I don't use calipers for work, so pardon if this question exposes my ignorance;
For over 25 years I've been using a Mitutoyo 6" dial caliper for reloading. In recent years, I've purchased a couple of Harbor freight $10 dial calipers as inexpensive addtional spares. What puzzles me when comparing the two different dial faces, is that the Mitutoyo was designed to show 1/10 of an inch with the needle making a 180° revolution, traveling only half way around the dial face.......while the Harbor freight needle makes a full 360° trip around the dial to indicate the same 1/10 inch. Especially as my eyes get older, it is much easier for me to read the larger calibration markings and numbers on the Harbor freight caliper's dial face.
Is there a reason for designing the two differently?....or an advantage or disadvantage of the 180° rotation over the 360° to get the same readings?
For over 25 years I've been using a Mitutoyo 6" dial caliper for reloading. In recent years, I've purchased a couple of Harbor freight $10 dial calipers as inexpensive addtional spares. What puzzles me when comparing the two different dial faces, is that the Mitutoyo was designed to show 1/10 of an inch with the needle making a 180° revolution, traveling only half way around the dial face.......while the Harbor freight needle makes a full 360° trip around the dial to indicate the same 1/10 inch. Especially as my eyes get older, it is much easier for me to read the larger calibration markings and numbers on the Harbor freight caliper's dial face.
Is there a reason for designing the two differently?....or an advantage or disadvantage of the 180° rotation over the 360° to get the same readings?
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