Hendey 24-inch Geared-head lathe
The spindle had nine speeds - typically from 10 to 320 rpm - three through gearing carried on the spindle, and six through double back gears.
The 1.75-inch bore spindle, threaded 4-inch x 3 t.p.i, was manufactured from a high-carbon, hammered steel forging, and finished to what was described as "scleroscope-hardness". The spindle was bored for a No. 6 Morse taper sleeve, and normally ran with a No. 5 Morse centre in place.
The spindle ran in tapered, plain bearings, each lubricated with a "ring oiler", and with its own adjustment to minimise the effects of contraction and expansion as the work load varied throughout the day - yet without disturbing the running adjustment.
The spindle end thrust was taken on the face of front bearing through a hardened and ground steel collar interposed between face of hearing and spindle collar; once the end-thrust adjustment had been made it should have remained constant over a long period of service - any wear in the taper bearings and spindle being adjustable by a simple resetting of a collar nut. The headstock was lubricated by the simple means of the lower gears dipping into the oil, and flinging it around inside the casing. A simple friction clutch was fitted to the headstock drive, controlled by two levers, one directly below the headstock the other carried on the bottom of apron.
Able to generate 36 different English threads and feeds the screwcutting gearbox was available with extra gears available to cut metric and other threads not listed on the plate. An automatic stop was fitted - which worked in both directions for both screwcutting and feeds - this was a feature of all later Hendey lathes - but one which the handbook cautioned against using (on these early models) at higher speeds..