Abstract: An inside broaching machine having an upper pressure cylinder and a lower drawing cylinder that can be displaced in a machine rack. A machine table with receiving means, receives work pieces in parallel, and the broaching tools extending through the machine table each can be locked on the pressure carriage and the drawing carriage in tool holders. The machine exerts pressure and tensile force in the course of the broaching operation. The broaching tools are held clamped on the pressure carriage and the drawing carriage in radially clamping tool holders through the broaching operation. The two carriages are coupled in a force-locked manner.

Abstract: A broaching machine and method for machining main bearings and crankpin bearings on a crankshaft for an automotive engine wherein a plurality of removable cutting tool inserts are arranged on a horizontally reciprocating slide below a rotating crankshaft to machine a plurality of bearings and distribute machining forces over the machining operation during a single pass of the slide. The slide also serves as a transfer device for loading and unloading crankshafts into the machine. An air bearing can be developed between the slide and the tooling to assist the operator in removing the tooling from the slide.

Abstract: The invention relates to a multiple-broach broaching machine for broaching a pattern of holes formed in a workpiece. This machine comprises means for moving and positioning the workpieces on the broaching machine, means for pulling the broaches and means for following the broaches, said pull means and follower means co-acting with the opposite ends of the broaches, respectively, to ensure their passage through the holes of the workpieces to be broached from one side to the other side of the workpieces, said pull means and follower means being provided for two similar sets of broaches adapted to operate simultaneously in opposite directions. A handling device is associated with said sets of broaches on either side of the plane in which the workpieces are positioned, for the purpose of transferring each set of broaches, by turning same through 180.degree., from said pull means to the adjacent follower means at the end of each pass.