How to affix/stabilize the side-viewing mirror, once focused, to the end of my Teslong bore scope rod

[Cassidy]

The small side-viewing mirror screws/affixes onto the end of the bore scope probe (rod), and the mirror image on the screen is focused by screwing the mirror in more or less on the rod threads until the image becomes focused. However, in my experience keeping it in focus while proceeding down the bore can be a problem since the mirror attachment is not snug on the screw threads can somewhat unscrew or screw in farther while in the bore rendering the image on the screen out of focus. To resolve this problem I am thinking about using a touch of low strength (222) Locktite on the rod end threads to keep the mirror attachment from changing its position on the screw threads once focused. Does this seem like a reasonable approach to fix this problem? All thoughts are welcome. Also, is a 60 degree mirror attachment available to look further down the bore?

 

[Mike Casselton]

It should have a tiny, threaded lock ring. Look in the bag of extra mirrors

 

[Dave in WI]

Teflon plumbers thread tape?

 

[JMayo]

It has a tiny lock ring on threads. It's hard to see if all the way down.

 

[PhilC]

When tightened the lock ring looks like part of the threaded mirror ferrule, loosen it, focus to the bore, then tighten lock ring and the mirror won't move.

 

[Cassidy]

Mike, JMayo and PhilC, please see the two pics below. I do not see a lock ring. You can barely see a tiny ring at the end of the rod before the threads start but I have not been able to loosen it with needle nose pliers so I think it may not be a lock ring. Any thoughts?

 

[Rimfire-CA]

Mike, JMayo and PhilC, please see the two pics below. I do not see a lock ring. You can barely see a tiny ring at the end of the rod before the threads start but I have not been able to loosen it with needle nose pliers so I think it may not be a lock ring. Any thoughts?

It appears like your lock ring is missing.

 

[JMayo]

That's not it. It seems yours is missing. Look around in the floor where you took the mirror off the first time.

 

[Cassidy]

Hmmm. Maybe I can order it separately (??)

 

[yukonal]

your lock ring is not on the shaft.

 

[ebb]

Mine came with the mirror in the right position, did not need focusing, or tightening. It has worked properly since day one.

 

[JMayo]

https://teslong.com/Rifle-Borescope/rifle-bore-scope

I'd email them. Maybe they'll send you one.

 

[Cassidy]

I found the lock rings on teslong's website and ordered one (they come in sets of 3s)

 

[Kracken McGraw]

I found the lock rings on teslong's website and ordered one (they come in sets of 3s)

It’s easy to accidentally lose if you do any viewing without the mirror.