Omega C760 screws

Discussion in 'Darkroom Equipment' started by limnidytis, Jul 31, 2012.

  1. limnidytis

    limnidytis Member

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    I have an Omega C760 enlarger I bought a few years ago at a school sale. It's missing the thumb screws that secure the color head onto the frame. I've tried every screw I have around the house and none seem to fit. I would like to replace the screws so I can adjust the gap between the head and the negative carrier. Anyone have know the size/pitch of the screws?
    Thanks
     
  2. George Nova Scotia

    George Nova Scotia Subscriber

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    Using different brackets the C760 lamphouse can fit several Omega enlargers. Most have no other model number on them. The only thumb screw I can see in the manual looks like this:
    Thumb001.jpg

    That is for a B66 or B22 enlarger. Which is one I don't have, at least I don't think so. If that's the one let us know, maybe someone will have one.
    Most likely many of the other screws are the same thread. The instructions also mention a black tab bushing.


    George
     
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    limnidytis

    limnidytis Member

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    I have the manuals - the thumb screws are #11 -
    Screen shot 2012-07-31 at 7.14.33 PM.jpg
    I can't find any screw that will thread into the holes. Maybe they're metric. I have a lot of screws in my junk box, but none will fit.
     
  4. MattKing

    MattKing Subscriber

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  5. George Nova Scotia

    George Nova Scotia Subscriber

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    Picture helped. They are 10-32 nylon thumb screws. The threaded portion is 3/4" long. The ones I have look a little different then the manual, the head is smaller in diameter and thicker but they came from the same place on the bracket.


    George
     
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    limnidytis

    limnidytis Member

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    Thanks. Off to the hardware store.
     
  7. George Nova Scotia

    George Nova Scotia Subscriber

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    If you don't have a set of taps maybe pick one up too. Cleaning out rust, paint and dirt with a tap will make things easier.

    George
     
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    limnidytis

    limnidytis Member

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    Thanks. The 10-32 screws worked.
    Johnny