Machine Design
Tapered roller bearings can take

Axial load only
Radial load only
Both radial and axial loads and the ratio of these being greater than unity
Both radial and axial loads and the ratio of these being less than unity

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Obtain variable moment of inertia (I) in each leaf
Permit each leaf to act as an overhanging beam
Make M/I constant throughout the length of the leaf
Have variable bending moment (M) in each leaf

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