Insert Bearings

Insert bearings and wide inner ring bearings are used for mounting on shafts without the need for shoulders, locknuts, or adapters. The bearing is locked in place through setscrews or a locking collar. The inner ring usually extends on both sides of the bearing to provide extra shaft support. 

Generally, insert bearings are standard radial bearings that have been adapted to fit into a housing.  Although they are generally sold with the housing, these bearings may also be purchased as stand-alone products to use as replacements.  While standard radial ball bearings must be pressed into a machined shaft, using special installation tools, insert bearings can be slip fit directly onto the shaft.  However, insert bearings are typically mounted onto shafts that are slightly smaller than the bearing bore diameter.

Insert bearings, however, are mounted to a shaft that is typically slightly smaller than the bearing bore diameter.  This loose fitting necessitates a locking device to hold the bearing securely in place. The inner ring of the bearing is extended to one side to accommodate the locking device. In addition, the width of the insert bearings inner ring may vary according to the type of the bearing. 

A related style of insert bearings is the wide inner ring bearing. The wide inner ring, or double extended inner ring insert features an inner ring that extends beyond the width of the outer ring on both sides of the insert. The extension on one side accommodates a heavy-duty seal. The other side is extended even further to accommodate both a heavy-duty seal and the locking device.  Wide inner ring insert bearings also distributes the load over the larger surface area created by the wider inner ring. These bearings are generally used for heavier duty applications.  Some manufacturers create inserts that fall between narrow and wide inner ring inserts. By combining features of both they create a more economical "will-fit" that is neither a true narrow or wide inner ring.

In addition to allowing motion and support, many insert bearings are designed with seals to provide protection from contamination and as a retainer for lubricant.  They may be designed with single or double seals, or single or double shields to prevent the ingress of dirt.  However, open bearings, which lack shields or seals are also available. Open bearings offer no protection from contamination or lubricant containment, but have higher maximum speed capabilities than bearings with seals or shields.

• How to Select an IRAX Carbide Bur
  Step 1: Establish which shape bur would best conform to the contour being machined. Step 2: Decide on the type of cut needed. The factors governing this selection are the materials being cut, the...
  (read more)
• Operating Procedures for Wide Orbital Sanders
  In the production of cabinetry, following wide-belt sanding, any rails on sanded panels must be smoothed out. This step is performed using a wide orbital sander. There are right and wrong ways to set...
  (read more)
• Can Users Machine PolyLube Guide Rod Bushings to Tighter Tolerances? If Yes, How?
  Q: "Can Users Machine PolyLube Guide Rod Bushings to Tighter Tolerances? If Yes, How?" A: First, Polygon recommends that secondary ID or OD fabrication by the user group community only be performed on...
  (read more)

Pages: 1 - 3 of 111

Part Numbers for Insert Bearings