On 3/3/2010 14:36, Louis Ohland wrote:

Chuck Chuck Adapter
(Top) (Bottom)
4.454 4.487 4.470
4.451 4.504 4.470
4.454 4.484 4.468

From the measurements, the bolt circle at the top of the chuck is @
4.501+, the bolt circle at the bottom of the chuck is 4.485+, and the
adapter bolt circle is 4.470-.

Bolt circle at top of chuck is _4.451+_, not 4.501 (dyslexia)