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What does the fraction in the specification model of a socket wrench represent?

1 Answers

MacMarcus

07/25/25 9:09am

It represents the size of the wrench opening in inches. One inch equals 2.45 centimeters, and lengths smaller than one inch are expressed as fractions of an inch. For example: 1/2 means half an inch, and 1-1/2 means one and a half inches. Conventionally, one-eighth of an inch is called a 'fen'. For instance: 1/2 = 4/8 inches, which is called 'four fen'; 3/4 = 6/8 inches is called 'six fen'. Common specifications for socket wrenches include: 1/2×10"×36T, 1/4×6"×36, 3/8×7-1/2"×36, 3/4×20"×24. Differentiation of model specifications: Generally, the model specifications of ratchet wrenches are distinguished by the size of the square drive, the length of the ratchet, and the number of teeth inside the ratchet. For example, 1/2×10"×36T refers to a square drive of 1/2, a ratchet length of 10 inches, and 36 teeth on the gear. Common specifications include: 1/2×10"×36T, 1/4×6"×36, 3/8×7-1/2"×36, 3/4×20"×24, etc.

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