....... _ ... ~ I TE E Periodic inspection with adjustment where necessal")'. as given below, will ensure that this lathe retains its original high standard of accuracy and periormance. Release locknut (by turning anti-clockwise, i.e. R.H. thread) and rotate adjusting nut sufficiently to obviate play, then re- tighten locknut. It must be emphasized that this operation requires the utmost care as over-tightening can seriously impair the life of the bearings. Sealing compound should be used when refitting the head- stock cover.
The magnetic plug (chromed head) which is fitted in the headstock cover must be occasionally removed and cleaned of any particles of steel which may have collected there. Always replace the magnetic plug after cleaning. Drive Belts. The drive motor is mounted on a platform inside the cabinet base. Adjustment to the vee belt tension is by a screw at the rear of the machine. Procedure for replacing vee belts is as follows;- Remove the drive guard and inspection cover from end of cabinet base. Release tension in belts by adjusting screw at rear. Replace belts and carefuIIy re-tension. It is important to ensure that the belts do not slip as this would only increase both pulley and belt wear.
Saddle Adjustment. To adjust the rear strip release the four nuts on the underside of the strip, adjust the headless set s.:rews by turning clockwise and re-lock the nuts. To adjust the front strip, release the caphead screw which secures the adjusting screw and rotate the latter anti-clockwise, re-damp the caphead screw. Care should be taken to avoid over adjustment. Clutch. If slip occurs then adjustment is as foHows;- Open the drive guard. Increase the spring load by slightly rotating the nut (anti- clockwise, i.e. left-hand thread) on the end of the dutch shaft.
Constant operation of the dutch results eventually in wear on the driving faces (usually signified by the dutch refusing to drive) and the following adjustment will be necessary. Stop the motor, leaving the dutch in the ON position. Remove the fairing (at the rear of the bed, beneath the headstock). Release the outer nut on the operating linkage one complete turn and re-damp with inner nut. The dutch should be dismantled at six-monthly intervals and any lubricant on the driving faces removed by washing in paraffin. Cross Slide Adjustment. Take up of wear on the taper gib strip is by releasing the locknut, adjusting the screw and re-locking the nut.
The gib strip is of a length to aliow adjustment over a range of wear but after a number of adjustments it may be necessary to shorten the screw. Top Slide. Adjustment to the strip is by releasing the locknuts, ti[htening the screws and re-locking the nuts. E!ectric .. ! Controis. All electrical control equipment is mounted on the panel at the front of the cabinet and if removal is required it is I N.cP ORT ANT to ensure that the isolating switch (line switch) is in the OFF position. The isolating switch (line switch) MUST NOT be removed until the mains leads have been isolated. Headstock Spindle Bearings.
Adjustment for wear on the Timken taper roBer bearings on the main spindle is as follows:- Remove headstock cover. 14