Use this Co-AX Dial Indicator to quickly centre work pieces or fixtures on your mill. No walking around the machine necessary, no mirrors required. The Co-Axial indicator dial remains stationary while the machine spindle rotates. Exact chucking not needed. Operates at any angle from horizontal to vertical without any change and from internal to external by simply changing the feeler. With so much indicator travel either way you can dial a hole or diameter in a matter of seconds. Can also be used to align a lathe tailstock.

From other suppliers $230 -$312

See these youtube videos showing how to use a Co-Ax indicator

https://www.youtube.com/watch?v=mU1ewk36zAw https://www.youtube.com/watch?v=r7-eEj_qq5M https://www.youtube.com/watch?v=tJrPLOq1T6A&t=27s

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