3-27. Repair- Sewing Procedures - continued.
Table 3-2. Sewing Machine Code Symbols
SEWING MACHINE, INDUSTRIAL: General sewing; 301 stitch; light duty;
SEWING MACHINE, INDUSTRIAL: Zig-zag; 308 stitch; medium duty;
SEWING MACHINE, INDUSTRIAL: Zig-zag; 308 stitch; light duty;
SEWING MACHINE, INDUSTRIAL: General sewing; 301 stitch; heavy duty;
SEWING MACHINE, INDUSTRIAL: General sewing; 301 stitch; medium duty;
SEWING MACHINE, INDUSTRIAL: Darning; lock stitch;
SEWING MACHINE, INDUSTRIAL: 301 stitch; light heavy duty;
SEWING MACHINE, INDUSTRIAL: 301 stitch; double needle;
Darning. Refer to table 3-2. Darning is a sewing procedure used to repair limited size holes, rips, and tears in
items constructed from textile material. A darning repair may be made either by hand or sewing machine, depending
upon the method preferred and the availability of equipment. However, a darning machine should be used to darn small
holes and tears where fabric is missing. Darning of previously patched material can be performed provided darning size
limitations prescribed in the paragraph applicable to the item are not exceeded. A darning repair will be performed using
the following procedures, as appropriate:
Using an authorized marking aid of contrasting color, mark a square around the damaged area and
ensure that the marking is at least 1/4 in. back from each edge of the damaged area. The marking will
be made with the warp and the filling of the material.
Dam the damaged area by sewing the material in a back-and-forth manner, using size A or E nylon
thread, allowing the stitching to run with the warp or filling of the fabric (A, fig. 3-16).
Turn the material and stitch back and forth across the stitching made in (b) above until the hole or tear is
completely darned (B).