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Ross yoke a = h = 20

Ross yoke a = h = 20: Ø3 running hole on the crank pin at the bottom vertex, Ø3 press holes for the two con-rod pins at ±20 and the rocking pin between them

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

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Ross yoke a = h = 20 for two parallel cylinders: every size, notes, mating features and sources. What is a Ross yoke linkage?