Here's a chart showing the usual dimensions of a Jacobs taper:
A lot of drill presses use a JT 33 taper. You can measure the diameter of the shoulder just above the top of the chuck to get an idea of which taper you're dealing with. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
