Differential Micrometer, 13 mm Coarse, 0.2 mm Fine, 462 Stage Bracket

The DM-13B Differential Micrometer offers sub-micron resolution in a unique design that achieves long range and fine adjustability in a single micrometer. The DM-13B has a 13 mm overall range with 0.2 mm fine adjustment range and is supplied with a micrometer mounting bracket compatible with M-462 Series stages. Note that the micrometer mounting bracket(s) supplied with the 462-series stages are sized for 1.0-in. (25 mm) travel. Therefore, the DM-13B includes a different micrometer mounting bracket which accounts for the shorter 0.5-in (13-mm) range, allowing symmetric travel about the 462’s nominal position. It employs the same mounting bezel as our standard SM Series Micrometers, so it may be used to easily upgrade an existing instrument to provide, in most cases, a factor of 10 improvement in resolution. In effect, we have built a differential micrometer outside of a standard micrometer - a simple concept that is difficult to implement. The motion it provides is exceptionally smooth and crisp, without tightness or difficult turning. The DM-13B provides excellent linearity and absolute accuracy better than 1%, and its unique design exhibits no harmonic motion errors typical of conventional differential screws.