Conveyor Pulley Bearing Grease Calculator

G = 0.005 × D × B grams. The defaults model a 22216 spherical roller in a head-pulley plummer block (OD 140 mm, width 33 mm → 23.1 g) — measure or look up your bearing's OD and width and the tool recomputes instantly. This is the replenishment charge, not the initial fill (which is 30–50% of the free space for most speeds).

For remote, hard-to-reach or safety-fenced bearings, usually yes: a gas or electromechanical lubricator dosing the calculated quantity continuously beats a technician's quarterly visit it replaced — bearings see steady fresh grease and constant purge pressure against dust. Size the cartridge dispensing rate from this calculator's grams over your interval. Keep humans in the loop annually: lubricators fail full and fail empty, so a quick temperature/visual check per round catches both.

The rolling elements churn through excess grease, temperature climbs sharply (often 10–30 °C), the thickener shears down and bleeds oil, and pressure can lip the seals open — after which contaminants walk in. Electric motors suffer the extra failure mode of grease forced into the windings. If you see grease purging from seals and a temperature spike after lubing, you found the cause.

Interval depends on speed factor (n·dm), temperature, load and orientation — use the OEM's table or SKF's relubrication chart as your starting point, then halve it for every 15 °C the bearing runs above 70 °C, for vertical shafts, or for wet/dusty service. Enter that interval here and pair this tool with a bearing-temperature trend to validate it.