The Lorch Precision Toolmaker's Lathes AVI-K and AVII-K were distinguished only by the size of their collet capacity - 20 mm diameter shanks in the case of the former, and 30 mm for the latter. The centre height was 100 mm with, in the case of the standard bed-length machines, a between-centres capacity of 800 mm. The spindle bore of the AVI-K was 19 mm and that of the AVII-K 20.6 mm
Both lathes were available for bench or stand mounting  - or as special short-bed production types with chase screwcutting, bed-mounted capstan units and lever-operated collet closers.
A range of motors was offered with the three standard examples (all of which could be ordered with two or three speeds) being rated at 2800, 1400 and 700 rpm - these gave 6 spindle speeds ranging, respectively, from: 530 to 3000 rpm, 265 - 1500 rpm and 132 to 750 rpm. A turning accuracy of 0.00012" (0.003 mm) was claimed.

Special short-bed version mounted on the Underdrive cabinet No. 38t with the optional foot brake No. 92 (not shown). The lathe is equipped with the capstan head No. 24a, thread-chasing device No. 85 - and a standard fit lever-action collet closer.