The optional Slotting Head (Code JEAF) had a maximum length of stroke of 2 inches with 7 inches of clearance from the centre of the 5/8" diameter cutter holder to the face of the column.

The No. 2 Morse taper Vertical Head (Code JIFF) was a simple affair, capable of being swivelled but without a quill feed. The clearance from the centre line of the cutter to the column face was 6.75 inches and the maximum clearance below the spindle nose and the table 105/8 inches.

Denbigh Type C.V.S. Semi-Universal Miller
The C.V.S. (constantly-variable speed) variable-speed drive miller was based on the ubiquitous Model C and offered both speed control from a single lever and a table with power feed in both directions. Two models were manufactured, the Type 2 and Type 4, with table lengths of 34" x 10" and 46" x 10" and longitudinal feeds of 21.5" and 33.5" respectively. All models were fitted with tables able to be swivelled 45 degrees either side of their central position - hence the maker's  designation of the machine as "Semi-universal".
The variable-speed drive gave a range of spindle speeds from 30 to 700 rpm and included, like other Denbigh millers, a double backgear assembly. with back-gear set in its first position a range from 30 to 90 rpm was available; in its second position 90 to 260 rpm and in open drive 250 to 700 rpm.
The 3% nickel-chrome steel main spindle ran on taper roller bearings and carried a No. 4 Morse taper nose, into which fitted a 1-inch diameter cutter-holding mandrel. The overarm was a 4-inch diameter steel bar..

Denbigh J.P.V.S. Variable-speed Horizontal Miller.
One of the company's smallest models the J.P.V.S horizontal Denbigh was and fitted exclusively with a lever-operated longitudinal feed to the 19" x 6" table with 8.75 inches of travel. Cross travel was 4.375 inches and 7.5 inches vertically. The drive system was arranged in two stages - first by a two-step pulley from a 1.5 hp 3-phase 960 rpm motor to a countershaft, then by an infinitely-variable speed unit, which used expanding and contracting pulleys, to give a range from 220 to 1600 rpm. Unfortunately the speed-change lever was mounted directly on the end of the variable-speed pulley shaft and, as such, was rather inconveniently placed. The No. 3 Morse taper spindle was in 3% nickel-chrome steel and ran in pre-loaded "double-purpose" (thrust and radial load) ball bearings. The 1-inch diameter cutter-holding mandrel (arbor) was supported by a stout 3-inch diameter overarm. Both a non-quill feed vertical hand and a slotting attachment were available.
The machine weighed just over 1000 lbs and stood 62 inches high.

The usual style of Denbigh drive system with a countershaft in the lower section of the main column and drive to the "double backgear mechanism" by means of an endless chrome-leather faced flat belt 2.5 inches wide. A chain drive, taken from the end of the countershaft, provided  a power feed to the coolant pump, whilst another chain, driven from the end of the main spindle,  was employed to drive the 4-speed table-feed gearbox.

Typical of the Company's products over many decades was a range of bench and floor-standing drills - the 20-inch and 24-inch No. 3 Morse taper type  illustrated here being a model made in very much the same form from the late 1800s until - almost unbelievably - at least the late 1960s