I am certain the Lucasi bolts are metric! The thread is M13x2, very rare to find. (Okay maybe somewhat possibly could be BSW 1/2-12" which is just as rare)

An imperial 1/2-13 thread will start to fit loosely but the threads will not match after about 1/2"-3/4", so if you just drive it in, you'll ruin the threads inside the cue.

Imperial 1/2-13" bolts are 12.7mm diameter, 13 threads per inch. M13x2 bolts are 12.7 threads per inch. So you have a difference of 0.3mm diamter and 0.3 threads per inch. That's enough to ruin the inside of the cue if you try to screw it in to the point where that 0.3 threads/inch mismatch binds up the bolt and starts stripping the threads out of the wood. If it's the odd British 1/2-12 bolt it will definitely ruin your day the same.

Another difference is 1/2-13 bolts use a 3/8" hex wrench, which is too big to fit in the 8mm hex socket on the original Lucasi bolts..
=========================

If you want to get the bolts further down in the cue for a more forward balance, I just bought extra Lucasi OEM bolts and ground down the heads with an angle grinder, because finding M13x2 set screws is a tall, tall order.


If you need to manufacture your own you bolt you can buy an M13x2 die and cut the threads into some rod stock. You should be able to get away with using 1/2" (12.7mm) rod stock instead of 13mm as long as you wrap the threads enough in teflon tape that it won't rattle. Mortuarymike-nv below cautions that this carries a risk in that if you wrap too much teflon on, it will exert outward pressure on the cue from the inside which may cause the butt to split. Do at your own risk.

Other than that you're stuck filling in the bolt cavity and drilling it out again for a bolt size you can readily find.
 
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1/2-13, you can get them with hex head or no head bolts, like Viking and Joss uses.
 
It turned out to be 1/2-13. I cut a threaded steel rod to size. 1.5 '' = 1oz and then used my oscillating tool to cut a notch at the top so that I can use it with a screwdriver. I found that 1/2-13 fit a bit too easily so I ended up wrapping the threads a couple of time with orange Teflon tape (the thick type you would use with gas fittings). That worked great. It screwed in nice and tight. I would be shocked if it ever rattled.

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Wieght bolt

hejests said:
It turned out to be 1/2-13. I cut a threaded steel rod to size. 1.5 '' = 1oz and then used my oscillating tool to cut a notch at the top so that I can use it with a screwdriver. I found that 1/2-13 fit a bit too easily so I ended up wrapping the threads a couple of time with orange Teflon tape (the thick type you would use with gas fittings). That worked great. It screwed in nice and tight. I would be shocked if it ever rattled.

Sent from my SM-G920W8 using Tapatalk
Click to expand...

Your lucky you didn't split the butt of your cue , using Teflon tape .
Elmer's glue works and easy to unscrew on the sloppy holes .
You really don't want any outward side pressure inside the butt of your cue.
As in none......................................................
Your cue can crack over a period of time with the constant outward pressure .
I have been doing cue repair work for years , never seen one cue with a weight bolt Teflon tapped in .....................
 
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I was thinking about that as I was doing that... one of those hmmm l wonder if this is a good idea as you continue doing what you were doing moments. I'm going to follow your advice here,. Hopefully I haven't mucked up the threads.

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Be careful!! I really really really think it's M13x2 after checking 1/2-13 bolts and original Lucasi bolts with a digital caliper. Other possibility is that it's the oddball British 1/2-12" thread but that seems even more implausible.

A) Yes, I can thread 1/2-13 set screws and Pechauer weight boltspartially into my Lucasi cues and at first they feel loose but after about 3/4" I can tell the threads are snagging because the thread pitch is mis-matched, and if I forced it I would ruin the threads inside the cue.

B) Trying to put a 1/2"-13 nut on an OEM Lucasi weight bolt, the nut won't thread more more than about 1/2"...

C) The hex drive on an OEM Lucasi weight bolt is 8mm, 5/16". The 3/8" hex wrench that is standard for 1/2" bolts won't even come close to fitting the drive on the Lucasi OEM weight bolts. It could be the british 1/2-12 with a 5/16" hex socket but I'm skeptical since those also almost always use a larger hex size. These being made in China, it's possible the old British tooling is still around but metric seems more likely


I am 99.999% sure the Lucasi weight bolts are M13x2 (2mm between threads = 12.7 threads/inch) and metric spec all the way. A short 1/2-13 bolt (being 12.7mm dia, 13 threads/inch) might go far enough into the larger 13mm bolt cavity to fit securely before the tpi mismatch starts to damage the wood threads, but I'm really worried that people trying to put a longer 1/2-13 bolt in their Lucasi are going to strip out the wood threads if they force it.
 
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hejests said:
I was thinking about that as I was doing that... one of those hmmm l wonder if this is a good idea as you continue doing what you were doing moments. I'm going to follow your advice here,. Hopefully I haven't mucked up the threads.

Sent from my SM-G920W8 using Tapatalk
Click to expand...

These people will tell you what bolt size is used
By phone:
866-843-3294 (between 8:30 a.m. and 5:00 p.m. MST) <<< Lucasi cues <<<<<<
 
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