GPM from Measurements Pump/Motor Type: Gear Vane Gear Width (W): Gear Bore Dia. (D): Bore to Bore (L): RPM: GPM @  RPM   =    _________

Formula for Gear Pumps: GPM @ 1800 = 47*W*(2*D-L)*(L-D)/2 Formula for Vane Pumps: GPM @ 1800 = 94*W*(L+D)/4*(L-D)/2