How to get optimum performance of a lathe chuck by properly loading the jaws before boring or grinding the gripping surfaces.#practitioner_of_the_mechanical_artsPaypal donation https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=W64WRAAGMA79J&source=urlSupport through Patreon https://www.patreon.com/ROBRENZ