1B8743 Key-Woodruff Fits Caterpillar ModelsOne New Aftermarket Replacement Woodruff Key for Caterpillar (Cat) Crawler Dozers and Pipelayers This aftermarket replacement Woodruff key (part number 1B8743) is a precision fit shaft key used to transfer torque load from a shaft to a working gear or pulley. Woodruff keys are semi circular in profile and seat in a matching keyway machined into the shaft, preventing rotational slippage between mated components. This key is a direct replacement for
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