When choosing between oils or greases, it’s important to remember frictional torque levels for a greased bearing are briefly higher to start with, as the bearing begins to spin from stationary. This is because thicker grease takes a short time to ‘run in’ and get distributed inside the bearing. It’s most likely not a problem for many continuous applications, but this could cause problems for stop start equipment.

For many applications, grease is more convenient as it stays inside the bearing for longer. It benefits from both the properties of the base oil and the added thickener; both having positive effects on the performance of the bearing and its lifespan.

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1) Partial load 32…165 W / 150 W max. for output currents < 680 mA / Not dimmed 2) 90…242 V for output current > 680 mA 3) Permitted voltage range 4) Within nominal output current range 5) Max. output power at 230 VAC 6) Minimum/Full load at 230 V/Half load at 230 V 7) At full load and 230 V 8) Maximum 9) Type B 10) Single pulse 10kV / 12 Ohm (1.2/50 μs) 11) @ 2 Ohm, acc. to EN61547

Both oils and greases have their advantages and we’ll forgive you for using the terms interchangeably.  Technically though, grease is defined as an oil mixed with a thickener. Because of this, oils tend to provide higher running speeds, but will not stay in place as effectively. Therefore, continuous re-application may be needed whether the bearing is sealed or not.

Your best bet is to try our ‘choose your lubrication’ quiz, and if you still have any queries, call us on +44 (0) 1993 842 555.

Our determination to remain specialised gives us a high level of product knowledge, providing bearing and lubrication solutions to existing or potential customers, whether individuals or large corporations. We don’t just sell bearings, we help to solve your problems. - Chris Johnson, managing director of SMB Bearings.

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