The Kerry Type 'BD' lathe was listed alongside the geared-head Type 'AG' for the first few years of the 1950s. In what must have been an attempt to offer a more reasonably-priced machine the 'BD' was belt driven and offered only with changewheels for screwcutting, there being no option of a quick-change gearbox. Despite the lower price (through few can have been sold: it is extremely rare on the second-hand market) the lathe was still heavily built and used an 8-inch wide V-and-flat bed of massive proportions with heavy cross bracing. Two bed lengths were available: 48-inches and 65-inches that gave, respectively, 221/2 and 391/2-inches between centres. The capacity of the bed's gap - 17'' by 31/2'' - was reasonable for the lathe's size but offered only on the longer-bed version.
The headstock was also a heavy casting with its high-tensile, nickel chrome 1-inch bore, 4-Morse taper spindle running in a pair of Timken taper roller bearings. The backgear assembly was arranged to work through a single lever on the front of the headstock that engaged and disengaged the bull wheel from the 3-step V-pulley and simultaneously slid the gears into and out of mesh. Fastened to the back of the bed, behind the headstock, was a pair of cast-iron plates mounted back-to-back and joined on a common hinge; the lower plate carried a 0.5-hp 3-phase motor and the upper a simple but rugged countershaft unit. To tension the primary belt a hand-screw forced the plates apart whilst the secondary belt (with a need to be slackened quickly for speed changes) was tightened and released by a quick-action, over-centre lever acting through a rod connected to a boss on the top plate. 
The combination of a 2-step V-belt drive from the 1500 rpm motor and a 3-step headstock pulley (with backgear) gave a total of 12 speeds: 30, 40, 54, 73, 97, 131, 180, 242, 323, 438, 582 and 786 rpm. It was also possible to specify a 3000-rpm motor and thus still have a reasonably slow bottom speed combined with a rather more useful 15 72 rpm maximum. In line with what had (only just) become sensible common practice in the small-lathe market all belts were guarded on their sides facing the operator.
On the left-hand end of the headstock was an oil-immersed, 3-speed gearbox that gave three rates of sliding and surfacing feed for each setting of the changewheels. Instead of the tumble-reverse assembly being in the usual place immediately below the headstock spindle it was positioned, unusually, on the bracket though which the leadscrew passed.
The leadscrew, grasped by double clasp nuts, was in high-tensile steel and mounted between angular-contact ball races - the one at the headstock end held in a bolt-on housing positioned to shorten the distance between the two supports. Power sliding and surfacing was fitted as standard, the drive being transmitted to the deep, double-wall apron by a slot in the leadscrew turning the usual worm and wheel mechanism. Selection of feeds was by push button and engagement by an easily-moved, flick-up-and-down lever on the face of the apron.
The compound slide rest had a decently large micrometer dial, the option of a T-slotted cross slide and a top slide that could be rotated through 360 degrees.
The tailstock spindle contained a 2-Morse taper spindle engraved with ruler divisions and the top could be off-set on the base for turning shallow tapers.
Although the built-on countershaft allowed the lathe to be offered for bench mounting the makers offered a modern, cleanly-designed sheet-metal stand with a deep drawer in the middle, a generously proportioned storage cabinet on the right and a (rather shallow) welded-on chip tray. The electrical controls were housed in the left-hand cabinet and accessible by just swinging open the door..