Bench micrometers can substantially improve the precision of micrometer measurements. Particularly when the objects to be measured are small. The stable position of the instrument during the measurements permits a more precise locating of the work and the heavy base adds to the rigidity of the instrument. Bench micrometers are usually equipped with both large-diameter spindles and thimbles, permitting a finer pitch thread for higher sensitivity, and direct reading in ten-thousandths , or smaller.
Micrometer heads without a frame as an integral part have wide applications in the instrument building field. One of the more frequent uses is the controlled displacement of slides, either single or cross slide . Commonly, the micrometer will move the slide against a moderate spring pressure, which is applied to assure a positive contact between the micrometer spindle face and the contact point on the slide face. Springs exerting a uniform force along the entire slide traverse are preferred.