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E Type Junior Horizontal/Vertical Light Vertical VS Major ELT
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A development of the Major, the Senior "V.S." used a wider main column, a stiffer, more robust dovetail-type overarm (in place of the earlier round bar) and had a vertical knee travel some 1.5" greater. It was made in two versions: one with a horizontal spindle (and full backgear like the M1) and the other, a pure vertical version with an S-Type head fastened to the end of the overarm. The S-Type head was originally intended to be used on just the Senior E-Type but so successful was it that Senior begin offering conversion kits to fit virtually all their models. A few examples of the VS were produced with both horizontal and vertical capability, some also being fitted with a swing table and so being a true "Universal" type.
When it was introduced in the early 1950s, the machine's dovetail overarm was recessed into the top of the main column - which allowed the motor to be left in place on top of the machine - while later Mk. 2 models (shown here in the form of the Model ELT) were redesigned to allow the overarm to sit on top of the column. Even so, while the vertical travel remained unchanged the motor had to be shifted to a less convenient position on a hinged plate within the cabinet base.
Measuring 37" x 8" overall, the table had a working surface of 31" x 6.5", a longitudinal travel of 22", a cross travel of 7", a vertical of 13.5" and was driven by the usual Senior method of a 3-speed gearbox powered by a simple but efficient V-belt take-off from the main motor. The maximum distance from the spindle nose to the table was 13.5". Twelve spindle speed were provided: 60, 86, 104, 136, 169, 267, 329, 537, 642, 845, 1050, and 1660 r.p.m from a 2 hp 3-phase motor - the slower six speeds being driven through a most useful, torque-increasing lathe-like "backgear" assembly built into the main column that allowed really heavy-duty horizontal milling to be undertaken. A full electrical system was fitted, with overload and no-volt release, together with a mechanically driven suds pump. A "Universal" model - with swing table - was also produced in both Mk. 1 and Mk. 2 versions and these are illustrated below. All accessories designed for the M1 and Major also fitted the "V.S.".