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Regulating the Length of a Stitch
Setting the Needle

Aircrew Survival Equipmentman 2 - Aviation theories and other practices
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As on any Singer sewing machine, the balance constant use. Use a castor base oil as wheel of the 7-33 should always turn toward the recommended by the manufacturer. operator. Needles and Thread Lubrication The procedure for ordering needles is the same The 7-33 machine is oiled at all the oiling for the 7-33 machine as for the 31-15 sewing points shown in figures 9-17 and 9-18. The machine. Refer to table 9-2 for the relative sizes machine should be oiled twice daily when it is in of needles and thread. Figure 9-17.—Oiling points at the front of the 7-33 sewing machine. Figure 9-18.—Oiling points at the back of the 7-33 sewing machine. 9-14 239.274 239.275







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