Calculation for Amount of Grease for a Bearing February 24, 2014 All units are in grams and centimeters. Bearing OD = A Bearing ID = B Bearing HT = H Volume of bearing (solid) = Vbearing Mass of bearing (solid) = Mbearing Mass of bearing (measured) = mbearing Volume of ’free space’ = Vf ree % of ’free’ for grease = %G Volume of grease = Vgrease Mass of grease = Mgrease Density of steel (ρS ) = 8 grams/cm3 Density of grease (ρG ) = 0.9 grams/cm3 VA = πH · A2 /4 VB = πH · B 2 /4 = VA − VB Vbearing Mbearing Vf ree Vf ree Vgrease Mgrease Vgrease Mgrease = ρS · Vbearing = (Mbearing − mbearing )/ρS mbearing = Vbearing − ρS = %G · Vf ree /100 = ρG · Vgrease [ mbearing ] = %G · 0.7854 · H(A2 − B 2 ) − 8 [ mbearing ] 2 2 = 0.9 · %G · 0.7854 · H(A − B ) − 8 1