Film-Tech Cinema Systems
Film-Tech Forum


Post New Topic  Post A Reply
my profile | my password | register | search | faq & rules | forum home
  next oldest topic   next newest topic
» Film-Tech Forum   » Operations   » Film Handlers' Forum   » Century C clutch pad

   
Author Topic: Century C clutch pad
Luci Reeve
Film Handler

Posts: 50
From: Telluride, CO, USA
Registered: Feb 2006


 - posted 06-16-2008 12:58 PM      Profile for Luci Reeve   Author's Homepage   Email Luci Reeve   Send New Private Message       Edit/Delete Post 
Six months ago my 6k feed reel clutch caused the film to stop. It is located inside the lamphouse base. I called Ross Krantz who talked me through removing and cleaning the felt pad with lighter fluid, reassembling the clutch and everything was fine. A few days later I had to clean the pad on the other projector. I had to clean them again last night!

Where is the black grease coming from? What is the best cleaning method?

 |  IP: Logged

Dan Lyons
Jedi Master Film Handler

Posts: 698
From: Seal Beach, CA
Registered: Sep 2002


 - posted 06-16-2008 02:53 PM      Profile for Dan Lyons   Email Dan Lyons   Send New Private Message       Edit/Delete Post 
Are you running the clutch pads dry or oiled? Is it possible that heat is building up inside the base and causing the oil on the pad to gum up?

I've always run my feed arm (with 6k reels) dry with very low tension and never had any problems.

 |  IP: Logged

Luci Reeve
Film Handler

Posts: 50
From: Telluride, CO, USA
Registered: Feb 2006


 - posted 06-17-2008 01:06 PM      Profile for Luci Reeve   Author's Homepage   Email Luci Reeve   Send New Private Message       Edit/Delete Post 
The clutch pads on the take up reels look white and dry. These are black and very very greasy, grease is dripping off of them. I'm thinking of putting them through the laundry or something. Ross did say to oil new ones when installing but why couldn't I wash off these ones?

 |  IP: Logged

Tim Reed
Better Projection Pays

Posts: 5244
From: Northampton, PA
Registered: Sep 1999


 - posted 06-17-2008 01:42 PM      Profile for Tim Reed   Author's Homepage     Send New Private Message       Edit/Delete Post 
Go ahead and wash them. Save the $5.

 |  IP: Logged

Mark Gulbrandsen
Resident Trollmaster

Posts: 16273
From: Bountiful, Utah
Registered: Jun 99


 - posted 06-18-2008 10:19 AM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Actually the felt pads will absorb and hold a gob of oil and gunk. Washing them isn't really too good an idea either. Mix water, soap, and oil and you may have a bigger white gunk mess that you may not be able to clean off. The condision of the pads is important too. Felt compresses over time and looses its ability to properly hold lubricant. Having two sets of pads is actually beneficial and would allow you a quick fix even between reels. To clean the pads I soak them overnight in solvent then rinse at least three more times in clean solvent to get the remainder of the gunk out. I use lacquer thinner, benzine, lighter fluid, or some similar but handy solvent that evaporates completely. Kerosene could also be used but the pads may end up smelling like it. What ever you use do this outside. Let the solvent evaporate at least several hours then saturate in clean 40 weight oil. Be sure to clean the other clutch parts as well but don't get any solvent into any ball bearings in the process, also clean the take up belt/chain. If its a chain also re-lube the chain.
Reassemble the clutch and adjust for proper running tension with the take up reel nearly full.

Cheers!

Mark

 |  IP: Logged

Luci Reeve
Film Handler

Posts: 50
From: Telluride, CO, USA
Registered: Feb 2006


 - posted 06-22-2008 07:15 PM      Profile for Luci Reeve   Author's Homepage   Email Luci Reeve   Send New Private Message       Edit/Delete Post 
Thanks Mark.

What would be your preferred solvent? I will take them out and clean them as soon as I get my new ones.

Do you recommend putting anything on them when I install the new dry clean ones?

 |  IP: Logged

Mark Gulbrandsen
Resident Trollmaster

Posts: 16273
From: Bountiful, Utah
Registered: Jun 99


 - posted 06-22-2008 07:45 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Hi Luci,

I reccomend just clean SAE40 weight non detergent oil. Saturate then let them drip. Store the oiled and readied pads in zip lock bags.

Mark

 |  IP: Logged

Luci Reeve
Film Handler

Posts: 50
From: Telluride, CO, USA
Registered: Feb 2006


 - posted 06-27-2008 11:18 PM      Profile for Luci Reeve   Author's Homepage   Email Luci Reeve   Send New Private Message       Edit/Delete Post 
Now I know what to do I'm just waiting on the new clutch pads to arrive.

 |  IP: Logged

Brad Miller
Administrator

Posts: 17695
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 06-27-2008 11:44 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
I am in the camp with Dan. Buy them new and never, ever oil them. Set your tension lower and forget about them. Oiling them just creates another point of maintenance.

 |  IP: Logged

Luci Reeve
Film Handler

Posts: 50
From: Telluride, CO, USA
Registered: Feb 2006


 - posted 07-24-2008 05:09 PM      Profile for Luci Reeve   Author's Homepage   Email Luci Reeve   Send New Private Message       Edit/Delete Post 
OK. Got 2 new clutch pads. I just replaced the kelmar rewind clutch pad because the old one is horribly black so I might as well experiment with this one. I'm going to soak it overnight. I've got mineral spirits, turpentine, acetone and denatured alcohol. Which would be the best?

 |  IP: Logged

Mark Gulbrandsen
Resident Trollmaster

Posts: 16273
From: Bountiful, Utah
Registered: Jun 99


 - posted 07-24-2008 07:24 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Acetone will work the best but only use it outdoors. Its too flamable... and the fumes make you feel like you'e had a dozen [beer]

 |  IP: Logged

Luci Reeve
Film Handler

Posts: 50
From: Telluride, CO, USA
Registered: Feb 2006


 - posted 09-10-2008 12:36 PM      Profile for Luci Reeve   Author's Homepage   Email Luci Reeve   Send New Private Message       Edit/Delete Post 
I decided to oil the pads because I was told the oil collects the crud and keeps on working. And we have plenty of crud flying around our booth what with the popcorn machine being right below our projectors. I just pulled out the two pads from the take up clutches and had to throw them away...even after cleaning they still had shiny bits embedded in them...and they started out dry.

 |  IP: Logged

Brad Miller
Administrator

Posts: 17695
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 09-10-2008 01:08 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
quote: Luci Reeve
I decided to oil the pads because I was told the oil collects the crud and keeps on working.
You were given bad information. The oil attracts and collects the crud and continually requires maintenance. When they are wet you have to have higher tension than when they dry out. If you never wet them, the tension required stays at a constant.

You should come visit me sometime. I can takeup on a 6K split reel with very little tension on the film and pop the sides off to reveal a perfectly wound roll of film. I've never been able to achieve that with wet pads, and my adjustments never drift.

 |  IP: Logged

Mark Gulbrandsen
Resident Trollmaster

Posts: 16273
From: Bountiful, Utah
Registered: Jun 99


 - posted 09-10-2008 06:06 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
I certainly disagree... All felt type clutch pads need the proper type of lubrication so the metal clutch disks don't wear and increase the friction of the clutch assembly. If the friction increases, especially unknowingly not only do you stand to damage film but you will be purchasing more parts to rebuild your feed and taleup clutches... now if these are the old style Century clutches parts are NLA and you'd be SOL. I can't tell you how many Kelmar metal clutch disks I've replaced in 32 years in systems running hour reels that never received proper lubrication

Mark

 |  IP: Logged

Brad Miller
Administrator

Posts: 17695
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 09-11-2008 04:14 AM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
Mark must sure like to crank down that tension. I find it barely takes any to do the job right, and there is just no way light tension on a felt pad will wear down the metal clutch. As such, these problems he claims occurs have never happened to me or anyone I know running them dry...but ok, whatever. I shall stand firm that his operators were running them too damn tight.

 |  IP: Logged



All times are Central (GMT -6:00)  
Post New Topic  Post A Reply Close Topic    Move Topic    Delete Topic    next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:



Powered by Infopop Corporation
UBB.classicTM 6.3.1.2

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.

© 1999-2018 Film-Tech Cinema Systems, LLC. All rights reserved.