You can buy a three-jaw chuck in many places, such as Grizzly:  <a href="http:&#x2F;&#x2F;www.grizzly.com&#x2F;catalog&#x2F;2016&#x2F;main&#x2F;383?p=383" rel="nofollow">http:&#x2F;&#x2F;www.grizzly.com&#x2F;catalog&#x2F;2016&#x2F;main&#x2F;383?p=383</a><p>It should be relatively simple to retrofit one of these to an existing brace with a different chuck. If the brace doesn&#x27;t have a matching taper, a machinist should be able to turn it or put a thread compatible with a chuck on it.