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Author Topic: Using an oil additive to prolong life of parts such as duralube or slick 50 Michael Moore Expert Film Handler Posts: 188 From: Dover, DE / USA Registered: Jun 2006 posted 05-26-2007 06:37 PM                        I see in the SH-1000 manual they call for SAE 40. for the super it just says our oil no SAE number. I would figure that in the projection industry oil would be one of the most important things to standardize. I guess not. Mike  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 05-26-2007 06:41 PM                        I have one good story on this: Nick Mulone's father once asked me what oil is correct for his Century. I asked him what he used; he said it was 20 wt non detergent which I think is a bit thick. How long? "Since 1948!" he said. My reply is not to change anything. Besides, the thinner oil would probably leak out by now. Louis  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-26-2007 07:46 PM                     A gearbox type Simplex soundhead as well as RCA soundheads absolutely will last longer and perform better on 40-weight as compared to 30-weight. Steve  |  IP: Logged Aaron Mehocic Jedi Master Film Handler Posts: 804 From: New Castle, PA, USA Registered: Jun 99 posted 05-26-2007 08:55 PM                     quote: Jarryd Beard Around these parts, you might hear someone say they are a lot "slippier." Or tell yinz guys to worsh yer hans cause the ohl will gomp 'em all up. quote: Louis Bornwasser Our source for this is a mil spec Chevron oil for jet engines. John Williamson once told me a story about when he served in Vietnam somebody was selling this oil to the locals as "cooking oil". Apparantly the government found out when military doctors investgated numerous cases of sudden blindness in the villages around the base. Given what was available on the black market during the war in Vietnam, this story doesn't seem all that far fetched.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-26-2007 09:42 PM                     quote: Steve Guttag A gearbox type Simplex soundhead as well as RCA soundheads absolutely will last longer and perform better on 40-weight as compared to 30-weight. Of course 40 weight is better than 30 weight... the heavier viscosity hangs on the gear teeth better. I run Mobil-1 75/90 gear oil in all the Simplex and RCA sound heads that I service... er that I don't have to service any more except for the lateral guide and occasional LED failures. Have been doing this for over 7 years now with not one bronze gear failure on any of those. The actual viscosity of the Mobil-1 is seemingly thinner than its actual equivelent weight. Mark  |  IP: Logged Bill Enos Film God Posts: 2081 From: Richmond, Virginia, USA Registered: Apr 2000 posted 05-26-2007 09:46 PM                     Slick 50 no longer contains teflon. It's now just some sort of high priced oil  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-26-2007 10:13 PM                     Hasn't teflon been classified a carcinogen? Mark  |  IP: Logged Michael Moore Expert Film Handler Posts: 188 From: Dover, DE / USA Registered: Jun 2006 posted 05-26-2007 10:28 PM                        No PTFE is probably the most chemicaly inert substance on earth with the lowest coefficient of friction (less then 0.1) known to man. However the chemical perfluorooctanoic acid better known as PFOA; which is used to make PTFE is a carcinogen. if PTFE is heated to about 500F and you inhale it you can get a chronic respiratory irritation coined “PTFE flu” PTFE is used in implants, artificial valves, joint replacements, and piercing, and that's just the tip! It is biologically inert, however again if decomposed by heat the derivatives are detrimental to the health of humans and animals. Because of the PTFE flu and PFOA DuPont has been in litigation for years, and just to think that stuff was invented by accident in a duPont lab in NJ. Mike  |  IP: Logged Bill Enos Film God Posts: 2081 From: Richmond, Virginia, USA Registered: Apr 2000 posted 05-27-2007 12:47 AM                     The Slick 50 discussion reminded me of a guy I worked with about 10 years ago who used Slick 50 in his vehicle engine. When I left that job he was in the midst of a dispute with the manufacturer of a rebuilt engine that had been installed in his Chevy Suburban. It seems that the engine had experienced a minor overheat due to a broken water hose. The hose was replaced and there seemed to be no other problems. A short distance later the engine suffered a bearing seizure of some sort. All this in the warranty period of the engine. After considerable arguement as to what caused the failure an arbitrater decided to have the engine sent to a lab for disassembly and analysis. Inspection found ptfe or a similar plastic material blocking an oil passage, the report did not get more specific. It said also that there was no evidence of an overheat. But additionally said that there was the possibility the the ptfe was caused to form clumps or whatever due to the heat. Based on that information the arbiter sided with the manufacturer and the claim was denied. Ron said he wasn't happy with the decision but he had to accept it, hasn't use Slick 50 since either.  |  IP: Logged Jon Paul Johns Film Handler Posts: 18 From: Oklahoma city,Oklahoma/United States Registered: Nov 2005 posted 05-27-2007 07:52 AM                     What do you think about Synthetic Automatic Transmission Fluid in a Century, Simplex, or a DP35-70.  |  IP: Logged Michael Moore Expert Film Handler Posts: 188 From: Dover, DE / USA Registered: Jun 2006 posted 05-27-2007 09:20 AM                        The internal combustion engine in the combustion chamber can have a temperature range of about 1500 - 2000 F, however on the lubrication side of the engine the temperature can get as hot as 300F, however if there is a problem with the cooling system then the temp could reach 500F and this could cause PTFE to decompose and I'm not sure what would happen then. If his engine had a cooling issue and it did overheat then that could have been the problem, not the PTFE; the PTFE was affected by the increase in heat ultimately causing the problem, but the cooling system if operating properly would have not caused it to begin with. I can't see the temperature of an intermittent or bearing in a projector to get up to 500F; (anyone know this?) so I don't think temperature would play a role if using PTFE. However after reading this I don't think I'm going to use slick 50 or duralube Slick 50 (engine oil additives) Automatic Transmission Fluid As for ATF, it contains lots of detergents, and antifoaming agents, as well as conditioners. I would not use it. Maybe single weight gear box oil like 80 or 90W like Mark suggested would work better for gear boxes. I would then be concerned with heat transfer at those viscosities. I have a lathe at home that uses SAE 30. The company says anything thicker and under heavy load the gears would overheat. Anything lighter and the gears would not be properly lubed and damage would accrue. Mike  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 05-27-2007 09:43 AM                        At the time I determined what to sell, Chevron had a "lubrication lab" in Louisville complete with more than 5 engineers with degrees in this. I took them a gear box and a cutaway intermittent along with speed data and temperature measurements. I also took several samples of commonly available "projector oil." At the time, Simplex oil was 10% varnish by volume. Louis  |  IP: Logged Robert Minichino Master Film Handler Posts: 350 From: Haskell, NJ, USA Registered: Dec 2005 posted 05-27-2007 11:04 AM                        MMO (per MSDS) is 70-80% naptha and 20-30% mineral spirits. Good for removing varnish and cleaning things out, but it also evaporates pretty easily. Other than temporarily thinning the oil I don't see anything harmful about it. A lot of additives are some mineral oil with ZDDP, which is an excellent anti-wear additive. Manufacturers have been cutting back on due to cat fouling, so you might want to add it if you're using motor oil; gear oil still should have good quantities of anti-wear additives. MoS2 (molybdenum disulfide) is another excellent anti-wear additive. Anti-foaming additives are extremely important in gear oil to prevent air entrainment (resulting in poorly-lubricating milky-colored oil). Additives that contain too much oil without anti-foaming additives (*cough*Lucas*cough*) can hurt the gear oil's performance. IANAT (I am not a tribologist)  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 05-27-2007 12:44 PM                     I have a XL that would blacken the oil a week after a changeout, thus, I drained the dirty out then put ATF in the gearing and let it run for a couple of months..with frequent changes to flush out the dirty and bring in the clean. Amazing that the machine ran tons quieter, a lot less friction involved and got rid of my "oil dirtying" problem... I have a good 45 second coastdown from when the power is cut from the motor.. As Louis mentioned about the varnish: Using that ATF got rid of the years of using Simplex oil that left varnish residue in passages, sleevings, and bearing races. We're now using an "oil" that is basically is hydraulic oil - thinner and more clearer than the stock Simplex oil from STRONG ...  |  IP: Logged Alan Gouger Jedi Master Film Handler Posts: 501 From: Bradenton, FL, USA Registered: Jul 2000 posted 05-27-2007 02:00 PM                        How often should you change the oil in an intermittent and would it hurt changing it more frequently ensuring the oil is always fresh and clean.  |  IP: Logged

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