Overview of the conductive grease range

Conductive grease typically serves as a path to earth or ground in a customer component or device. For example, any rotating component supported by ball bearings is essentially isolated from the rest of the device by the lubricant in the bearing raceway; a conductive bearing grease is the solution to avoid the build up of static electricity. Conductive grease also has other uses, for example a rail transportation carriage manufacturer relies on our conductive grease to ensure there is a path to earth throughout their rolling stock body to chassis mechanical connections.

If static discharge poses a hazard in your application or device, consider a high performance conductive grease by Nye Lubricants.

The three most popular formula from the conductive grease range – Like all things lubrication, there isn’t a ‘one size fits all’ conductive grease that can be used for every application. Identifying which product is most suitable can be simplistic but we always endeavour to make sure customers are aware of chemistry limitations; that said, the three formulations below usually cover about 80% of the conductive grease requirements from customers. If neither of the products below is suitable, just get in contact for some advice. You may also want to read our short Electrically Conductive Grease introduction article.

Conductive bearing grease applications are by far the most common requests from customers so here are a few guidelines to help you select the best electrically conductive grease for you bearing:

  • Ester base oils are best for metal on metal, demanding applications.
  • Choosing a grease with a base oil viscosity of between 4 and 20 cSt at the typical bearing operating temperature is a good rule of thumb.
  • Don’t confuse base oil viscosity with finished grease stiffness.
  • A higher viscosity base oil viscosity is better for lower speed bearings and obviously a lower base oil viscosity for higher speeds (less drag).
  • None of our synthetic grease formulations use metal particles to achieve conductivity.
  • Sometimes with conductive bearing applications, a slightly higher percentage grease fill is often required.

Nyogel 753G

Technical Data Sheet(TDS) for Nyogel 753G – click on image to open TDS in new tab.
  • Recommend temperature range of -40 to 150°C
  • Ester base oil makes this product excellent for metal on metal wear applications.
  • Kinematic viscosity of 57 cSt at 40°C and 9 cSt at 100°C.
  • Ester base oil can’t cope with high moisture levels.
  • The thickener is a proprietary carbon filler – to achieve conductivity.
  • Ester oil based greases can have compatibility issues with some plastics, if this is an issue consider the Nyogel 756G (PAO base oil).
  • Volume resistivity is approximately 30 ohm-cm.
  • NLGI grade 3

 

Nyogel 756G

Technical Data Sheet(TDS) for Nyogel 756G – click on image to open TDS in new tab.
  • Recommended temperature range of -40 to 125°C
  • Polyalphaolefin (PAO) base oil makes this conductive grease a great ‘all rounder’.
  • Silica thickened but a proprietary carbon filler is also added to achieve conductivity.
  • Kinematic viscosity of 60.7 cSt at 40°C and 9.5 cSt at 100°C.
  • Rust inhibitor and antioxidant additives included in the formula.
  • Good levels of compatibility with plastics.
  • Volume resistivity is approximately 80 ohm-cm
  • NLGI grade 2.

 

Nyogel 758G

Technical Data Sheet(TDS) for Nyogel 758G – click on image to open TDS in new tab.
  • Recommended temperature range of -40 to 150°C
  • Blend of ester base oils used for excellent metal wear resistance in demanding bearing applications.
  • Conductivity achieved by a synergistic effect among its additives to create an electron pathway through the grease; doesn’t use carbon like the 753G and 756G products.
  • Kinematic viscosity of 36 cSt at 40°C and 6.6 cSt at 100°C.
  • Anti-wear and antioxidant additives included in the formula.
  • Ester base oils can’t cope with high moisture levels.
  • Ester oil based greases can have compatibility issues with some plastics, if this is an issue consider the Nyogel 756G (PAO base oil).
  • A superb pedigree in ATEX environment bearing applications.
  • Volume resistivity is approximately 300 ohm-cm
  • NGLI grade 3.

Looking for higher temperature range capabilities? – Ester and PAO base oils have upper temperature limits of about 150C and 125C respectively. Need a conductive grease with a higher temperature capability, no problem! As mentioned earlier in this article, the three products mentioned on this article generally are the most popular but we do have conductive greases that deal with higher temperatures. Our conductive grease called Uniflor 8476 can cope with temperatures up to 225C as it uses a Perfluoropolyether (PFPE) base oil. PFPE’s are great at dealing with high loads and PFPE as at the top end of the price range so if you need a high temperature conductive grease, please get in contact and we’ll be happy to assist.

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