View Single Post
 
Old 09-09-2017, 06:36 PM
Bill Ramirez Bill Ramirez is offline
Member
 
Join Date: Sep 2017
Posts: 3
Likes: 0
Liked 0 Times in 0 Posts
Default VC-3 Torque

Gentlemen
I just bought a Victory and also joined this forum. I agree with Echo47 about Loctite. The blue is Anaerobic, it is a liquid when exposed to oxygen. As the screw is tightened the blue is deprived of oxygen and turns into a solid. I'm an engineer in the rocket industry, and we do not use Anaerobic Loctite in our electronics because it can migrate to places and cause issues.

The red Loctite has a methacrylate ester base. Think crazy glue. It is designed for permanent use. It is used by the military in many places, but not in the Abrams tank turret. The reason it that this type of threadlocker can shatter under high shock loads. It doesn't work after shattering. I have had scope mounts get loose with Loctite.

Vibra-Tite VC-3 is used in the Abrams tank. I buy it in a bottle and it also comes in a tube. To use, I degrease the screw, then brush on the VC-3. Do not install the screw! Let the VC-3 dry first. The VC-3 can be applied months before the screw is used. It is rubbery and probably flows into the nooks and crannies between the threads. It cannot shatter. The screw can be re-used many times. This is probably the red patch on the screws S&W has been sending out to fix this problem. I have used VC-3 for several decades and I never had it fail.

The torque on a action screw can affect accuracy. The screw is there to hold the two pieces of metal together even during shock loads. The purpose of the torque is to stretch the screw enough so shock loads, thermal expansion etc, cannot allow a screw to become loose even for a moment. Once a screw is loose it can turn (unless there is Vibra-Tite on it). The rubber o-ring may take up the slack, keeping the load on the screw, but probably not enough to keep the barrel and frame as tightly together as a torqued screw would. A Belleville Washer would be a better choice, offering greater force. I believe I saw some at Ace.

I would suggest the VC-3 without the O-ring and toque it down. Test to see how much the amount of torque affects accuracy. If you can't get to the store for the VC-3 in time, go look at a gun magazine (the kind you read). Find an add which is glued in the magazine with that strip of that snot stuff. A single wrap stretched around the threads worked for me a while back.
Reply With Quote