Diagonal doesn't clamp properly

[bish789]

Hi all

Have an Altair Astro 1.25 diagonal, that when clamped on any of my scopes just spins and doesn't hold.

The tubing which goes into the clamping area is quite shiny.

Wondered if I took the shine off it with some 400 grit the compression clamps would grip better?

Any else had this problem before I  start sanding?

[johninderby]

Not a usual problem but first do your scopes have compression bands that clamp,the diagonal or just scews?

Also is the barrel on the diagonal loose at all? Is it screwed in tightly.

 

Edited December 5, 2021 by johninderby

[bish789]

Hi John

Compression bands and all firm.

Will get callipers out just to make sure they are the right size.

[banjaxed]

I found that longer knurled head screws is a big improvement over the tiny head supplied ones as you can ache a much better grip.

[ScouseSpaceCadet]

41 minutes ago, bish789 said:

Hi all

Have an Altair Astro 1.25 diagonal, that when clamped on any of my scopes just spins and doesn't hold.

The tubing which goes into the clamping area is quite shiny.

Wondered if I took the shine off it with some 400 grit the compression clamps would grip better?

Any else had this problem before I  start sanding?

I had the same problem but simply hand tightening the nose piece really tight into the body sorted it.

[bish789]

Thanks all.

Will give it a go in a min.

Clear skies here at moment

[bish789]

It was the nosepiece.

Tightened and blob of blue loctite added.

Thanks all.