Sloan & Chace No. 51/2 precision bench lathe. Because the bed was formed with two symmetrical V ways the milling and grinding slide could be fitted on a compound slide rest that was mounted back-to-front. The slide shown is carrying a collet-holding dividing unit fitted with interchangeable "notch" plates indexed by a spring-loaded pawl. In tradition of precision bench-lathes the headstock pulley was arranged with its smallest diameter towards the spindle thread so that the all-important front bearing could be surrounded with as great a mass of metal as possible. The edge of the largest spindle pulley was drilled with a single ring of 60 division holes (competitor machines had up to three rings) and the front of the bed immediately below the headstock had a short T slot machined into the first few inches of its front face so that a screwcutting attachment could be bolted in place.

Sloan & Chace No. 51/2 precision bench lathe fitted with an unusual design of screwcutting attachment. Instead of utilising the existing compound slide rest and driving the top slide by changewheels and a universally-joined shaft--as was commonly practiced by other makes--the Sloan & Chace employed a complete set of new parts including a proper leadscrew and a long raised "sub bed" carrying a carriage consisting of a saddle and cross slide unit.

Lever-action cut-off (sometimes called a  forming slide) topped with a short-travel lever-action tool slide.
Each toolpost could be adjusted precisely for height by turning a knurled-edge ring

Boring attachment with an eccentric-setting toolholder.

Left: fixed steady

Toolpost-mounted grinding attachment with pivot adjustment for height setting. The hand knob (by which means the stone was advanced and retracted) was free to spin on the shaft. A small adjustable stop was provided to set the depth of travel.

Tailstock to use with Grinding head.