Torque Multiplication Conversion

NOTE: When using a torque wrench adapter, the distance from the torque wrench drive to the adapter drive changes the actual torque value. Apply the following formula (A x B / B + C = D) to obtain the correct torque value.

Record the torque value to be obtained as A.
Measure the distance from the center of the torque wrench handgrip to the center of the torque wrench drive. Record this measurement as B.

Fig 1: Measuring Distance From Center Of Torque Wrench Handgrip
Courtesy of FORD MOTOR CO.
Measure the distance from the center of the torque wrench adapter opening to the center of the torque wrench adapter drive. Record this measurement as C.

Fig 2: Measuring Distance From Center Of Torque Wrench Adapter Opening
Courtesy of FORD MOTOR CO.
Example: multiply the torque value to be obtained A (120) by the length of the torque wrench B (12). Add the length of the torque wrench adapter C (2) to the length of the torque wrench B (12). Divide the product of A x B (1440) by the sum of B + C (14) to obtain the torque multiplication conversion D (103).

Fig 3: Identifying Torque Multiplication Conversion D Formula
Courtesy of FORD MOTOR CO.