Lithium-soap and silica-based electrically conductive greases, including low-carbon greases for superior channeling ability…
If static discharge poses a hazard to your application, consider a conductive lubricant by Nye.
Conductive grease typically serves as a ground/bonding. For example, it is applied to ball bearings in computer equipment where it allows static discharge to pass through the bearing instead of building up, arcing, and pitting the rolling element or fluting the raceway – accelerating wear. It serves a similar purpose in treadmills, where the rubber belt can generate static electricity which makes its way to the bearing. A conductive grease is also used to bleed static away from the toner cartridge toward the shell in laser printers and office copiers. A custom-formulated, fluorinated conductive grease was recently developed by Nye for automotive battery lugs, to enhance conductivity over a wide temperature range. Nye conductive greases are now increasingly used by electric vehicle manufacturers to ensure that there is no resistance across battery terminal banks.
Please note that we advise never use conductive grease on electrical connectors or sliding switches, which could malfunction if a conductive grease is applied to the contacts.
The most commonly used conductive grease products from Nye Lubricants…
A stiff, carbon thickened, light viscosity, polyolester grease intended for wide temperature applications where a degree of electrical conductivity in the grease is required. Does have compatibility issues with some plastics, e.g. polycarbonate.
A silica thickened, light viscosity, synthetic hydrocarbon grease intended for electrically conductive, instrument and bearing applications. Nyogel 756G is the most cost effective of the three products plus is compatible with most plastics (compatibility test always recommended).
A stiff, lithium soap thickened, light viscosity, channeling synthetic ester grease intended for demanding bearing/ATEX applications. Widely used in industry to enable static discharge from rotating machinery, Nyogel 758G is also used to as preventative maintenance measure during the construction and servicing of underground/electric rail carriages; the grease is used in between mechanical earth/bonding connections to ensure the path to earth remains secure. Nyogel 758G has a superb pedigree and is the most widely used of the three conductive greases mentioned but also has the highest price point.
Indications of volume resistivity follow but these are only snapshot figures. Volume resistivity of the different batches of grease produced will vary and also it should be noted that volume resistivity of a grease will change over time in the application/real world environment. Volume resistivity of both Nyogel 753G and Nyogel 756G is approximately 30 ohm-cm. Volume resistivity of Nyogel 758G is approximately 300 ohm-cm. Nyogel 753G and Nyogel 756G are gels not pastes. They rely on a proprietary carbon filler, rather than traditional metallic particles, for their conductivity. Nyogel 758G is an excellent channeling bearing grease. It relies primarily on a synergistic effect among its additives, not carbon or metallic filler, to create an electron pathway through the grease.
The products mentioned above are the more popular from the range. If you do not find a product that fits your needs then please contact us as we have many more formulations on file for a large variety of application types.
A conductive grease has many potential applications. We chose a bearing application to demonstrate the effectiveness of the three core products in this test video:
Take a look at the images associated with the video above at our tech support site (opens in new tab/window).