Almost identical, apart from the head assembly, to the Riva U.6  and O.6 Universal and Horizontal types, the V6 was one of a limited range of vertical millers produced by the Company. Built as both a standard model and as the V.6.C with 3-dimensional hydraulic copying, some confusion exists as to the precise dimensions of the tables fitted. However, the hydraulic-copy model of the late 1960s had one 1200 x 300 mm and the standard version 1100 x 270 mm with three 16 mm T-slots on 60 mm spacing and with longitudinal, traverse and vertical movements of 900, 300 and 500 respectively - figures rather more generous than the equivalent horizontal models. Because the table was comparatively long, in order that the operator could stand and observe the cut, the table's longitudinal feed handle was set not at the end, but to the right of the knee where it protruded, at an angle, from the table-support casting.
Twelve rates of feed were provided, driven from an extension to the spindle motor, of 13 to 625 mm/min in both directions horizontally (with rapids at 2000 mm/min) and from 5 to 250 mm/min vertically (rapids 1000 mm/min). The revised machines had both horizontal feed rates set at 12 to 650 mm/min and 6 to 300 mm/min vertically with rapids of 2500 mm/min and 1250 mm/min respectively. The whole of the feed gearbox and multi-plate clutch assembly was built into one casing and lubricated by an oil bath and a pumped supply through a distribution tube (the machine had two mechanical, plunger-type oil pumps fitted, one for the spindle gearbox and another for the feeds with a third hand-operated one, located in the saddle, to distribute oil to the table and knee ways). Although earlier models are thought to have had plain steel table feed-screws, later had ones were hardened with ground threads; though their micrometer dials were on the small side, they were clearly engraved and given a non-reflective, matt chrome finish.
Fitted, on the first versions, with an ISA 44/45 taper, the vertical head had 12 speeds from 30 to 1500 r.p.m. driven by a 4 h.p. motor held in the bottom of the main column. The drive passed upwards by three V-belts to a speed-change gearbox driving a horizontal spindle. On the outer end of the drive shaft was a pair of Gleeson ground, oil-bath bevel gears used to transmit the drive to the vertical head. Able to be pivoted 90° each way from upright, the head tilt was by a handwheel working through helical gear and worm-and-wheel gearing. Revolving in adjustable taper roller bearings, the hardened chrome-nickel spindle was fitted with a dynamically-balanced and externally-mounted flywheel - the better, claimed the makers, to cope with the use of large diameter cutters. Only a fine-feed handwheel was fitted to move the spindle, there being no quick-action, lever-feed mechanism for drilling.
A number of ingenious accessories were offered for the V6, most centred around attachments carried on the end of the vertical head. Perhaps the most useful was a unit to extend the throat from 375 to 525 mm - the Vertical Head Extended Projection: this unit consisted of a small right-angle gearbox that clamped around the end of the spindle flange with sets of bevel gears to turn the drive through two right-angles. To add to its usefulness', the assembly could be rotated in each plane through a full 360°. Also clamped on was the Coxial High-speed Head, a device driven by it's own 2-speed, 0.4/0.6 h.p. motor that gave speeds from 2500 to 5000 r.p.m. motor. Obviously intended only for delicate work using very small cutters, this device allowed the miller to be used for such jobs as die sinking and pattern cutting. For further work on dies, the makers offered the 100 mm stroke Inclinable Slotting Attachment.  This used a right-angle gearbox driven directly from the main spindle set on its lowest speed. Horizontal milling was cater for by the Horizontal Milling Attachment, a bevel-gear driven accessory carried on the spindle end. A most unusual addition was offered for this unit - a second parallel spindle that bolted to the underside and allowed milling cutters of up to 50 mm diameter to be mounted - the device being intended to mill racks and slots..

A useful accessory: Vertical Head Extended Projection. This extended 375 to 525 mm - and consisted of a small right-angle gearbox that clamped around the end of the spindle flange with sets of bevel gears to turn the drive through two right-angles. To add to its usefulness', the assembly could be rotated in each plane through a full 360°

Coxial High-speed Head: an accessory driven by it's own 2-speed, 0.4/0.6 h.p. motor that gave speeds from 2500 to 5000 r.p.m. motor. Obviously intended only for delicate work using very small cutters, this device allowed the miller to be used for such jobs as die sinking and pattern cutting.

Horizontal milling was cater for by the Horizontal Milling Attachment, a bevel-gear driven accessory carried on the spindle end. A most unusual addition was offered for this unit - a second parallel spindle that bolted to the underside and allowed milling cutters of up to 50 mm diameter to be mounted - the device being intended to mill racks and slots.