Fowler 52-218-111 Spline Micrometer with Satin Chrome Finish, 0.0001" Graduation, 0.0001" Accuracy

The Fowler 52-218-111 Vernier-style micrometer with spline-style anvil/spindle pair has a 0 to 1" measuring range to measure the outside diameter of splines, grooves, and recesses. The faces have a 0.118" diameter and a 0.394" length for measuring small-diameter recesses. The Vernier scale has 0.0001" graduation intervals and an accuracy of 0.0001" for precise readings. Microfine graduations on satin chrome finish provide clear reading. The anvil/spindle pair have hardened, precision-ground, and micro-lapped measuring faces with 0.00002" flatness and 0.00005" parallelism for accurate measurements. The ratchet stop thimble provides an audible sound and stops turning when the spindle comes into contact with the workpiece, providing constant force for consistent measurements between operators. The micrometer includes a fitted case.

Micrometers are precision measuring instruments that use a calibrated screw to measure distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.

The Fred V. Fowler Company manufactures inspection and measurement instruments such as electronic indicators, calipers, bore gages, and digital scales. The company, founded in 1946, is headquartered in Newton, MA.

What’s in the Box?

• Fowler 52-218-111 micrometer
• Fitted case