Abstract: An adjustable gage comprises a centerline hub and a swing gage. The hub includes a body with position jaws adjustably attached thereto, and a central post. The gage comprises a pair of parallel slide bars and front and rear blocks slidable along the slide bars. A movable, spring-biased probe is slidably connected to the front block via a rail and carriage bearing apparatus. The probe is operably connected to a probe-movement indicator. The rear block has a fixed probe. Both probes have end roller bearings. In use, the part to be measured is placed within the position jaws, previously adjusted to the approximate inner or outer diameter of the part. Then, the gage is placed over the post, with the roller bearings coming into contact with the part, and the gage is rotated. The probes track along the part, with any variances in part diameter showing up on the indicator.

Abstract: An adjustable gage comprises a centerline hub and a swing gage. The hub includes a body with position jaws adjustably attached thereto, and a central post. The gage comprises a pair of parallel slide bars and front and rear blocks slidable along the slide bars. A movable, spring-biased probe is slidably connected to the front block via a rail and carriage bearing apparatus. The probe is operably connected to a probe-movement indicator. The rear block has a fixed probe. Both probes have end roller bearings. In use, the part to be measured is placed within the position jaws, previously adjusted to the approximate inner or outer diameter of the part. Then, the gage is placed over the post, with the roller bearings coming into contact with the part, and the gage is rotated. The probes track along the part, with any variances in part diameter showing up on the indicator.

Abstract: A gage that measures the size and out of roundness of the inside and outside diameters of ring-shaped parts comprises a centerline hub body together with a free style swing gage. The centerline hub body has extensible jaws that can be adjusted to position the body within the central opening of the part. A vertically protruding cylindrical post is located at the center of the hub body and is adapted to interface with the free style swing gage. The free style swing gage comprises a pair of parallel cylindrical rods that are adapted to fit over the centerline post. On each end of parallel rods is disposed a block, each block having a probe that protrudes downward from the block and is operable to contact a surface of the part to be checked. A front block is associated with a dial indicator connected with the probe to indicate any deviations in size or diameter of the part to be checked.