EEVblog Electronics Community Forum
Products => Thermal Imaging => Topic started by: Elk-ECE56 on July 01, 2020, 11:50:56 pm
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Hi guys! It's been a while since I've been on the forum but I picked up a 2000as core off of ebay and have the lens from an older one I had, however I seem to have lost the screws that hold the lens to the core :( I'm going to dig around my garage and look for them but I just wanted to know if anybody knew the size and what they're called so I could order some? If I remember correctly they were hex headed but it's been over a year since I used this camera but I reckon as a last resort if I knew the size I could order some, so I thought I'd ask here. Thanks in advance!
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Yes, hex fitting in a 2-56 size.
regards
Bill
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Bill,
You never cease to amaze me with your extensive knowledge :-+ I was going to check my units screws but realised the thread would be imperial UNF or UNC and I do not have imperial thread gauges.
Fraser
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Bill,
You never cease to amaze me with your extensive knowledge :-+ I was going to check my units screws but realised the thread would be imperial UNF or UNC and I do not have imperial thread gauges.
Fraser
Just reading off the drawing.... ;), mainly to warn those who bought my spare AS2000's to keep good care of the screw.
It was bad enough trying to get US screws for the Raytheon kits when we were building cameras at EEV. The optic block mounting holes were tricky to get as well.
Bill
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I am not disagreeing with the 2-56 assignment; however,when dealing with optical devices in particular, one must be aware of the possibility of a Whitworth thread. If a standard 2-56 fits and feels OK, that is probably correct as 56 pitch is not a standard Whitworth pitch.
In my experience, an imperial fastener in a Whitworth thread of the same pitch will feel loose. Wikipedia lists the standard Whitworth pitches. Scan down to where it mentions current uses: https://en.wikipedia.org/wiki/British_Standard_Whitworth
One can come across them in strange places. My Harbor Freight horizontal band saw uses a 1/2" screw as a pivot. It measures 1/2-12, which is a Whitworth pitch. There is no standard 12 pitch imperial screw. Don't lose those screws. There are 2 of them. :)
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Thank you so much! I thought I would never figure this out, I appreciate your help.