Adding An Extension To A Torque Wrench
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Formula:
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Length (L) =
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Effective length of the wrench as described below. | ||
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Dial Wrenches =
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The measured distance from the center of the square drive to the center ring or notch on the handle. | ||
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Micrometer Wrenches =
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The measured length from the center of the square drive to the center of the handle, with the wrench set at the desired torque reading. | ||
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Desired Torque (TA) =
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The torque value designated for the fastener with or without an adapter. | ||
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Added Length of Adapter (A) =
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The measured length from the center of the adapter drive to the center of the wrench square drive. | ||
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New Setting (TW) =
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The torque setting on the wrench allowing for the added length of the adapter. This reading will be lower than the desired torque. | ||
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Example:
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250 ft. lb. Dial Wrench using a 2” long crowfoot adapter L = Effective Length: 18.75” Desired Torque = 250 ft. lb. Length of Adapter = 2” |
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Result:
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