What Are the Dimensions of a 6.35 mm x 12 mm Shaft Coupling?

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SUMMARY

A coupling described as 6.35 mm x 12 mm indicates that the inner diameter (ID) is 6.35 mm, which corresponds to a 1/4" shaft size. The outer diameter (OD) is 12 mm, which is the size of the shaft on the opposing side designed for attachment. The dimensions are critical for ensuring compatibility between shafts in mechanical applications. The type of coupling may influence whether these dimensions are interpreted as ID x OD.

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LickMyEyeball
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When a coupling is described as being 6.35 mm x 12 mm, what does this mean?

I figure that 6.35 mm is the shaft diameter it accepts because that diameter equals 1/4". Is 12 mm the size of shaft the opposing side is designed to attach to?

Thank you in advance.
 
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