If all else fails, buy a copy of "How to Run a Lathe" (South Bend) for general principles, and pair it with a generic "Engine Lathe Maintenance Manual" from Industrial Press. You will miss specific gear ratios, but you can calculate threads manually using the gearbox tag.
: While they primarily list new equipment like the 1640S / 1660S Lathe , they sometimes provide Digital Control Lathe (DCL) brochures and specifications. Ozark Tool Manuals : A highly recommended source for Victor 1630-1640-1660 Owners & Parts Manuals victor 1640 lathe manual pdf
These manuals are 95% the same. The thread chart and gearbox part numbers will match, though the electrical brand may differ. If all else fails, buy a copy of
Victor 1640 lathe manual is typically a 50-to-82-page document covering operation, maintenance, and a complete illustrated parts list for models including the 1640S and 1640B. Key Features Outlined in the Manual Heavy-Duty Construction : Features a rigid, one-piece Meehanite casting bed Ozark Tool Manuals : A highly recommended source