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GENERAL DESCRIPTION.

 Bed design of deep cross section for rigidity, is cast in high duty alloy cast iron and has flame hadened precision ground ways.

 All parts subject to wear are hardened and ground, ball and roller bearings are fitted through out.

 Headstock spindle is carried by two angular contact ball bearings and one double row journal bearing, each separately housed in oil bath. Nose bearings are of ample load capacity and accurately pre-loaded to precise float. Lubrication on remainder of headstock is by splash feed in the main chamber.

 Spindle register for chucks etc. is of conical form, attachments being secured by three quick release cams of positive action.

 Twelve spindle speeds are provided, of range 25 to 1645 R.P.M Transmission is mechanical, and gear selection is by a dual range dial in conjuction with a fast and slow lever. Drive gears are oil immersed and controlled by a dry flat plate friction clutch through a lever mounted close to the headstock.

 Totally enclosed auto-lock feed gear box of unique design, is oil immersed. Threads and feeds are given on a large easily read dial, and changes are rapidly effected by the turn of a knob. The high precision leadscrew is carried by three ball races; two angular contacts for adjustable thrust, and one self aligning. The conventional chasing dial and nut release is incorporated with automatic interlock of thread or feeding motions and in addition the leadscrew may be dis-engaged or reversed by a knob operated single dog clutch, at the headstock. a range of 82 threads can be cut, from 3 - 92 T.P.I and .25 - .4 mm pitch.

 Saddle ways of extra length are automatically pressure lubricated, the volume of oil delivered being in direct proportion to duration of travel. Vertical support is given by four adjustable ball races.

 Cross-slide screw is totaly enclosed, pressure lubricated, and has adjustable split nut. A unique easy set stop facilitates thread or groove cutting. A large dial is fitted, graduated in thousandths of diameter turned.

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