Comprehensive maintenance manual for the 520, 525 and 530 series 3-phase thyristor converters.

Includes:

Bridgeport Interact 520 Vertical Machining Centre as fitted with with Heidenhain TNC 155 controller. Maintenance Manual with Wiring Diagrams.

Jones and Shipman 520 Miniature Precision Cylindrical Grinder. There never was a manual for this model - but instead a well-produced 8-page booklet plus an extra sales sheet showing the extent of the machine's capabilities.