Apparatus for spin-welding comprises a spin welding machine having a spin welding head (16), a ram assembly (15), and a feed mechanism (12); the ram assembly is driven from a shaft (8) and the feed mechanism comprises a rotating turret mounted on a shaft (13) which is driven from the shaft (8) via a Geneva mechanism (14). The spin welding head (16) is driven by a low inertia DC servo motor (17) operated by a programmable logic controller and timed from a switch unit (18) driven off the shaft (8).
