Greasing Bearings correctly: The Math and the Logic! Getting the right amount of grease in your bearings is critical for longevity. Too much, and you’ll cause churning and heat; too little, and you’ll face friction. We often rely on a general 30% fill rule, but do you know the precise formula? Here’s the standard engineering calculation for initial grease fill (G): G = 0.005 × D (Outer Diameter in mm) × B (Width in mm) This formula, which has been corrected in our diagram for clarity, gives you a precise initial grease quantity in grams (or cm³). Check out our detailed breakdown with examples for a standard 6206 bearing and a larger 6310, plus a breakdown of the variables. We also have a great visualization of what that 30% volume looks like in a cutaway bearing. Save this for your next maintenance session and get the calculations right! Post navigation Comprehensive Compound Gear Train Velocity Analysis Bearing Life Calculation – Engineering Made Simple!
