A detail of great importance in all worm conveyors is the intermediate bearing; this, if cumbersome, obstructs the passage of the material, a drawback which must carefully avoided. As all adjustable bearings are in halves and of necessity bulky, it is preferable to choose whole or bush bearings, although they lack some advantages that the former possess. The best intermediate bearing is a small phosphor-bronze bush connected by a short piece of pipe to a cast-iron support. The pipe is screwed into the support and secured by means of a lock nut. The Figure illustrates another type of intermediate bearing. It is similar to that illustrated
in the description above, with the exception that the bearing is in halves and the cap held in position by two oblique supports, which give it greater rigidity. Such bearings are suitable for worms of large diameter.