Workholders - Hydra-Grip Arbors and Chucks

HOW THEY FUNCTION A.G. Davis - AA Gage ARBORS and CHUCKS function on the principle of expanding or compressing metals, within their elastic limits under hydraulic pressure. The self contained hydraulic system may be manually or power actuated. Explanatory drawings of a typical manually actuated chuck and arbor are shown to illustrate the basic principles upon which Davis hydraulically expanded chucking devices function. The actuator screw is turned clockwise, advancing the piston which places the hydraulic system under high pressure. In the case of a CHUCK shown in Figure (1) the compression sleeve is compressed over the full chucking area located between the hydraulic seals. Figure (2) illustrates how the expansion sleeve of a Davis ARBOR is expanded, under hydraulic pressure, on the gripping area between the hydraulic seals. There is no expansion of the gripping sleeve beyond the hydraulic seal area. The gripping or chucking area of the sleeves, under equalized fluid pressure, expand or compress uniformly from their geometric centerline assuring extreme accuracy in part positioning.

TOLERANCE RANGE A.G. Davis - AA Gage hydraulic arbors and chucks are guaranteed to function within the tolerances specified. These may range--according to part variables--from .0005 T.I.R. to .00002 T.I.R. CHUCKING - SIZE RANGE ARBORS--Minimum chucking diameter--1/4" CHUCKS--Minimum chucking diameter--1/16" MAXIMUM chucking diameters for both arbors and chucks are limited by part and tolerance variables.