Engineered Lubricants, Coatings and Lapping Compounds for Industry

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FAQ:

Dry Film Lubricants:

Q: What is the difference between WS2 per Process SL-39, MoS2 and MoS2 per MIL-PRF-46010/AS5272?
A: WS2 per Process SL-39 and our MoS2 coating are applied at room temperature with no resins or binders and no curing required, while MoS2 per MoS2 per MIL-PRF-46010/AS5272 utilizes resins and binders and requires heat curing. They are different thicknesses and offer varying degrees of corrosion protection. Please see the technical data on our website or contact us for more information.
 
Q: How do I decide which coating is best for my application?
A: This is best left for a qualified design or lubrication engineer and depends on the application of the component. We can offer advice based on past experience and provide prototype service to allow testing of your components in their actual application.

Q: When should I consider dry film lubricants?
A: In any application where long term lubrication, extended service life of lubricated components or the prevention of fretting and/or galling is desirable.
 
Q: Are dry film lubricants vacuum compatible?
A: WS2 and MoS2 applied with no resins and binders are the best for applications operating in vacuum and have been proven over time by many industries.

Q: Will the dry film lubricants affect precision tolerances?
A: In most cases no. WS2 per Process SL-39 has a maximum build up of 0.5 microns and will not affect dimensional tolerances within typical machining limits.
 
Q: What type of material (substrate) can I apply dry film lubricant to?
A: Dry film lubricants can be applied to any ferrous or non ferrous metallic substrate. In some cases it can be effective on manmade plastics, ceramic etc.

Q: What is the service life of dry film lubricants?
A: This varies widely depending on the application. Factors such as load, temperature , operating environment, co-lubricants, etc. can greatly increase or decrease the service life of the dry film lubricant. We typically see a component life of 2-5 times greater than a non dry film lubricated component.
 
Q: Will the dry film lubricant change the color of my part?
A: Yes. WS2 per Process SL-39 and MoS2 will leave a bluish gray finish which mirrors the original finish. MoS2 per MIL-PRF-46010/AS5272 will leave a flat black matte finish.
 

Timesaver Lapping Compounds :

Q: What is the difference between the Green and Yellow Labels?
A: Our Green label grades are designed for hard metals such as Steel, Cast Iron, Hard Bronze and Stainless Steel. Our Yellow label grades are designed for soft metals such as Babbitt, Brass Bronze and Aluminum.
 
Q: How long will it take to lap my part?
A: This can vary greatly. Factors include the amount of material that needs to be removed, contact pressure between lapped parts, which grade you are using etc. Experimenting with various grades and mixture ratios will determine the best grade for your application. Our test kits are a great way to evaluate which grade is best for your application.
 
Q: How much lapping compound do I need?
A: It will depend on your application. Timesaver comes in a powder and is mixed with oil as used, typically 4 parts oil to 1 part timesaver. A 3 oz jar should be enough to lap the main bearings on a model T, while a 50 lb. pail may be required to lap a large bull gear in the mining industry.
 
Q: Can I lap my parts without disassembling them?
A: Yes. Because Timesaver Lapping Compounds do not imbed and do not continue to cut, you can lap your components in place. Care must be taken to protect bearings or other components that are in your system that you do not want abrasives introduced to.
 
Q: Can I mix Timesaver with water instead of oil?
A: No. Timesaver Lapping Compounds are designed to be mixed with oil or grease only.
 
Q: Do I need to flush out the lapping compound with solvent?
A: It is recommended. However, simply flushing with fresh oil has proven effective. In any case, Timesaver Lapping Compounds will not continue to cut but you need to make sure that any metal that was removed is flushed out of the gear, bearing, bushing, etc.

Q: Do I need to clean my parts before changing grades, i.e. changing from 55N Coarse to 111N Fine?
A: No. Because Timesaver Lapping Compounds are fast cutting then breakdown to an inert material, there is no need to clean your parts prior to changing grades.
 

Don’t see an answer to your question? Please give us a call or send your question via e-mail and we will do our best to get you an answer! (408)723-0700 / info@ws2coating.com

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