This is topic ST1200HD Belt Blues in forum 8mm Forum at 8mm Forum.


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Posted by Mathew James (Member # 4581) on December 30, 2014, 09:36 AM:
 
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Hi All,
Well this picture above would not be a big deal normally, except for one thing.....
The belt is less than a month old [Smile]
The weird thing is that the belt does NOT seem 'cheap' to me and is from a reputable belt seller(that many use here)....
So this leads me to wonder if perhps putting a new belt on will yield similar results. I am 99.9% sure the belt was installed correctly. It worked great for a month, but I only played maybe 20-30 films only.....
Any thoughts??
Cheers,
Matt
PS: Thank Goodness I still have my trusty St180, or I may have gone through Super 8 Withdrawal!!!!
 
Posted by Steve Klare (Member # 12) on December 30, 2014, 10:01 AM:
 
Could just be a defective belt. (Nobody, and nothing is perfect!)

The belt material seems to be broken on an angle and a clean cut, just like the splice that made a loop out of it wasn't properly glued.

Why not contact the seller and see what he says about it?

-and let us know what happens.
 
Posted by Mathew James (Member # 4581) on December 30, 2014, 02:41 PM:
 
Could be Steve. That pic i posted could have been clearer i suppose, and closer to show that it actually wasn't a very clean break. Almost the kind of break as if you stretched it until it snapped. I already ordered a new belt this morning(from who you recommended in another post and from whom i got the counter belt from 'isellprojectorbelts'), so i am anxious to receive that.
I wonder if anyone has had success glueing them. I tried with loctite super glue earlier and it seems to be strong again, so maybe for fun while i await the newer belt, i can see how long it might hold, or not... [Smile]
Cheers,
Matt
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Posted by Andrew Woodcock (Member # 3260) on December 30, 2014, 04:50 PM:
 
Test the drive by hand Matthew while the belt is off to see if the drive is all free to turn with no "binding or tight spots".

You will have to do this in all modes to fully test.
 
Posted by Graham Ritchie (Member # 559) on December 30, 2014, 08:39 PM:
 
Belts that have been stored for quite a few years, can as shown just fall apart. That stuff does have a shelf life.

What I have done for all my projectors, including the Bauer 35mm, platter drives as well as with Super8 machines, is to buy EPR O-Rings "Ethylene Propylene Rubber" bought over the counter at Seal Imports here in the city. The staff will measure your old one and match it to the large range they have in stock.

Those EPR seals are "very cheap" to buy and have good grip. People do buy them for all kind of applications....might be worth checking out locally.
 
Posted by Paul Adsett (Member # 25) on December 30, 2014, 10:46 PM:
 
Ethylene-Propylene rubber is an excellent material for o-rings or rubber belts. It is noted for its long life, very wide operating and storage temperature range, and its resistance to many common greases and lubricants. Another superb material is Butyl B612 rubber. Both these materials are commonly used in the most stingent applications of military electronics and mechanical hardware. I replaced the belts of my Bolex 18-5 with Butyl rubber o-rings over 20 years ago, and they still look and run like new. I think the problem here is poor choice of material.
 
Posted by Mathew James (Member # 4581) on December 31, 2014, 09:15 AM:
 
I think these are great ideas! Than very much.
I never realized we could try different materials.
I wonder if there is any sort of place similar to Seal Imports here in Hamilton, Ontario.
I will do some research!!
Cheers,
Matt
PS: I also want to eliminate any seized parts that could be causing this....
 
Posted by Paul Adsett (Member # 25) on December 31, 2014, 01:10 PM:
 
Mathew, get in touch with Parker Seal Corpn. They manufacture and distribute thousands of O-ring sizes in a wide variety of materials, including EP and Butyl. If you look at their catalog you will certainly be able to find an O-ring that will fit perfectly on your projector.
 
Posted by Mathew James (Member # 4581) on January 09, 2015, 10:13 AM:
 
Just to update this 'project, i wanted to mention that with the 'super-glued' belt, I was able to watch exactly 1.5 400' reels [Smile] (so 600' approx). That was all before it broke!!!
Anyways, I have ordered another belt and am waiting for that, and have not yet looked into the oring, but will also do that and i will report here any 'local' distributors in case anyone else in these parts wants a stronger belt solution.
 
Posted by Andrew Woodcock (Member # 3260) on January 09, 2015, 01:00 PM:
 
Have you definitely eliminated any possible "Binding" throughout the drive chain Mathew?
This question has no bearing on your repaired belt snapping almost immediately Matthew as it is almost impossible to repair a belt once snapped.

[ January 10, 2015, 04:11 AM: Message edited by: Andrew Woodcock ]
 
Posted by Mathew James (Member # 4581) on January 10, 2015, 01:29 AM:
 
Hi Andrew,
Call me Matt! My full name is actually Mathew, with one 'T', but I do prefer Matt best, unless you are mad at me, then you should call me Mathew, like my mother does when mad [Smile]
What i did was turned by hand the moving parts the belt is associated with, and it 'seems' to move freely. Is there anything else i can try to be sure? Thanx,
Matt
 
Posted by Andrew Woodcock (Member # 3260) on January 10, 2015, 03:46 AM:
 
Apologies Matt for the two "T's". No I am sure all will be fine then once you fit a decent belt such as the ones suggested by Paul. Just make sure the alignment between pulleys is also spot on when fitting your new belt as this also can cause problems with premature wear
 


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