Abstract: A linear motor (30), including a mover and a stator, the mover having a cylindrical body (33) that forms an elongate circular bore (31) and the stator being an elongate shaft disposed within the bore. The cylindrical body (33) includes a plurality of electrical windings (32) and the shaft includes a synchronous or variable reluctance topology, or a plurality of magnets. Electrical energising of the windings (32) results in relative movement and/or force generation between the cylindrical body (33) and the shaft. The cylindrical body (33) being disposed within a housing (37) with a coolant space (35) being formed between the cylindrical body (33) and an internally facing cylindrical surface (38) of the housing (37). The coolant space (35) being formed along at least a major portion of the length of the cylindrical body (33) and the coolant space (3) being substantially cylindrical and of substantially constant cross-section.

Abstract: A collet adaptor 20 including a work piece clamp mechanism 29. The collet adaptor 20 is rotatable about a first axis A and the work piece clamp mechanism 29 is mounted within the collet adaptor 20 for rotation with the collect adaptor 20. The clamp mechanism 29 is also mounted for movement laterally to the first axis A during rotation of the collet adaptor 29. The clamp mechanism 29 can also be mounted within the collect adaptor 20 for rotational movement lateral to the first axis A during rotation of the collect adaptor 20.

Abstract: A collet adaptor (10) including a body (11, 12) having forward and rear ends and an axial bore (17) extending through the forward and rear ends. A drawbar (13) disposed at least partly within the bore (17) for connection to a collet (14). The drawbar (13) is secured within the bore (17) and a biasing arrangement (42) acts on the drawbar (13) in a direction tending to shift the drawbar (13) rearwardly within the bore (17). The drawbar (13) is displaceable within the bore (17) against the biasing influence of the biasing arrangement (42) to shift forwardly within the bore (17).

Abstract: A collet adaptor 20 including a work piece clamp mechanism 29. The collet adaptor 20 is rotatable about a first axis A and the work piece clamp mechanism 29 is mounted within the collet adaptor 20 for rotation with the collect adaptor 20. The clamp mechanism 29 is also mounted for movement laterally to the first axis A during rotation of the collet adaptor 29. The clamp mechanism 29 can also be mounted within the collect adaptor 20 for rotational movement lateral to the first axis A during rotation of the collect adaptor 20.

Abstract: A collet adaptor (10) including a body (11, 12) having forward and rear ends and an axial bore (17) extending through the forward and rear ends. A drawbar (13) disposed at least partly within the bore (17) for connection to a collet (14). The drawbar (13) is secured within the bore (17) and a biasing arrangement (42) acts on the drawbar (13) in a direction tending to shift the drawbar (13) rearwardly within the bore (17). The drawbar (13) is displaceable within the bore (17) against the biasing influence of the biasing arrangement (42) to shift forwardly within the bore (17).