Jet BDB-919 Operating Instructions And Parts Manual

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Contents

159.4 Taper turning using tailstock off-setOffsetting the tailstock can turn work to side angleof 5º. The angle depends on the length of theworkpiece.To off-set the tailstock, loosen locking lever (1,Figure 16), then loosen the front adjusting screw (2)and take up the same amount by tightening theopposite rear adjusting screw until the desired taperhas been reached. Tighten the front screw to lockthe tailstock in position. The workpiece must be heldbetween two centers and driven by a faceplate anddriver dog.After taper turning, the tailstock should be returnedto its original position. Turning a test piece withconstant adjustment until the piece is absolutelytrue checks the zero position of the tailstock.9.5 Taper turning by setting the topslideBy angling the top slide, tapers may be turned(Figure 17).Loosen two screws (1, Figure 17); top slide can thenbe rotated. A graduated scale permits accurateadjustment of the top slide. This method can onlybe used for short tapers.9.6 Turning Between CentersFor turning between centers, it is necessary toremove the chuck from the spindle. Fit the MT-3center into the spindle nose and the MT-2 centerinto the tailstock.Mount the workpiece fitted with the driver dogbetween the centers. The driver is driven by a catchplate or face plate (Figure 18).Note: Always use a small amount of grease on thetailstock center to prevent center tip fromoverheating.Figure 16Figure 17Figure 18