TM 10-8340-205-13&PSECTION II. DIRECT SUPPORT MAINTENANCE PROCEDURES5.2 GENERALDirect support maintenance provides more extensive tentage repair than is authorized at the unit maintenancelevel. Repairs of tent fabric greater than 4-inches in length or diameter and major repairs to other tentcomponents are done at this level of maintenance. Repair is usually accomplished by industrial machinesewing and stitching of large patches over damaged areas or cloth panel replacement on the tent. Table 5-1lists the most commonly used sewing machines.Table 5-1. Industrial Sewing MachinesSEWING MACHINE TYPEDESCRIPTIONSEWING MACHINE, INDUSTRIALGeneral sewing; power driven; lock stitch; single needle; flat bed;(Heavy duty)w/rigid table stand; 7-33 or any equivalent modelSEWING MACHINE, INDUSTRIALGeneral sewing; power driven; lock stitch; single needle; flat bed;(Medium duty)w/rigid table stand; 111W155 or any equivalent model.SEWING MACHINE, INDUSTRIALDarning; power driven; lock stitch; single needle; 6 7/8-inches depth(Darning, light to medium)of throat; cylinder bed; w/rigid table stand; 47W70 or any equivalentmodel.SEWING MACHINE, INDUSTRIALHeavy leather or webbing sewing; power driven; lock stitch; single(Very heavy duty)needle; 12-inches depth of throat; cylinder bed; nonadjustablepedestal mounted; 97-10 or any equivalent model.SEWING MACHINE, INDUSTRIALDouble-throw zigzag sewing for rope tacking, power-driven; lock(Medium duty zigzag)stitch; single needle; 10 7/8-inches depth of throat; flat bed; w/rigidtable stand, 17W15 or any equivalent modelSEWING MACHINE, INDUSTRIALGeneral sewing; power driven; lock stitch; single needle, flat bed;(Light duty)w/rigid table stand; 10- to 13-inches depth of throat; 31-15 or anyequivalent model.5-2
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