JONES and LAMSON Automatic Thread Grinding Machine 6" x 36" and 12" x 34" Models. Detailed Operator's Instruction Manual (plus brief maintenance notes) with many useful Sectional Drawings.   
 

Jones and Lamson TG-6 x 36 and TG-12 x 45 Automatic Thread Grinding Machine (6" x 36" and 12" x 45") Models. Detailed Operator's Instruction and Maintenance Manual with Detailed Sectional Drawings and comprehensive photographic coverage of the various electrical control panels - but no electrical schematics.