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View Full Version : Retention bolts for limb bolts-Are they necessary?



CarlosII
05-29-2012, 08:11 AM
I've had other bows that had small bolts that are designed to keep the limb bolts from backing out. There's no such small bolts on my Scepter V. The previous owner of my Shadowcat had placed nylon bolts in the threaded holes in the riser that made contact with the limb bolts in order to keep the bolts from backing out, I guess.

My question is, are these retaining bolts necessary or not?

gstudt
05-29-2012, 10:24 AM
I've had other bows that had small bolts that are designed to keep the limb bolts from backing out. There's no such small bolts on my Scepter V. The previous owner of my Shadowcat had placed nylon bolts in the threaded holes in the riser that made contact with the limb bolts in order to keep the bolts from backing out, I guess.

My question is, are these retaining bolts necessary or not?


Necessary? That can be debated.

Can they move. Yep! Will they move?

Do I lock them down with a set screw. Yes! 100% of them.

bfisher
05-29-2012, 10:52 AM
They are only necessary if a bow shows a tendency for the limb bolts to back out due to vibration. Are they an absolute must? Not really. It depends on what your bow does. I use the ones with a brass tip as they work better than those with nylon, but I don't use them on every bow.

ftshooter
05-29-2012, 05:27 PM
I have never had them on my Martins and never had needed them..If bolts tend to back out ,,I guess a guy could use a little blue loc tite....

Speedykills
05-29-2012, 08:14 PM
i would say no,but you never know..............:D

Phantonza
06-01-2012, 12:08 AM
At least if you don't use max. pounds, you should put marks on your limb bolts so you can follow if they keep their position or not. If you use max. pounds, it is of course easy to observe by occasionally turning the bolts if they are fully screwed in or not. I also have a feeling (not sure though) that there is less tendency to creep if the limb bolts are fully screwed in.

I have an Onza 3 that I have set to 56 pounds and the limb bolts have the tendency to back out when shooting if the retention bolts are not installed. So I use the retention bolts with a nylon tip (I don't quite understand Bfisher's point about brass tipped bolts - I have had zero problems with nylon tips and they won't ruin the threads of the limb bolts).

andy_camping
06-01-2012, 08:54 AM
Can someone take a picture of these bolts and where they go? I think my limb bolt is backing out a bit after shooting. It's not alot but I'd like to stop that.

bfisher
06-01-2012, 03:33 PM
I've already posted pics. It was probably a couple years ago. I'll see if I still have the pics on my othe laptop.

Phantonza, the reeason I say brass tips is because they can be tightened down tighter and hold better. Depending on how much vibration gets into the riser the nylon tips don't hold as well because the nylon compresses. There is a thread about this, too. I believe it's the same thread as the pics are on. I'll see if I can dig it up.

bfisher
06-01-2012, 03:47 PM
OK, the thread is entitled "Why Do Limb Bolts Back Out" dated 3/31/11. The pics are on page 2. The thread has some other suggestions, too, such as a lead bead inserted into the barrle nut and a regular set screw tightened down. The lead bead keeps the set screw from mashing the threads on the limb bolt.

bbjavelina
06-01-2012, 05:22 PM
A .177 pellet dropped in the hole before the setscrew works well. I'm sure there is a size of shot (maybe BB) that would work even better. Surely no chance of damaging the limb bolt --- like if you use nothing.

Best of luck to you.

Hutch~n~Son Archery
06-01-2012, 08:21 PM
Good idea bbjavelina








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