Apparatus for measuring workpiece concentricity

Details Apparatus for measuring workpiece concentricity Apparatus for measuring workpiece concentricity

1992-07-14

1993-02-02

Haroian, Harry N.

Geometrical instruments

Gauge

With support for gauged article

G01B 520

Patent

active

051828650

ABSTRACT:
An apparatus for measuring workpiece concentricity having a base, a concentricity spin fixture, a spring-biased shaft, a collet, a follower member, and a concentricity indicator. The concentricity spin fixture receives a collet which receives workpieces of varying shank diameters and drive profiles. A follower member designed to engage a specific workpiece drive profile is biased against the workpiece drive profile by the spring-biased shaft. A test operator measures concentricity by rotating the workpiece using the concentricity spin fixture and by measuring the movement of the follower member against the spring-biased shaft using the concentricity indicator. The apparatus is capable of measuring the concentricity of workpieces having a shank and a drive profile, such as screws, bolts, other fasteners, and punches.

REFERENCES:
patent: 2806294 (1957-09-01), Cargill
patent: 4679330 (1987-07-01), Williams
Universal Concentricity Gages, The Modern Way to Increase Gaging Efficiency, Universal Punch Corp., Santa Ana, Calif.

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