The Jarno taper is used on machine tools such as profiling machines and die sinking machines. It is also commonly used for the headstock and tailstock spindles of some lathes. The taper per foot of all Jarno tapers is .600" inch on the diameter. Thread Check Inc. designs and builds custom tapered plug gages for a wide range of industries and applications. Other types of tapers include medical luer tapers, Cat V Flange Tapers and Steep Machine Tapers.