| 摘要 |
PURPOSE: A concentricity measuring device for a rack housing is provided to increase the measuring precision by conveniently measuring and inspecting the concentricity of the yoke hole in the rack housing, and to reduce process and cost by excluding the transporting process. CONSTITUTION: A concentricity measuring device for a rack housing is composed of a holder(24) mounting a small lever(23); an upper ball arbor(22) composed of the portion of the rotary ball as large as a bearing insertion part(A) of a yoke hole(11) of the rack housing, and combined with the holder; and a lower ball arbor(21) composed of the portion of the rotary ball integrated with a bearing insertion part(B) of the yoke hole and connected to the lower part of the upper ball arbor. A projection of the lower part of the upper ball arbor is integrated with a groove of the upper part of the lower ball arbor. A groove is formed around the upper part of the upper ball arbor, and a pin hole is formed in the holder.
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