Abstract: A relatively small and lightweight portable plastic welding machine is suitable for use on a table top. The welding machine has stationary and traveling modes for welding one or more sheets of flexible plastic material. A single motor is provided for driving rotation of pinch rollers adjacent a welding tip and rotation of a drive wheel to cause travel of the machine. A clutch provides the ability to easily switch between the stationary and traveling modes.

Abstract: A device (1) for machining by turning rotationally symmetrical surfaces (18, 20 or 22) of a workpiece (10), which is clamped and has a rotating drive, including a tool (12) having two cutting edges (16) and (17), each having an approximately helical shape, which are disposed one behind the other in the feed direction of the tool (12) such that after the machining by turning with the first cutting edge (16), a roughing edge, the second cutting edge (17), a finishing edge, comes into engagement.

Abstract: A cutting blade includes a connection portion for connection to a cutting head for rotating the blade, preferably in association with other blades being rotated with the cutting head. The blade body also includes a blade body portion with a leading edge with a cutting blade portion and an upper leading surface and lower leading surface extending from the leading edge to an upper transition zone and lower transition zone respectively. A upper trailing surface extends from the upper transition zone to a trailing edge and a lower trailing surface extends from the lower transition zone to the trailing edge. The upper and lower trailing surfaces converge such that the blade body portion is hydrodynamically shaped. According to a further embodiment, the cutting blade has a sickle shape.

Abstract: A tube saw for precision cuts on tubing wherein a motorized circular saw is rotated about the circumference of a tube to cut it without leaving burrs, finishing marks or other deformations on the tubing. The tubing is held firmly and precisely by a plurality of facing triangular clamping elements and the clamping elements are centered and firmly locked in place relative the housing containing the saw to ensure the blade does not move relative the tube during the cut. The housing, rotatably holding the saw, has bearings with angular and radial stiffness to hold the saw firmly in position during the cut to ensure a high quality cut. A servomotor drives the rotatable portion of the housing at an even rate to cut the tubing with an even force and rate around its circumference. The saw is positioned close to the end of the clamping elements to limit bending and vibrations in the tubing from interfering with a square high precision cut.

Abstract: A rotating log saw clamp having a clamp infeed section and a clamp outfeed section located adjacent a log saw blade. The clamp infeed section and clamp outfeed section are coupled for rotation together with the log during sawing of at least a portion of the log by the log saw blade.