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Grumpyfck
Joined: 10 Jul 2017 Posts: 7 Location: Plymouth, England
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Posted: Tue Jul 11, 2017 7:48 am Post subject: RB Graflex spring |
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Hi, I am Ashley from England. I am new to this site and new to Graflex. I am in need of a replacement spring or workable bottom roller for my rebuild of a Graflex b. Or, could I cut of the damaged 1/3rd and still have an effective spring? Hope someone can help , thank you xx |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Tue Jul 11, 2017 5:47 pm Post subject: |
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I would not cut out any part of the spring as it will render it unusable.
I untangled a spring in a 3x4 Auto a while back and got it to work.
https://www.flickr.com/gp/thirteenthumbs/zw2Kx5
Another option is to make a new spring using music wire the same diameter as the existing with the same number of turns.
http://www.deansphotographica.com/machining/projects/springs/springs.html
Graflex may have made the spring on the roller shaft by the way its tapered and wound onto the roller shaft.
I have yet to attempt making a new tension spring but have rejuvenated one with the heating stage of the spring making tutorial link. _________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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Grumpyfck
Joined: 10 Jul 2017 Posts: 7 Location: Plymouth, England
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Posted: Tue Jul 11, 2017 11:26 pm Post subject: |
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Thank you, I may have to try the making of if I can't find a replacement, I lost bout 6/7 mm off the tip when it broke, I appreciate the info and help. |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Wed Jul 12, 2017 2:44 am Post subject: |
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Quote: | I lost bout 6/7 mm off the tip when it broke |
I think with that much of the spring gone you're not going to get beyond tension 4 and 1/8 aperture.
Member willysmb is in France and does some excellent restoration work.
http://www.speedgraphic.fr/ _________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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Grumpyfck
Joined: 10 Jul 2017 Posts: 7 Location: Plymouth, England
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Posted: Wed Jul 12, 2017 9:00 am Post subject: |
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the loss of just 6mm off the tip would have that much effect? it was just the little bit that locates in the slot. |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Wed Jul 12, 2017 8:12 pm Post subject: |
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I thought it was 6mm of coil. Reform the end and attach it, should just make 1/8 aperture on tension 6. _________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Wed Jul 12, 2017 9:08 pm Post subject: |
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I have added my Graflex Shutter Servicing and Capping Shutter Servicing to the group of Graflex related material on my google drive.
Free to download
https://drive.google.com/drive/folders/0B1sPJkp-Mdghc0JIYjdQZy05M2M?usp=sharing _________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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Grumpyfck
Joined: 10 Jul 2017 Posts: 7 Location: Plymouth, England
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Posted: Tue Aug 08, 2017 8:38 pm Post subject: |
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I set my spring and roller to Springmasters in birmingham to see if they could make one for me. They sent me a length of off the shelf spring if what looks identical diameter etc. I cut it to length, fitted it with some reservation as it lacked the taper. After some minor adjustments I think it is pretty damn close. I am about to film test so will keep you posted! |
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Grumpyfck
Joined: 10 Jul 2017 Posts: 7 Location: Plymouth, England
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Posted: Sat Aug 12, 2017 6:23 pm Post subject: |
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I have now put through a test roll and the majority seem well exposed and fairly even. Given my lack of experience will these beasties I put the couple of strays down to my novice incompidence. A light leak was present but quickly rectified I hope with replacement felt between camera and 120 film back. I now just need to find a hood and nice filters. thanks for all the advice I am sure I will require more! |
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Grumpyfck
Joined: 10 Jul 2017 Posts: 7 Location: Plymouth, England
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Posted: Fri Sep 08, 2017 6:28 pm Post subject: |
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Quick up date, I fitted the new spring and ran a test roll, wasn't too bad but my newness to graflex settings wasn't great. I ran a second roll as precisly as poss and it went pretty well. All a little under exposed so I have taken a half turn off and "0" drops in just nicely now. Focus was a tad in front so adjusted ground glass upward untill I was happy. round three ready. |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Fri Sep 08, 2017 7:58 pm Post subject: |
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Congratulations on your success.
I surprised you found a spring that would fit and work.
Have you read https://graflex.org/helpboard/viewtopic.php?t=6105
I'm sure a supplier in your area has the materials needed to build the tester. _________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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Grumpyfck
Joined: 10 Jul 2017 Posts: 7 Location: Plymouth, England
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Posted: Tue Sep 12, 2017 8:35 pm Post subject: |
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I sent my old spring to a company in birmingham called Springmasters to see if they could custom make me one, they sent me a 1 meter length of off the shelf spring virtually identical. I cut a peice to size and modified the ends. I contacted them to say all good and how much and got the reply of great don't worry. I wish I knew how to add pictures to show you. |
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45PSS
Joined: 28 Sep 2001 Posts: 4081 Location: Mid Peninsula, Ca.
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Posted: Wed Sep 13, 2017 6:32 pm Post subject: |
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To post pictures upload them to an image hosting site such as Flickr then link to them or embed them with the link provided by the hosting site.[/code] _________________ The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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