Sealey SM27.V2 Instructions Manual

6.4. Tool PostUp to four tools can be mounted on the tool post. The post can be rotated, in 90° steps,by slackening the locking handle (fig.3.1), and slightly lifting the post. Always ensurethat the locking handle and tool clamp screws (fig.3.2) are tight before starting to cut.The tool post is mounted on the compound slide, which in turn is mounted on the crossslide. The compound slide can be rotated ±60° on the cross slide to permit bevel andtaper cutting. To rotate the compound slide, loosen the two clamp nuts (fig.3.4) androtate the slide to the required angle. Tighten the clamp nuts.The cross slide can be locked in position along the bed by the locking lever (fig.1.8).6.5. ChuckThe chuck is supplied with internal jaws fitted and a set of external jaws. To removeand fit jaws proceed as follows:Using the chuck key, fully wind out the fitted jaws, at which point they can be pulledfrom the chuck.The thread segments on the jaws are staggered and therefore the jaws are numbered1 to 3 (on the inner end of the left location groove) and must be fitted in this sequence,in an anticlockwise direction (facing the chuck).Turn the chuck key anticlockwise while watching the chuck thread in one of the jawslots. When the end of the thread has just cleared the slot, stop turning the key andinsert jaw 1 into this slot. Insert the other two jaws in the other slots in sequence.Hold them under light pressure whilst turning the key clockwise until they are pickedup by the thread and start to move inwards.Check that the three jaws come together correctly at the centre of the chuck. If not,repeat the procedure.6.6. SpeedThe headstock spindle is belt driven and the speed is determined by the beltarrangement. To change the speed proceed as follows:6.6.1. Open the belt cover (fig.1.1).6.6.2. Slacken the motor adjuster nuts and the centre pulley nut (fig.4.A & B).6.6.3. Position the belt(s) to give the required lathe speed, see fig.5.6.6.4. Check that the weight of the motor is tensioning the belt(s) and then tighten the motor adjuster nuts and the centre pulley nut. WARNING! Before starting the lathe always confirm that nothing will contact the chuck by rotating the chuck by hand with thetool post as far to the left as it will be during the turning operation. Make sure that the chuck guard is in place, as shown infig.1.2. The lathe will not operate with the chuck guard raised.6.7. Turning6.7.1. Mount the cutting tool in the tool post such that the tip of the tool is level with, or just below, the lathe centre line. Check this by aligningthe tool tip with the point of the tailstock. The tool tip must not be above the centre line. The height of the tool tip may be adjustedby shimming or grinding the tool.6.7.2. Mount the workpiece in the chuck or on the face plate (optional, see Accessories Section) and, if necessary, support the other endwith the tailstock. A fixed steady and a moving steady are also available, see Accessories Section.6.7.3. Set the speed and forward/reverse switch to suit the job. The leadscrew lever (fig.2.A) should be at position O.6.8. Turning with auto feed6.8.1. Proceed as in 4.7. but in 4.7.3. set the leadscrew lever (fig. 2.A) to I or II. With the gear set as supplied, position I will feed the tool at0.075mm/rev and position II at 0.15mm/rev (see Auto Feed for Turning, fig.7). Ensure that the cross slide lock (fig.1.8) is not applied.6.8.2. Position the tool just to the right of the end of the workpiece and start the lathe.6.8.3. Turn the auto feed lever (fig.2.B) anticlockwise to engage the leadscrew. The tool will now move to the left and begin cutting.6.8.4. Be ready to disengage the leadscrew when the tool reaches the end of the cut. DO NOT allow the tool to over-travel and come intocontact with the chuck.Always be prepared to hit the stop button if the leadscrew cannot be disengaged.6.9. Screw cuttingSimilar to turning with auto feed except that the feed rate is very much faster, demanding increased care from the operator.6.9.1. Select the required leadscrew gear train from the charts (fig.7).6.9.2. Open the headstock end cover (fig.1.1).6.9.3. Remove the gear retaining circlips and nut (fig.6.1, 2 & 3) and slacken the adjuster screw (fig.6.4).6.9.4. Replace the existing gears with those required, in the positions shown in fig.8.6.9.5. Adjust gears B and C, so that the train meshes with minimum backlash but without being tight.6.9.6. Tighten adjuster screw (fig.6.4) and refit the end cover. DO NOT operate the lathe with the end cover open.fig.3Original Language Version SM27.V2 Issue: 2(L) - 06/03/156.1.6. Switch on the lathe by pushing the green switch (fig.1.10).6.1.7. For this initial start-up run the lathe for about five minutes.6.1.8. Switch off the lathe by pressing the red switch (fig.1.11). Disconnect from the mains supply.6.1.9. Check that nothing on the lathe has worked loose and that the mounting bolts are secure.6.2. HeadstockThe headstock spindle has an MT4 taper (internal) for the face plate or a spindle centre(see Accessories Section).6.3. TailstockThe tailstock spindle has an MT3 taper (internal) for a centre or chuck. See AccessoriesSection for the rolling centre and tailstock chuck. The spindle is positioned using the feed handle(fig.1.4) and then locked with the locking handle (fig.1.3).The tailstock base may be moved along the lathe bed as necessary and locked in position bythe locking lever (fig.1.7).fig.2© Jack Sealey Limited

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