Why? these machines are high quality all metal machines made with precision mechanisms and tight tolerances. The machines manufactured in Singer’s Andersonville plant are very well built and considered by some to be the end of the line for Singer’s heirloom quality machines. They also feature an internal motor, a high shank presser foot, a quick-change needle plate, left-center-right needle position, and except for the 301A (which is a straight stitch machine), they have an internal cam mechanism that produce different stitch patterns by inserting a varied selection of plastic pattern discs. They also incorporated an all gear driven rotary hook, class 66 drop in bobbins, and they use standard 15×1 sewing needles that thread front to back. These slant needle machines included a plethora of enhancements in addition to the unique slant needle design. Production of machines in Andersonville lasted thru 1962. Later, using a new body style and the same sewing mechanism, they produced the model 500 and 503A sewing machines affectionately known today as “Rocketeers”. This plant produced the model 301A, 401A, and 403A sewing machines.
In 1951 Singer built a new manufacturing plant in Anderson South Carolina dedicated to the production of its new slant needle machines. In a major departure from Singer’s straight needle design the Singer 403A has a slant needle design, in 1951 Singer hung its hat and its future on the redesign of its domestic sewing machines from a vertical needle design to a slant needle design where the needle bar was slanted at an angle of 9 degrees. Getting it to sew wonderfully was assured. She contacted me to find and correct the problem, and also knowing that is not the case, I assured her that her 403A was a durable, and high-quality machine capable of any sewing project she could imagine. She had previous experience with the model 403A and knew this was simply not true. When the machine was returned, the problem persisted and when she questioned why, she was told that “you can’t go through more than 2 layers with older machines”. The reasoning was that the original foot controller was a “fire hazard”. She took the machine into a service repair shop where they oiled the machine and replaced the original foot controller with an electronic controller. The customer purchased the machine as “refurbished” but had difficulty with the machine breaking the top thread when sewing thru multiple layers of fabric.
This restoration is for a Singer model 403A sewing machine.
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