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Singer® Single Needle Lockstitch, Straight and Zig-zag Sewing Machines — Model 20U
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General Applications
  • Single needle lockstitch zig-zag machine for a wide range of materials from light to medium heavy fabrics. Embroidery can also be accomplished on these varieties.
General Specifications
  • Zig-zag stitch width 9mm - 12mm. Straight stitching at speeds up to 2,500 s.p.m. can be achieved by means of a needle bar frame locking device.
  • Bed dimensions:
Model 20U Bed Dimensions
  • Machine pulley size: 2.9" (74mm)
  • Motor required: Singer clutch motor low speed 1/3 H.P. or 1/4 H.P.
  • Needle Cat. No. 1910-05
  • Independently adjustable and variable forward and reverse feed system facilitates ease of backstitching.
  • Stitch width can be adjusted freely by using a knee operated bight control. Stitch width can also be fixed.
  • Hook advancing and retarding mechanism which allows zig-zag sewing at wide bights (max. bight 12mm).
  • Easily convertible to embroidery or zig-zag or straight stitching.
  • Provided with a needle position control device which makes it possible to produce buttonholes.
  • Built-in bobbin winder.

Maximum Sewing Speed

By restricting the width of zig-zag stitching to no more than required for work, it is possible to use the machine at the highest possible speed. This chart shows maximum speeds related to zig-zag bight.

Model 20U Sewing Speeds

Note: The maximum speeds are also dependent on materials and type of operation.

Regular fittings supplied with 20U machines

20U Fittings

Attachments supplied with 20U73/83
Hemmer foot 1/8" (3.2mm) P/N 606694
Zipper foot P/N 606691
Presser foot for making free-hand buttonholes P/N 606692

Specification Chart

Spec Chart

Feed Icon Drop feed and reverse feed.
The reverse lever is spring loaded
Hook Icon Sewing hook has advancing and retarding mechanism to keep needle and hook in correct relationship even at widest bight.

Optional extra attachments

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