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Can someone help me with Hertzian contact analysis (How to find Curvature Sum)

Can someone help me with Hertzian contact analysis (How to find Curvature Sum)

Can someone help me with Hertzian contact analysis (How to find Curvature Sum)

(OP)
Here are the equations:

1/Rx = 1/rax + 1/rbx

1/Ry = 1/ray + 1/rby

1/R = 1/Rx + 1/Ry

I don't understand what the radius x and y values are how to tell whats what, the question I have been given is this:

The ball-outer race contact of a deep groove ball bearing has 10mm ball diameter, a 5.5 mm outer race concave groove radius and a 45 mm radius from the bearing axis to the bottom of the groove. The load on the ball is 500 N and the race and the ball are made of steel (E=206 GPa, v = 0.30). Apply Hertzian Contact Analysis to determine.

(a) - Curvature Sum (Include diagrams to define contact geometry).

From this I reckon it is talking about a rolling element bearing?

I know how to do the rest of the questions but I really don't understand how to find the curvature sum. I have searched on google and youtube but all I find is reports and simulations, none of which actually explain anything.

Thank you.

RE: Can someone help me with Hertzian contact analysis (How to find Curvature Sum)

(OP)
bump

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