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E Type Junior Horizontal/Vertical Light Vertical VS Major ELT
Older Senior Millers
Standing for Extra Long table the Major ELT ( a variant of the dovetail overarm "V.S.") was a top-of-the-range model that included a number of modifications to improve its performance and accuracy. Alterations included an extra long, 37" x 8.5" table with 28" of longitudinal travel, a knee increased in size and rigidity and, at 9", a cross feed some 2" longer than any previous Senior miller.
Instead of a belt drive to table's power-feed gearbox a chain was used, this improving the machine's metal-removing ability when using a slab cutter and the standard-fit, low-speed backgear assembly. A very expensive - and hence rare - version of the ELT was available with a swing table (thus making it a truly "Universal" model and the self-contained, belt-driven "S-Type" vertical head, this being fitted to the end face of the dovetail overarm. The Major ELT is easily recognised in photographs by the "cranked-down" brackets supporting the end of the table's longitudinal feed screw.
Beautifully built, the S-Type head used a 0.5 h.p. motor (1-phase or 3-phase) with drive by a Z-section V-belt to a spindle whose 2.5-inch travel quill was equipped with both fine and quick-action drilling feeds - the former being engaged through a cone clutch, exactly in the manner used on the Centec vertical head.. The spindle ran in precision-class Timken taper roller bearings (with a needle roller bearing at the tail) with early machines having four speeds from 480 to 2760 r.p.m. on a 3-phase supply and from 500 to 2,800 on 1-phase. Later versions had six speeds (though with the same speed range) - or a very effective electronic infinitely-variable speed drive unit. However, the option was available of a slower-running motor - 950 r.p.m. - though few can have been sold. Simple but effective snap-on covers at each side of the head guarded the belt run - though simple the mechanism was far from cheaply constructed, with spring-loaded balls held within bronze housings.