Designed by G H Thomas as a modification to the Myford Super 7 Top Slide, a full kit for this prized attachment is now available for the first time since 1994! For those who haven't seen one in action this upgrade provides truly significant advantages in both productivity and accuracy.
The small ball handle causes the complete Top Slide (with tool) to retract by around 5/32" (4mm). This greatly facilitates the cutting of both external and internal threads. It is also valuable for those final finishing cuts on both diameters and faces.
A much larger micrometer (100 x 0.001" graduations) dial is used, which can be zeroed and positively locked. The dial and feed handle are connected to the feed screw by a pair of gears, which allows the feed handle to be moved upwards and outwards, thus reducing the tendency for the feed handle to foul the tailstock body or the cross slide handle. Other than for worm threads, a modified Super 7 will now rarely require back gear for precision screw cutting.
The kit includes semi-finished blanks for the Left Hand Acme feed screw and nut (10 tpi only), the 2 necessary gears, and ALL required fasteners, springs and steel, brass, bronze and aluminium sections. In addition, the kit includes updated solid model CAD drawings and instruction notes; all you need to add is your time and capabilities!