The Bearingizing Tool combines roller burnishing with peening action. As the tool is rotated at a high speed the rolls spin, rise, and fall over a cammed arbor, delivering up to 200,000 rapid fire blows per minute to the work surface. The peaks and valleys of the machined surface are compacted into a smooth, hardened, and ultra fine surface finish.

The Bearingizer may be the tool of choice when the following conditions exist:

• Parts with thin walls — Bearingizing eliminates barrel-shaping of the part.
• Parts with irregular wall thicknesses — the Bearingizing tool will produce a very round hole, whereas the Roll-a-Finish® tool might generate a slightly egg-shaped hole, due to variations in wall thickness.
• Applications where porosity is an issue (e.g., oil-impregnated bearings) — the smaller “footprint” of the Bearingizing roll leaves pores in the surface intact.
• Applications where very tight tolerances must be held — the Bearingizer reduces springback in the work surface material. The Bearingizing tool can, in some materials and with proper part preparation, hold size as close as ±.0001 inch (.002mm), while the Roll-a-Finish tool can achieve tolerances of ±.00025 inch (.006mm).