The connecting rods link pistons with the crankshaft and transmit to it the loads arising from the combustion gas pressure taken by the pistons. In operation, the connecting rod is subjected to both gas pressure and inertia loads, and therefore, it must be adequately strong and rigid and light in weight as well. Connecting rods are generally fabricated from a high-quality steel in the form of a bar with ring shaped heads at its ends.the head are being known as the connecting rod big end and small end, and serving to attach the rod to the crankpin(曲柄销) and the gudgeon pin(活塞销) of the piston respectively泽邦科技 The connecting rods link pistons with the crankshaft and transmit to it the loads arising from the combustion gas pressure taken by the pistons. In operation, the connecting rod is subjected to both gas pressure and inertia loads, and therefore, it must be adequately strong and rigid and light in weight as well. Connecting rods are generally fabricated from a high-quality steel in the form of a bar with ring shaped heads at its ends. the head are being known as the connecting rod big end and small end, and serving to attach the rod to the crankpin (曲柄销)and the gudgeon pin (活塞销)of the piston respectively