Jet BD-11G, Operating Manual, Page: 26 / 48

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Unplug the shockproof plug from the mains.
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Unscrew the two fastening screws.
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Remove the protective cover.
5.6.2 Changing the speed range
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Loosen the nut on the tension pulley holder and release the tension of the V-belt.
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Lift the V-belt into the corresponding position.
O Depending on the speed selected, the V-belt will have to be lifted directly onto the motor pulley or onto the
pulley of the primary transmission. Two V-belts of different lengths have therefore been provided for the BD-11
lathe.
O Handle the V-belt with care. It must not be damaged or overstretched.
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Tighten the tension pulley and fasten the nut again.
O The correct tension of the synchronous belt has been reached when you can still bend it approximately
3 mm with your index finger.
ATTENTION!
Make sure the tension pulley is in contact with the outside of the V-belt at all times!
Make sure the tension of the V-belt is correct. Excessive or insufficient tension can cause damage.
5.6.3 Speed table BD-11
5.7 Adjusting the feed
5.7.1 Selector switch
Use the selector switches to select the feed direction and feed speed.
ATTENTION!
Wait until the machine has come to a complete halt before making any change to the selector switches.
INFORMATION
Use the table on the lathe for selecting the feed speed or the thread pitch. Change the change gears
if the required thread pitch cannot be obtained with the installed gear set.
5.7.2 Changing the change gears
The change gears for the feed are mounted on a quadrant.
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Unplug the shockproof plug from the mains.
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Loosen the locking screw on the quad- rant.
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Swing the quadrant to the right.
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Unscrew the bolt from the lead screw or the nuts from the quadrant bolts in order to remove the change gears
from the front.
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Install the gear couples using the feed or change gear table and screw the gearwheels onto the quadrant again.
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Swing the quadrant to the left until the gearwheels have engaged again.
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Readjust gear flank clearance by inserting a normal sheet of paper as an adjusting or dis- tance aid between the
gearwheels.