Oneway bed construction. The large-diameter tube carries welded-on brackets supporting the machined ways.

The end of the bed tube (this is a Model 1018) is bracket to both the bench and welded to the ends of the flat ways.

     The headstock assembly of the "Large" lathe is also built up from a tube - welded to a stiff rectangular support - and its spindle manufactured from a high-tensile steel hardened and finish ground all over. The nose is a M33 by 3.5 mm pitch thread which incorporates a locking arrangement to allow full-speed reverse with safety; the end flange of the Poly-V pulley is provided as standard with 6 holes for the locking plunger to engage with and an additional ring of 48 (optionally 96) holes for indexing work. The spindle runs in four bearings - a pair of sealed-for-life, deep-groove, pre-loaded ball bearing immediately behind the nose and a pair of "floating" ball races at the other end - and is driven directly from a high-quality, electronically speed-controlled motor (with a choice of 1.5, 2 and 3 hp) mounted directly beneath the headstock in the base of the stand. A 3-step, 10-groove poly-V pulley is provided to give three speed ranges: 0 to 800 rpm, 0 to 1800 rpm and 0 to 3000 rpm. To assist in changing the belt from pulley to pulley a section of the headstock is cut away at the top and provided with a heavy drop-in cover. Interestingly, the control box for the motor is mounted on a two-part arm pivoted from a bracket beneath the bed; it can thus be swung into any position, either in front of or behind the bed, which takes the operator's fancy.
The tailstock of the "Large" is of fabricated construction and has a generously-proportioned 1.5" diameter quill (barrel) with a useful No. 3 Morse taper and 4 inches of travel. The assembly is fitted with an extra-long clamping handle and a robust bed clamp - whilst a welded-on "lifting" handle assists with its safe removal and replacement. 
     The "Large" lathes really are just that - with tremendous physical presence, considerable weight and as much capacity as even the most experienced and enthusiastic amateur turner could possibly handle with safety; however, even though the lightest weighs 600 lbs (5.4 cwt or 272 Kg) and the heaviest 850 lbs (8.5 cwt or 386 Kg) the overall lengths are not excessive; the shortest model, the 2016 is just 40 inches long whilst the biggest, the 2436, takes up 60 inches. Prices are, however, are another matter, and the maxim of you-get-what-you-pay-for applies very strongly; these are not cheap machines built down to a price for the casual user but a quality product for the serious enthusiast and professional.
     The "Mini" lathe has exactly the same type of headstock construction as the "Large" but with a smaller, 1 5/8" diameter No. 2 Morse taper headstock spindle with 1" x 8 tpi thread; the entire spindle is hardened and ground and runs in exactly the same type of high-quality bearing arrangement as its larger brothers. In order to obtain a top speed of 4000 rpm the drive arrangement includes both a continuously variable-speed, inverter-controlled 3-phase motor of 0.5 or 1 hp (the supply required being either 110 or 220 volts, 1-phase, respectively) and a countershaft (jack-shaft) unit with three Poly-V pulley carrying inch-wide, 6-groove belts mounted on the headstock-end bed plate immediately below the spindle. The three speed ranges cover: 0 to 1000, 0 to 2000 and 0 to 4000 rpm; because the drive system is biased towards a high top speed - this is, after all, a lathe which will be doing smaller work which requiring high speeds for a good finish - the continuous slow-running speed is limited to not less than 150 rpm. Unlike the larger lathe, the tailstock of the 1018 "Mini" lathe is of traditional cast-iron construction with a smaller 1.125" diameter barrel but still with a still-adequate No. 2 Morse taper - and 3 inches of travel. The least satisfactory element in the lathe's design can be found in the tailstock spindle clamp - a crude, screw-down affair of the type which should only be employed on the cheapest of machines.
      The bed and ways of the 1018 are identical in arrangement to those of the "Large" lathes, but based on a much smaller 4.5" diameter tube with a wall thickness of 0.25".
The Oneway web site is at: http://www.oneway.on.ca

Left and below: at the headstock-end of the 1018 the end support plate acts as a bracket to carry the 3-speed countershaft unit. As both motor and countershaft are fitted to pivoting brackets, both belts can be individually tensioned.
A swing-open cover secured by a magnetic catch guards the mechanism.

A countershaft (jack-shaft) unit with three Poly-V pulleys carrying inch-wide, 6-groove belts is mounted on the headstock-end bed plate. The three speed ranges cover: 0 to 1000, 0 to 2000 and 0 to 4000 rpm.