Fowler 52-224-220 Metric Outside Digit Micrometer Set, 0-75mm Measuring Range, 0.01mm Graduation, Set of 3

Fowler 52-224-220 metric digit micrometer set has a 0 to 75mm measuring range and a flat anvil/spindle pair with a 6.5mm diameter measuring face for general purpose measuring. The digit display has 0.01mm graduation intervals and an accuracy of 0.001mm for precise readings. A secondary Vernier scale with 0.001mm graduation intervals has an accuracy of 0.001mm. Microfine graduations on a satin chrome finish provide clear reading. The positive locking nut on the spindle locks measurements in place for accurate readings. A zero adjustment on the sleeve ensures accurate measurements. The anvil/spindle pair have hardened, precision-ground, and micro-lapped measuring faces with 0.00003" flatness and 0.00005" parallelism on 0 to 25mm micrometers to provide accurate measurements. The spindle thread is hardened, ground, and lapped to provide smooth movement, accuracy, and long life. 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 grey baked-enamel frame provides durability and is heat-insulated to reduce temperature-related expansion or contraction providing for accurate measurements. The micrometer includes 0 to 25mm, 25 to 50mm, and 50 to 75mm micrometers, 25mm and 50mm standards, a wrench, and 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 52-224-009-0 0 to 25mm micrometer
• Fowler 52-224-010-0 25 to 50mm micrometer with standard
• Fowler 52-224-011-0 50 to 75mm micrometer with standard
• Wrench
• Fitted case