A Multi-purpose Precision Lathe
Page 48
If you've noticed an error in this article please click here to report it so we can fix it.
ALATHE, designed to bridge the gap between the plain precision bench tool and the heavy-duty type, is now in production by Hardinge Machine
Tools, Ltd., Feltham, Middx. Among the features claimed to be exclusive are the solid, hardened-and-ground steel dovetail bed ways; the solid full-bearing carriage; independent variable electric feed for the carriage and cross slide; precision gearbox and lead screw for thread cutting only; and easily read black and white indicating dials.
With the tailstock flush, the distance
The Hardinge lathe has a sw:ng of 11 ins, over the bed. Nominal distance between centres is 18 ins, and, with taihtock overhung, 20 ins. Spindle speeds from 125 r.p.m. to 3,000 r.p.m. can be obtained.
between centres is 18 ins., which is increased to 20 ins, with the tailstock overhung. The swing over the bed is 11 ins., over the carriage, 9 ins., and over the cross slide, 52 ins. The power feed range is from in. to 7 ins, per minute.
The tapered-nose spindle is mounted on preloaded hall bearings, has a 11-in, hole through it, and takes collets for 1-in, round, hexagon and !-in. square material. Spindle speeds from 125 r.p.m. to 3.000 r.p.m. are obtainable, and 27 different thvads can be cut from II t.p.i. to 108 t.p.i.
The lead screw has 8 t.p.i. and is I in. in diameter, Overall dimensions are: Length, 5 ft, 3 ins., width 2 ft. 6 ins. and height 4 ft. 2 ins. The weight is just over 11 cwt..
A representative of "The Commercial Motor" saw the tool reduce a i-in. hexagon bar (free-cutting mild steel) to a diameter of 0.010 in. in one cut without the slightest trace of tool judder.