RVF type

Nippon Bearing's Gonio Way family has adopted the RVF type with a flat installation surface for easy processing of tables and beds. NB Gonio Way (RVF type) is a low-friction, non-recirculating curved motion bearing utilizing precision cross-rollers. The RVF type is ideal for changing the gradient or for obtaining an accurate gradient angle without changing the center of rotation. This component is used mainly in optical equipment and industrial measuring devices where high precision is required.

Structure and Advantages

The NB Gonio Way RVF type consists of curved tracking bases with precisely ground V-grooves and flat installation surfaces, as well as a curved roller cage in which cross rollers are fitted. Precision rollers are employed as the rolling elements. Since the rolling elements do not recirculate, the frictional resistance will not vary significantly, providing curved movement with extremely low frictional resistance.

Flat Installation Surface Low Frictional Resistance and Minute Motion

The flat installation surfaces of the RVF type do not require complicated machining of tables and beds when installing the product. As a result, machining costs can be reduced greatly. The precision grinding work and curved roller cage allow for extremely low frictional resistance. The negligible difference between starting and dynamic frictions allows the RVF type to follow minute movements accurately, realizing curved movement of high accuracy.

Same Rotation Center

The curved V-grooves, which are finished with a precise grinding process, provide an accurate center of rotation. Furthermore, the products are composed to provide identical rotation centers when products of each size are installed to two axes. (Refer to Table H-17.)

Low Noise

Since NB Gonio Way employs a non-recirculating design, noise will not be generated at the circulating area. In addition, the curved roller cage realizes quiet operation without contact noise between the rolling elements.
Figure H-35 Structure of RVF Type Gonio Way Installation surfaceA-curved tracking baseEnd piece Installation surfaceCurved roller cage Installation surfaceB-curved tracking base H-58