The ram driving mechanism.
The large gear wheel was 1" wide, of 10 d.p. and made from a semi-steel iron. The slotted crank arm was in nickel-chrome-vanadium with a ground finish on its outer surfaces and ground and lapped on the inner "slide" ways.
The upper crank pin ran on an Oilite bush with the stroke-positioning screw, crank pin and slide lubricated through a wick oiler contained within the ram clamp screw handle; the lubrication for the slide must have been inadequate for later models had an oil hole drilled through the center of the "slide cover plate".
The large "bull" gear was supported by a roller bearing at its near side to absorb the considerable radial loads placed on it and, at the end of its shaft to take thrust loadings, a deep-groove ball race.

The ram was heavily built and its ways bore on the top, side and bottom surfaces of the guides - which had oil grooves to hold a supply of lubricant.

The column was a box-type casting with a braced and ribbed interior and sat on a base strengthened with open ribs.
The large bosses for the bull-wheel pinion and crank-lever line shafts were bored and then lined reamed.
Later models had a longer base with rectangular block for the table-support screw to slide along.