Explain the difference between locating and non-locating bearing arrangements.

In a locating-non-locating arrangement, the locating bearing (usually near the drive end) is axially fixed on both shaft and housing to position the shaft. The non-locating bearing (at the other end) allows axial movement to accommodate thermal expansion. For a 1m steel shaft with 50C temperature rise, expansion is about 0.6mm. Without this arrangement, thermal stresses could overload bearings. Alternative: cross-located arrangement with back-to-back angular contact bearings.