Electrolimit Supermicrometer Model B Instruction Book

Instruction book for the Pratt & Whitney Electrolimit Supermicrometer Model B, a precision measuring instrument from Colt Industries' Cutting Tool & Gage Division. This comprehensive service manual covers operating procedures and maintenance for this optical comparator and direct-reading micrometer system. Detailed sections describe the instrument and full specifications, component identification for the headstock, tailstock, bed structure, calibrated measuring scale, and standard accessories. Installation and initial gage setup procedures are included, along with step-by-step operation in direct-reading supermicrometer mode and in comparator mode for precision parts inspection. The manual provides technical guidance on lapping and maintaining the anvils, removal and servicing of the headstock spindle assembly, and complete electrolimit circuit operation and troubleshooting. An essential reference for toolroom technicians, precision manufacturers, and anyone responsible for operating or maintaining this specialized measuring equipment. Document G2100-1, published by Pratt & Whitney Cutting Tool & Gage Division, West Hartford, Connecticut.