| Notes |
The Equipment of Drilling Machines. Automatic chucks, action of roller jaws in Gronkvist chuckspecial spindle attachments, speed-up & high-speed drilling attachments (Machine Tool Attachment Co., Manchester, tapping attachments, non-stop type of drill chuck (E.G.Wright), floating drive drill chuck (J.W.Barnes), tools made for holding in Barnes' chuck, reversing tapper with positive or friction drives, Pearn tapper (Smith & Coventry), stud driving attachment for drilling machine, attachment for backing out taps, studding attachments |