rear axle key orientation

[wbs]

hello- i read all the posts on with many descriptions but no pictures- rear axle key orientation is said to be a cause of hub splitting and orietntion is often described as 'up' or 'down' but i have trouble understanding this.

so pls look at my rough sketch and tell me which is correct, fig 1 or fig2---it seems to me that the key contour ought to fit the groove rounded contour thank you

[Mitch//pa]

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https://fordbarn.com/forum/showthread...light=Axle+key