What Are Some Common Jacobs Chuck Key Sizes?


Quick Answer

The most popular chuck keys on JacobsChuck.com in 2016 are KG1, KK, K0, K0M, K1, KGA and K1M, which range in size from 1/8 inch to 9/32 inch. All the most popular sellers have 11 teeth except for KK, which has ten.

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Full Answer

The most common Jacobs Chuck Key model is KG1. Its pilot size is 1/4 inch. The next most common is the 9/32 inch model KK followed by the 1/4 inch KGA. Models K0 and K0M are 1/8 inch and models K1 and K1M are 5/32 inch. The next most common models are K2, K3, K4 and K5, which range from 1/4 inch to 7/16 inch.

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