Having used a UMA horizontal borer for much of his daily work, a Berlin-based engineer found that he missed it useful versatility and easy adaptability to machine complex components - especially the built-in rotary table.
Looking in a Schuchardt & Schütte catalogue for 1921 he came across a Lucas borer with a bed that reminded him of an old gear measuring machine he had saved from the scrapyard some twenty years earlier.
So, the idea was born to build a 1/5th scale replica of the Lucas using the bed element of the gear machine. The columns for headstock and tailstock were cast locally using patterns made by an elderly joiner with other parts machined from the solid.
Working only from the brochure pictures, the machine took two years to complete and is now, at the end of 2011, almost functional. To improve usability two main alterations were made: instead of the original spindle drive (through a gearbox) the builder used belt drive to obtain the higher speeds necessary with the smaller scale and, to improve rigidity, did not fit the horizontal spindle feed.
350 x 180 mm, the table has 175 mm of cross movement and 250 mm longitudinally with the headstock and tailstock and spindle housing able to move through some 220 mm up and down. An automatic feed is provided on all three axes, in all directions, by a 3-speed gearbox taken from a lathe. However, the table runs through its maximum travel only towards the spindle, this being the direction in which an automatic stop is fitted. To bring the speed down from the electric motor a pair of worm gears are employed that give a combined reduction ratio of 90 : 1 (the reverse gears for the up and down movement are also in the same gearbox, at the right-hand end of the machine, while those for the table reverse  are enclosed under a hump in the back of the table end plate).
In order to remove backlash from the spindle head, the original Lucas employed a heavy counterweight that hung on a chin down the back of the head-support column. As the replica required this position for the drive system, the chain was arranged to pull against a long spring.
The drive system is set to give six spindle speeds over two belt drives tensioned by an eccentric bearing holder. The main spindle has a No. 3 Morse taper  nose with the usual slot provided to allow the insertion of a wedge.
Held down by just two bolts, the rotary table can be quickly removed and replaced.