Fowler 52-217-075 Metric Micrometer with Satin Chrome Finish, 0-75mm Measuring Range, 0.01mm Graduation Interval, 0.001mm Accuracy, Set of 3

The Fowler 52-217-075 outside micrometer set has a flat anvil/spindle pair with a 0 to 75mm measuring range and 0.01mm graduations for general purpose measuring. The three micrometers have a measuring range of 0 to 25mm, 25 to 50mm, and 50 to 75mm. The Vernier scale has 0.01mm graduations and an accuracy of 0.001mm for precise readings and accurate measurements. The anvil/spindle pair has a 6.5mm diameter, 0.00076mm flatness, and 0.000125mm parallelism on the 0 to 25mm micrometer for accurate measurements. Hardened, ground, and micro-lapped measuring faces provide wear resistance. The hardened, ground, and lapped spindle thread provides smooth movement, accuracy, and long life. The 0 to 25mm and 25 to 50mm micrometers have a friction thimble that applies constant force for repeatability between users. Friction-style thimbles are suitable for one-handed operation and stop turning when the spindle comes into contact with the workpiece, providing constant force for consistent measurements between operators. The 50 to 75mm micrometer has a ratchet-stop thimble that can be used independently of the friction thimble. It provides an audible sound and stops the spindle from turning when the spindle comes into contact with the workpiece, providing constant force for consistent measurements between operators. A satin chrome finish on the thimble and sleeve helps reduce rust and glare, providing durability and long life, and microfine graduations help ensure accurate readings. The baked-enamel frame provides durability and long life. The micrometer set includes three micrometers with an overall measuring range of 0 to 75mm, 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 52-248-001 0 to 25mm micrometer with friction thimble
• Fowler 52-248-002 25 to 50mm micrometer with friction thimble and standard
• Fowler 52-248-003 50 to 75mm micrometer with ratchet thimble and standard
• Wrench
• Fitted case