Standard Gage dial bore .0001" indicator
These indicators and dial bore gages are discontinued. Most parts are no longer available.
(For Standard dial indicator gage size 0 through 1 see page 172.)
The dial indicator portion of these bore gages is made by Kafer (Germany) although the bore gage may be labeled "made in Switzerland." The parts for the indicator fit directly into the bore gage housing. For that reason, the indicator alone can not be purchased separately. But, the entire indicator units (housing, indicator and handle) are available (see page 71). See below for older indicators not made in Switzerland.
Standard dial indicator model D1-20241-B-1 (.0001") does not have a revolution hand. The main hand goes around 3-1/2 times. It is preset at 10 o'clock.
The manufacturer claims the accuracy for this indicator is ± one graduation per total travel, and repeatability is 1/5 graduation.
The front of the indicator consists of:
The movement consists of the following components:
These parts do not apply to the old Poughkeepsie model no. D1-20241-B (made in USA) nor do they apply to the newer Dorsey brand bore gage indicators.
Repair hints: if the hand on the indicator shifts as much as 1/4 turn when you press on the sides of the case, then 9 out of 10 times it is due to loose screws on the brass plate which you will find underneath the movement. This requires careful disassembly and should only be attempted by skilled hands. We assume that vibration loosens these screws. In some cases, they are almost completely disengaged.