Johnford SV-48H

Johnford builds the SV-48H for shops that want a 50-taper spindle over a mid-size table without moving to a bridge machine. It has a BT/CAT-50 spindle at 60~6,000 rpm, travels of 1,220 x 710 x 630 mm (48 x 28 x 24.8 in) and a 1,300 x 700 mm (51.2 x 27.6 in) table rated for 1,500 kg (3,300 lb).

Consider what a face mill needs. A cutter of 125 mm (5 in) must be able to run off both ends of the part and step over across its width, so usable part size is always smaller than the travels. On the SV-48H the 710 mm of Y and the 740 mm (29.1 in) from spindle to column leave room for that on a plate or housing of real size. On the SV-33H and SV-41H, with 610 mm (24 in) of Y, the same cutter covers less.

The drive is the series' H-model unit: 11 / 15 kW (14.8 / 20.1 hp) through a Hi-Lo gear. Johnford's option column offers 8,000 or 10,000 rpm cartridge spindles and motors larger than 11 / 15 kW with the gearbox, so the machine can be biased further toward speed or toward torque at order. Axes rapid at 24 / 24 / 24 m/min (945 / 945 / 945 ipm) and feed at up to 12,000 mm/min.

Standard tool storage is a 20-tool armless changer; the option list includes arm type magazines of 24, 32, 40 and 60 tools. Tools may weigh 15 kg (33 lb) and reach 400 mm (15.7 in). The machine weighs 7,500 kg (16,500 lb) and occupies 3,200 x 3,900 x 3,090 mm (126 x 154 x 122 in), the same outline as the 40-taper SV-48.