Gear pitch gauge

Details Gear pitch gauge Gear pitch gauge

G - Physics

01

B

33/143

G01B 5/16 (2006.01)

Patent

CA 1096608

GOK 103-083 ABSTRACT OF THE DICLOSURE The extent of non-uniformity of the teeth on a gear wheel or on a rack may be readily checked using a hand- held adjustable gauge providing a range of capability for teeth of differing pitch and size, the gauge having an adjustable datum screw by which the body of the gauge is positioned above the tooth tip so as to locate a depending mixed probe point against the flank of a tooth, closely adjacent the pitch circle, A moveable probe is set in cor- responding contracting relation against the flank of another tooth and a dial test indicator coupled thereto is centred to give a preliminary null reading. The gauge is then relocated without further adjustment on another pair of teeth and the variation in pitch distance from the first or null value is read off the gauge as a positive or negative value indicating a lesser or greater pitch distance between the respective teeth. In the case of very large gear wheels the outer diame- ter of the tip of the teeth may be centric to the pitch circle of the gear. In such cases a band concentric with the pitch circle is machined, usually on the outer diameter of the gear, to facilitate accurate use of the gauge.

304567

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