Logan 915 Instractions Download | Manualshive

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Summary of Contents for 915

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Page 2: ...REVERSING SWITCH HEADSTOCK I FIGURE 1 LOGAN NO 920 FLOOR MODEL 11 SWING QUICK CHANGE GEAR LATHE 2 ...

Page 3: ...ot its weight will cause the lathe bed to be twisted throwing the lathe out of true It is impossible to do ac curate work on a lathe that is not level and the lathe will be damaged beyond repair When the lathe is in position place a sensitive machin ist s level on top of the lathe bed and adjust any varia tion from level by placing thin shims under the feet Be certain the lathe is level across the...

Page 4: ...creases the belt tension to the left decreases it The Countershaft The countershaft assembly of the Logan Lathe is a patented development that is a distinct improvement over previous design This special unit assembly is carried by two hinged pins attached to a bracket in the headstock and by a pedestal to the floor or the bench giving three point suspension To prevent vibration being transmitted t...

Page 5: ... should be followed_ First remove the take up nut the spindle gear Wood 5 ruff key collar and bearing grease seal in the order named from the left hand end of the spindle Second remove the four fillister head screws from the bearing cap then the bearing cap and next the grease seal from the right hand end of the spindle Third loosen the set screws in the bull gear and care fully drive the spindle ...

Page 6: ...0 1500 6 The Lathe Bed The bed of the Logan Lathe is an extra heavy one piece casting Df hard iron containing the correct proportion of steel and alloys to give the maximum in wear and to withstand all strains Extra width 6 15 16 across SET OYER SCREWS FIGURE 6 LATHE BED AND TAILSTOCK the ways extra heavy walls heavier and closer spaced box type cross ribs combine to give greater strength and a mo...

Page 7: ... 224 per inch inclusive the change gear train is set up as in Fig 8 using the 24 tooth stud gear A 48 tooth gear is mounted as a spacer on the idler gear but serves no active purpose For threads from 4 to 7 per inch the 48 tooth gear is mounted in the stud gear position and the 24 tooth gear is mounted as a spacer on the idler gear FIGURE 8 CHANGE GEAR TRAIN ON LOGAN QUICK CHANGE GEAR LATHE All ot...

Page 8: ...The tailstock may be set over 11 16 inch for turning tapers by loosening the tailstock clamp nut and adjust ing the headless set screws located on either side To align the tailstock again the index line on the tail stock and tailstock base will indicate the approximate posi ion To obtain the exact position it is necessary to place a 12 or 15 inch check bar between centers Take a light cut then che...

Page 9: ...eed is operated by a hand wheel at the end of the cross feed slide This slide is equipped with a gib which may be tightened by adjustment of the set screws on the outside of the slide The cross feed gib should fit snugly and should be a djusted whenever play develops The cross slide is moved by a n Acme threaded screw mounted in self lubricating bronze bearings The hand wheel of the cross feed is ...

Page 10: ... set screw on the 3econd step of the pulley and oil freely before using the back gears 8 Remove set screw and fill this oil well so that when petcock set screw 9 is removed oil just drips out 10 Keep the following surfaces clean free of chips and covered with a film of oil The lead screw The cross slide The compound slide The lathe bed ways both V and flat The outside of the tailstock ram Spindle ...

Page 11: ...e joined by either gut or rawhide throngs as follows When the belting has been cut to the desired length square the ends and punch ten holes as shown in Figure 13 Start the lace through holes A and B pulling both ends through working one to the right and one to the left as shown Do not cross one layer of lacing over another on the pulley side and do not allow it to kink or turn or the belt will no...

Page 12: ...________ _18 o Side Clearance Angle 8 Lip Angle 64 o Back Rake Angle __________ 16 1 0 Front Clearance Angle 7 Side Rake Angle _ _18 o Side Clearance Angle 8 Lip Angle ___64 Back Rake Angle __________16 1 2 Front Clearance Angle 7 Side Rake Angle _18 Side Clearance Angle 8 Lip Angle 64 Back Rake Angle __________ 16 12 o Front Clearance Angle _ 7 Side Rake Angle oo Side C earance Angle ___ 8 Lipe A...

Page 13: ...peed steel and also holds the bit at an angle 13 This angle directs a large portion of the cutting pressure directly toward the base of the tool post When using the tool holder the cutting end of the bit should be clamped as close to the end of the holder as possible and the bit holding end of the holder should be as close to the tool post as possible This will give the cutting edge rigid support ...

Page 14: ... tailstock ram is then advanced moving the work into the drill as shown in Figure 20 If this method is not used the center holes may be drilled by placing the work in a drill press or the work may be held in a universal three jaw scroll chuck and the countersink drill held in the tailstock in a drill chuck When this method is used the end of the shaft should be faced smooth before drilling the cen...

Page 15: ...ly accurate to 003 when new If greater accuracy than this is re quired the jaws may be shimmed as needed The jaws of the 4 jaw chuck are reversible while an additional set of jaws are supplied with the 3 jaw chuck for internal chucking in which case the jaws are placed inside the work and the outside turned DRILL CHUCKS Fig 23A are used both on the tailstock of a lathe with the work turning and on...

Page 16: ... mandrel In driving the mandrel out of the work do not use a steel hammer without protecting the end of the MANDREL MOUNTING mandrel from damage Make sure that mandrel is Hollow pieces may be mounted on a mandrel and the driven off in the opposite direction than that from which mandrel mounted between centers allowing the entire it entered the work Te1 minol Box i l T2 f yc2 Cl rJ T4 I I Ll L2 Ter...

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