TM-9-2350-277-40&P Sustainment Maintenance Manual M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TORQUE WRENCH ADAPTERS AND CONVERSION FORMULA 1. Torque wrench adapters (extensions) are used to tighten screws and nuts to specific values that cannot be reached with a regular socket on the end of a torque wrench. This makes the dial or scale reading less than the actual torque applied to the screw or nut. When using an adapter, determine the dial or scale reading as follows: a. Check your manual for specific torque value to which the screw or nut should be tightened. b. Measure the length of your torque wrench, from the center of the handle (point A) to the center of the socket (point B). Record this measurement. c. Multiply the above measurement by the desired torque. Record this sum. d. Measure length of adapter from socket end (point C) to screw or nut end (point D). Record this measurement. e. Add length of adapter Step d to the length of the torque wrench Step b. Record this sum. f. Divide the sum found in Step c by the sum found in Step e. g. The sum found in Step f is your torque wrench setting. Figure 6. Torque Wrench Adapter. NOTE Setting the torque wrench dial at the reading found in Step g will deliver the required torque at the end of your adapter. h. Set your dial. Example: (Metric equivalents omitted for clarity). 40 lb-ft required. 12 inches. 12 x 40 = 480. 4 inches. 12 + 4 = 16 inches. 480/16 = 30 lb-ft. Torque wrench dial setting = 30. TM 9-2350-277-40&P 0004 0004‐4