Cross Bearings

A cross bearing is a bearing, usually a crankshaft main bearing of a piston engine. Most bearing caps are retained by two bolts, one on each side of the bearing journal, and parallel to the cylinder axis. A cross bearing has one or more additional bolts, at right-angles to both the cylinder and crankshaft axes. These bolts may be either a single through bolt passing through the crankcase from one side to the other, or else two blind bolts threaded into the bearing cap from each side.