8mm Forum: bolex conversion

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Posted by Jim Schrader (Member # 9) on September 16, 2010, 10:48 AM:

while converting my bolex to the three belt sysyem from the single flat belt i noticed my claw dose not work the same as it used to it makes noise and while it seems to work in forward it does not work in reverse does the claw arm have to be in a certain position in this spindle to operate properly?
Thanks for any info. jim

Posted by Thomas Dafnides (Member # 1851) on September 16, 2010, 11:00 PM:

What was wrong with the original single belt system?

Posted by Jim Schrader (Member # 9) on September 19, 2010, 03:35 PM:

could not find a belt plus it always slipped

Posted by Thomas Dafnides (Member # 1851) on September 19, 2010, 03:50 PM:

Try Bolex in Switzerland, they might still have the belts or could give you a source.

Posted by Graham Ritchie (Member # 559) on September 19, 2010, 06:01 PM:

Jim
If you are unable to get the right belt I would check out any Seal Importers locally. I found a place out here called SIL Importers they stock hydraulic and pheumatic seals, O Rings and bushes they were brilliant to deal with and easily matched new O rings for my ST1200 and ST180 for less than $2 each with a huge range of sizes to choose from. I just needed the old one for them to measure and match. The material is EPDM {Ethylene Propylene rubber} and works well.

Graham.

Posted by Paul Adsett (Member # 25) on September 19, 2010, 07:02 PM:

Parker Seal Corpn. in the USA stock a huge range of o-rings in a large variety of materials. They have distributors all over the country - just go to their web site. I got 3 Butyl rubber 0- rings for my Bolex 18-5 from them about 20 years ago, and they are still like new. Graham mentioned Ethylene Propylene (EPDM) which is also an excellent material. Both Butyl and EP rings are extensively used in military and aerospace applications and will just about last forever. Make sure you get 50 or 60 durometer (hardness) rings for the smoothest running in the Bolex..

Posted by Barry Fritz (Member # 1865) on September 20, 2010, 02:35 PM:

The O rings work very well on the three belt projectors, but the one Jim has is a very early model. Unlike the later 3 belt models, the single belt model did not have grooved or V pulleys. Both the large and small pully were flat with no edges. I do not believe an O ring, would stay on the flat pullies.

Posted by Jim Schrader (Member # 9) on September 20, 2010, 08:50 PM:

Thanks for all your help barry gave me 2 bolex's to play around with I took my old belt and placed it on one of these + took some parts off the other one to make it complete and all seems to work well i will run a film leader through it tomorrow to see if it handles it fine. in the mean time if anybody needs parts for your bolex let me know i may part out with these units sincce they are so heavy to ship complete.

Posted by Bryan Chernick (Member # 1998) on September 21, 2010, 11:25 AM:

Do you have any of the Bolex emblems that always fall off? I need the one that goes on the projector, not the cover.

Posted by Jim Schrader (Member # 9) on September 21, 2010, 01:00 PM:

let me look i do not remember seeing any but let me double check and get back to you.

Posted by Thomas Dafnides (Member # 1851) on September 21, 2010, 10:15 PM:

How about a 20mm or 25mm prime lens?

Posted by Jim Schrader (Member # 9) on September 22, 2010, 10:47 AM:

ok here is what is available the units i got have no labels or lenses.This is what would be available.

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