Finder Bracket, Rubber ) 0 Ring

[glowjet]

I am sure this must have cropped up many times before, but I have heard that replacement rubber 0 rings for the SW finder bracket are difficult to come by, as standard manufactured 0 rings are too thick. Can anyone offer any help for a suitable source to get a replacement ? thanks.

[Steve Ward]

http://www.polymax.co.uk/o-rings/rubber-nbr-oring/

[SnakeyJ]

http://www.polymax.c...bber-nbr-oring/

Nice link Steve, but does anyone happen to have the correct ID and CS measurements for the original SW 9x50 finder (I'm using the rubber band method ATM).

[glowjet]

Thanks Steve, but regret one 0 ring, which is available in the correct size by the way, would cost 0.11p but + £10, because of their minimum order policy

[Steve Ward]

So buy a hundred and sell them on ...... ...... Or get one off Astroboot , in stock in pairs so you can use one and keep a spare . . .

[glowjet]

Nice link Steve, but does anyone happen to have the correct ID and CS measurements for the original SW 9x50 finder (I'm using the rubber band method ATM).

I have just measured the one in my other mount and the measurements are..... cross section 1.75mm x 48mm internal dia, this will stretch to over 50mm+ when fitted on the finder scope.

[SnakeyJ]

I have just measured the one in my other mount and the measurements are..... cross section 1.75mm x 48mm internal dia, this will stretch to over 50mm+ when fitted on the finder scope.

Many thanks John - will have a search around, but may just be able to pick one up from a local autofactor or similar.

[John]

Astroboot has some of the 2" "O" rings at the moment:

http://www.scopesnskies.com/AstroBoot

I've made some of my own by cutting rings from an old bicycle inner tube.

[Steve Ward]

" Astroboot has some of the 2" "O" rings at the moment "

As I said an hour ago , must have used the invisible font again .......

[John]

" Astroboot has some of the 2" "O" rings at the moment "

As I said an hour ago , must have used the invisible font again .......

I saw your post but I thought a link would help

[astro mick]

I use either a small twisted rubber band,or i cut thin lengths of coloured electrical tape(to match the tube) wrap it around the tube where the ring goes until you achieve a nice snug fit.

Mick.

[Nibor]

I found that my local plumber's merchant had a really wide selection of "O" rings - worth a try??