Class 401
The Singer Class 400 Sewing Machines feature a slant shank and rotary hook. They use Class 66 Bobbins and 15x1 needles. They thread from the front to the back.
Singer 400 Series Model Descriptions
The Singer 400 series represents Singer's innovative mid-century design approach, featuring the
revolutionary Slant-O-Matic needle system. This comprehensive guide details the specifications and unique
features of models 401, 403, 404, 411, and 431, highlighting their mechanical differences and specialized
capabilities.
Flip-up Lid of the 401, showing the different built-in stitches. Insert Singer Special Discs for even more stitches.
The reverse lever, bobbin winder, Singer emblem and model number plaque for this 401.
Stitch selector for the different stitches the 401 produces.