Old Broken OM bellows wanted...
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Old Broken OM bellows wanted...
What I really need is one little screw - the one which holds the bellows to the front standard. Does anyone have one of these screws spare, or alternatively know the specifications of the screw? Cheers!
Do you mean one of the 4 which go through a thin plate with a big hole in the middle?
You could invest in a whole box of watchmakers screws, something like
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0627387606
The threads aren't actually critical. If they're tight they go in and stay in just fine!
You could invest in a whole box of watchmakers screws, something like
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0627387606
The threads aren't actually critical. If they're tight they go in and stay in just fine!
- rjlittlefield
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Re: Old Broken OM bellows wanted...
I just measured one. It's a small but standard metric thread: 2.50 mm outside diameter x 0.45 mm pitch.lauriek wrote:or alternatively know the specifications of the screw?
--Rik
- rjlittlefield
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Digital caliper. The thread pitch was a bit troublesome because my metric thread gauge only goes down to 0.5 mm. So I resorted to measuring 4.5 mm for 10 turns, viewing under a stereo dissecting scope at 10X or so. After that, some reassurance was provided by http://en.wikipedia.org/wiki/ISO_metric_screw_thread, which tells me that 2.5 mm diameter x 0.45 mm pitch is indeed a standard metric "coarse" thread.
--Rik
--Rik
Also, Small Parts might be a good source, e.g. this is a pack of 100 16-mm long steel screws, M2.5-0.45 for about $5:
http://www.smallparts.com/dp/B000NHSAIO ... p_g2c_asin
(they have also other materials, e.g., nylon, etc.)
Rashid
http://www.smallparts.com/dp/B000NHSAIO ... p_g2c_asin
(they have also other materials, e.g., nylon, etc.)
Rashid