Morse taper

noun

engineering a taper that is one of a standard series used in the shank of tools to fit a matching taper in the mandrel of a machine tool

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Word History and Origins

Origin of Morse taper¹

probably named after the Morse Twist Drill Co, Massachusetts, US

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Example Sentences

Examples have not been reviewed.

The taper shanks of twist drills are given a standard degree of taper of 5⁄8 inch per foot of length, which is termed the Morse taper.

From

A set of chuck drills, ranging from 3⁄8 to 3⁄4 inch, advancing by 1⁄32 inch, and a set of Morse taper shank drills ranging from 3⁄4 to 11⁄4 inches, by increments of 1⁄16 inch, will be all that is needed for the most pretentious repair shop, as it is cheaper to bore holes larger than 11⁄4 inches with a boring tool than it is to carry a number of large drills in stock that would be used very seldom, perhaps not enough to justify their cost.

From

Morse, Samuel F. B.mort

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