Tapers
Jacobs Taper The Jacobs Taper (abbreviated JT eg JT0 or JT3) is commonly used to secure drill press chucks to an arbor. Taper Large End Small End Length Taper/ Foot Taper/ Inch 1/2 Included Angle #0 0.2500″ 0.2284″ 0.44″ .5915 .0493 1.4117° #1 0.3840″ 0.3334″ 0.66″ .9251 .0771 2.2074° #2 0.5590″ 0.4876″ 0.88″ .9786 .0816 … Read more