What is the reason the inner ring of some roller bearings are tapered, while others are flat-bored. What are some of the typical applications for roller bearings that are tapered on the inner ring?
The tapered ones are made to take a side force. .
tapered roller bearings not only can support a radial load, but they can also resist an axial load. This makes them useful on helical gearshafts because helical gears give axial loads. You can find these in transmissions, many types of gearboxes, many places that have rotating shafts which may require that the shaft be subjected to axial loads.
