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Best way to repair a broken finderscope bracket?

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12 replies to this topic

#1 ericb760

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Posted 09 July 2024 - 02:59 AM

One of the scopes I picked up recently arrived with broken finderscope bracket. The break is very clean and I can put the pieces back together so well that I can't even see the break. I'm thinking that JB Weld is the way to go here. Will that work, or is there a better way to put these pieces back together?

Finderscope Bracket

 



#2 luxo II

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Posted 09 July 2024 - 06:51 AM

I would buy a new pair of rings from AliExpress - they're only a few dollars - then if necessary drill and tap holes to suit that bracket.

 

See for example https://www.aliexpre...rch|query_from:

 

... there are many more...


Edited by luxo II, 09 July 2024 - 06:57 AM.


#3 AstroPhotog

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Posted 09 July 2024 - 07:27 AM

It looks like metal. +1 J-B Weld, I used it to attach supports to stiffen an eq-2 tripod almost 40 years ago and it's still there. smile.gif


Edited by AstroPhotog, 09 July 2024 - 07:36 AM.

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#4 clamchip

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Posted 09 July 2024 - 09:31 AM

When the parts fit back together well like your example I use Superglue.

I got the idea from nurse Mendy. She made me a believer when she glued a broken C8 bracket for me to test to destruction. That was a long time ago and still holding fine.

Robert

 

post-50896-0-08358600-1624639274.jpg

post-50896-0-78004600-1624639350.jpg

post-50896-0-97050700-1492553436_thumb.jpg


Edited by clamchip, 09 July 2024 - 09:36 AM.

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#5 mich_al

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Posted 09 July 2024 - 09:42 AM

My experience with superglue is that it deteriorates in a few years and the pieces fall apart.   Maybe superglue to hold the pieces together then JBWeld or epoxy repair extending a bit in both directions from the break.


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#6 Orion68

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Posted 09 July 2024 - 03:29 PM

An epoxy like JBWeld should do the trick.  I received a scope from Goodwill with the same type of damage. Using epoxy fixed it and it is still holding.


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#7 Bungee

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Posted 09 July 2024 - 10:51 PM

It's tedious work, but I drill and pin my pieces before JB'ing them. Drill the holes a little larger than the pin material, dry fit to check the alignment, then coat the pins and mating surfaces. Little wire nails make great pin material.


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#8 mich_al

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Posted 10 July 2024 - 09:30 AM

It's tedious work, but I drill and pin my pieces before JB'ing them. Drill the holes a little larger than the pin material, dry fit to check the alignment, then coat the pins and mating surfaces. Little wire nails make great pin material.

How do ya properly locate a pin for a repair like this ?



#9 1939Dodge

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Posted 10 July 2024 - 09:39 AM

Use plain old epoxy. It will work fine, and allow EXCELLENT alignment of the pieces.


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#10 NinePlanets

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Posted 10 July 2024 - 09:44 AM

Yep. Super Glue is temporary. You might get 3 years out of it, base on extensive experience with coffee cup handles...

 

If you don't to replace it, and you don't want to drill it and screw it, then I wouild go with the JB Weld - nice globs all around both pieces at the joint.


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#11 MarkMittlesteadt

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Posted 10 July 2024 - 09:51 AM

JB Weld. I cut apart my my 8X50 RACI finderstalk to drastically shorten it. I removed the center section and then put the top and bottom together with JB Weld for metal. 

 

I did drill and tap holes for threading small bolts in through the bottom, but they aren't really necessary. I think I did it because I was impatient and wanted to use it shortly after it dried to the touch, but not yet fully cured.

 

bolts-in-stalk-base.jpg

 

Finder-done-e1703861880336.jpg


Edited by MarkMittlesteadt, 10 July 2024 - 10:09 AM.

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#12 Bungee

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Posted 10 July 2024 - 11:12 PM

How do ya properly locate a pin for a repair like this ?

I look for the thickest section and use micro bits.

Here's my latest repair. You can see the part was very small. The pins add strength without leaving a glob of cement.

 

20240710 230207

 

 

20240710 230218
 
Some day I'll touch that with a little black paint

Edited by Bungee, 10 July 2024 - 11:17 PM.

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#13 ericb760

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Posted 11 July 2024 - 03:21 AM

JB Weld. I cut apart my my 8X50 RACI finderstalk to drastically shorten it. I removed the center section and then put the top and bottom together with JB Weld for metal. 

 

I did drill and tap holes for threading small bolts in through the bottom, but they aren't really necessary. I think I did it because I was impatient and wanted to use it shortly after it dried to the touch, but not yet fully cured.

 

bolts-in-stalk-base.jpg

 

Finder-done-e1703861880336.jpg

This mod makes a lot of sense. Thanks for the idea.


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