* Rated load : R = ton * Hook(attachment) weight : A = ton * Wire drum & wire rope weight : Dw = ton * No. of wire rope fall : N = fall * Wire rope reeving efficiency : Er = * Wire drum india. : d1 = cm * Wire drum outdia. : d2 = cm * Wire drum thickness(shell) : H = cm * Wire drum groove pitch : Pi = cm * Wire drum overall length : DL = cm * Wire drum groove length(bearing side) : DL1 = cm * Wi..