Nachi bearings are precision manufactured in our totally automated and fully integrated bearing plant. Full integration allows Nachi a high quality start with the advanced bearing steel, which is produced in our own steel mills to our own exacting specifications.

Nachi make the highest-capacity Spherical Roller Bearing in the industry. They are subjected to a heat-stabilisation treatment as standard. Nachi Spherical Roller Bearings can be used at operating temperatures of up to 200 C with minimal dimensional changes occuring.Nachi produce a comprehensive range of high quality precision bearings for a wide variety of applications.

Nachi Bearings usually consist of an inner ring, outer ring, and rolling elements (balls or rollers), and a cage which positions the rolling elements at fixed intervals between the ring raceways. Nachi Standard materials for inner and outer rings, and for the rolling elements, are high carbon chromium bearing steel or case hardening steel. The Nachi bearing steel is heat-treated to an appropriate hardness to attain optimum resistance to rolling fatigue. [Nachi Bearings] surfaces are ground to a very high accuracy using special machine tools. While each of the various types of Nachi bearings has special features, the following features are common to most Nachi rolling contact bearing types:

•Nachi Rolling contact bearings have relatively low starting resistance. There is little difference between the starting and running resistance of rolling contact bearings. 

•Nachi Dimensions and accuracy are standardized. Ready-made products of high quality are easy to obtain. 

•Compared to “sliding” bearings, Nachi rolling contact bearings are less prone to wear and help to maintain the accuracy of the machine in which they are used. 

•Nachi Rolling contact bearings consume small amounts of lubricant and are far less costly to maintain than sliding-type bearings. 

•While not common to all Nachi rolling contact bearings, many types can sustain both axial and radial loads. To get optimum performance from a selected bearing, it is necessary to understand the design and features of the various bearing types and to then select bearings optimal to individual machine performance. 

Nachi Deep Groove ball bearings are the most popular of all the ball bearing types because they are available in a wide variety of seal, shield and snap-ring arrangements. The bearing ring grooves are circular arcs made slightly larger than the radius of the ball. The balls make point contact with the raceways (elliptical contact when loaded). The inner ring shoulders are of equal height (as the outer ring shoulders).

Nachi Deep Groove ball bearings can sustain radial, axial, or composite loads and because of simple design, this bearing type can be produced to provide both high-running accuracy and high-speed operation. Nachi Deep Groove ball bearings having an outside diameter less than 9 mm are known as Miniature ball bearings. Nachi Deep Groove ball bearings having an outside diameter => 9 mm and a bore diameter < 10 mm are known as Extra-small ball bearings. Nachi Standard ball retainers (cages) are made from pressed steel. Machined cages are used in bearing operating at very high speed or for large diameter bearings. Deep groove ball bearings with seals or shields are standardized. They contain proper amount of grease in advance.