Pallet racking system is used in a large transportation vehicle like a railcar or truck trailer. It consists of a plurality of center posts, which define two drive-through passageways along the length of the vehicle. Pallet-supporting rails are mounted on each side of the posts. One rail is mounted to the posts and another one is mounted on the sidewall opposite the posts. The rails are spaced apart so that a forklift can drive in between them.

Pallet Receivers are made of high-grade cast iron. A pallet receiver for a machine tool is disclosed utilizing a pin and socket for registration and alignment. A pallet clamp piston is employed to clamp the pallet to the receiver base for subsequent machining operations. A registration pin is rigidly secured to the receiver base and a cooperating pin socket is mounted to the pallet under face by means of a compliant diaphragm spring so that as the socket and pin are engaged during the first portion of clamp piston movement the pallet will be registered and aligned with respect to the receiver base.