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zewrak · Joined: 25 Aug 2009 Posts: 7 Location: Sweden

Hello,

I decided today to try to fix the shutter of my Speed graphic. When i disassembled the shutter mechanics, it turned out that the head of the retainer screw was almost completly lose from the screw. When I tried to losen the screw, it simply fell off.

So now my screw is lying here on the table in two parts. Is there anyone that know where I can get hold of a spare screw? I have no ways of measure the threads etc. Because the original is in really bad shape. But I got it out of there.

With a new screw, I am quite confident that the shutter will work like a charm.

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45PSS · Posted: Sun Jun 17, 2012 6:36 pm Post subject:

We need a lot more information. Front shutter? Which one? as there were many. Rear shutter? which screw.
This service manual for the Top Rangefinder Speed and Crown Graphic
http://www.southbristolviews.com/pics/Graphic/manual-pdf/servicemanual.pdf
will work for the side rangefinder Speed and Crown also.
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The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

zewrak · Joined: 25 Aug 2009 Posts: 7 Location: Sweden

Its part number 6 on page 3 in that manual for the focal plane shutter. Named "Screw-Retainer". It holds the retaining "washer" of the lower shutter curtain axle.
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We saved paradise, by introducing the serpent.

45PSS · Posted: Sun Jun 17, 2012 8:53 pm Post subject:

That's figure 3 index 6 on manual page 3 (service instructions) or page 29 (Illustrated Parts Breakdown) which says screw-machine and the manual for the side RF says screw-machine special.

It was a special made screw but should be a standard SAE body/thread type.
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The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

zewrak · Joined: 25 Aug 2009 Posts: 7 Location: Sweden

Indeed, part 30213P1

The kind of screw is called a shoulder screw and it is used to keep tension on the shutter axle, by holding the retainer in position.

I could most likely get it manufactured or get hold of a replacement, if i had any idea of the threads etc. But I don't any information about the thread and measurements would be appreciated. Or information about where I can buy a replacement.
_________________
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We saved paradise, by introducing the serpent.

45PSS · Posted: Sun Jun 17, 2012 9:13 pm Post subject:

If you have a digital caliper then measure
1. the body diameter of the old screw or the opening in the plate where it goes
2. the number of peaks or valleys and length of the shaft
or the number of peaks or valleys in the plate where it goes and the thickness of the plate.

SAE screws are in thousands of an inch for diameter and threads per inch for the pitch.

With the measurements one can look up the measurements in a screw chart.
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The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

zewrak · Joined: 25 Aug 2009 Posts: 7 Location: Sweden

45PSS · Posted: Sun Jun 17, 2012 9:28 pm Post subject:

http://www.engineersedge.com/screw_threads_chart.htm
possible size is 2-56; 3-48 (rarely used); 4-40 and might be as big as a 5-40.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.