Bore clock

[mklotz]

Having made a similar device...

Simplifying the measurement of bores

I'm interested in how yours operates. Am I correct in assuming that the small knurled screw pivots the movable measuring arm, said movement recorded on the dial indicator (here in the colonies "clocks" tell time) ? Then the micrometer is applied to the measuring points and adjusted until the DI reading is duplicated at which point the micrometer reflects the bore diameter ?