Group 3 dial indicators have large dials about 2.75" in diameter. The exact diameter can vary slightly from manufacturer to manufacturer. It is harder to make a large face indicator which remains accurate. You should only use these if there is a specific reason. Perhaps your dials are at some distance from the viewer and a larger face is need so that it can be seen. Otherwise, stick to the Group 2 dial indicators which offer the same specifications but are less troublesome and will cost you less as well. Refer to page 202 for Group 2 indicator comparisons.
Starrett indicator with large dial
- Mitutoyo: made in Japan
- Starrett: made in USA
For additonal information, please click on any linked (shown in brown) model number below.