With Press Fit conveyor bearing mounts, the roller tube diameter is slightly smaller than the body of the conveyor bearing. The conveyor bearing is pressed mechanically or hydraulically into the tube using a special adapter against the conveyor bearing. Click for profile diagrams of Press Fit and Counterbore Press Fit
Press Fit conveyor bearings generally are designed in a “Closed” style or a “Radial Thrust” style. Click for a profile diagram of Closed style
and Radial Thrust style Press Fit
mounts. Basically, these designs allow uniform pressure on the housings and outer races providing optimal “seating” within the tube.
Given that the quality of the conveyor bearing mount is directly proportional to the life of the conveyor bearing and its performance, FRANTZ has engineered its conveyor bearings to the style of the mount so that customers are best equipped to have a bearing that delivers optimal performance. (Click for FRANTZ Mounting Specifications
.) Design to mount
is a FRANTZ value that is unique in the marketplace.
FRANTZ recommends that the tube diameter interference against the conveyor bearing should optimally be between .003” and .005” for best press fit results with .008” as an absolute maximum. Certain applications require a “Heavy Press”. Conveyor bearings with more rigid races (such as the FRANTZ 400, 4113 and 2500 series bearings) will tolerate a tighter fit (interference up to .020") and heavier press.
Thicker walled tubes can be counterbored or reamed with the conveyor bearings press fit into the bored tube. Some counterbored roller applications call for conveyor bearings without flanges. FRANTZ offers a variety of conveyor bearings without flanges to meet this need. Counterboring is recommended when the application requires heavy walled tube or pipe and when fit up needs to be very precise such that it warrants the additional labor cost to counterbore or ream.
For a more economical approach, FRANTZ offers a variety of Press Fit conveyor bearing options that will match standard tube diameters with the appropriate interference. This eliminates costly reaming and counterboring of tube ends while still producing acceptable mounts. Our metal IronGrip
adapter housings will outperform competitor’s plastic housings in keeping your mounting tight and preventing your conveyor bearing from walking out of the tube.