Southbend SB1001 - Manual (Page 47)

For Machines Mfg. Since 8/11 Model SB1001 8K ™ Lathe
-45-
O P E R A T I O N
Changing Feed Direction
The position of the feed direction gears controls
the rotation of the longitudinal leadscrew as
follows:
• Standard: Leadscrew rotates in the same
direction as the spindle.
• Reverse: Leadscrew rotates in the opposite
direction as the spindle.
• Neutral: Leadscrew and end pulleys are
disengaged from the drive train. This
configuration can be used to save wear on
the end pulleys and timing belts when tool
position is manually controlled.
Tool Needed Qty
Wrench 13mm .......................................................1
To change the position of the feed direction
gears:
1. DISCONNECT LATHE FROM POWER!
2. Open the end cover and loosen the pivot lock
bolt.
4. Reverse: To make the leadscrew and spindle
rotate in opposite directions, turn the spindle
counterclockwise by hand as you apply
pressure on the pivot bracket toward the
back of the lathe until the front direction
gear meshes with the spindle shaft (see
Figure 70).
5. Neutral: To disengage the leadscrew and end
pulleys from the drive train:
a. Back out the tensioning thumb screw
(see Figure 71) all the way, then push
the top end pulley toward the back of
the lathe to release the tension on the
attached timing belt.
Figure 70. Feed direction gears in the left-hand
threading position.
Feed Direction
Gears in Reverse
Position
3. Standard: To make the leadscrew and
spindle rotate in the same direction, turn
the spindle clockwise by hand as you apply
pressure on the pivot bracket toward the
front of the lathe until the rear direction
gear meshes with the spindle shaft gear (see
Figure 69).
Figure 69. Feed direction gears in the right-hand
threading position (belts and pulleys removed for
photo clarity).
Feed Direction
Gears in Normal
Position
Pivot
Bracket
Pivot Lock Bolt
Spindle Shaft
Gear
b. Turn the spindle counterclockwise by
hand and apply pressure on the pivot
bracket toward the front of the lathe
until the front direction gear is resting
on the timing belt (see Figure 71).
6. Re-tighten the pivot lock bolt and close the
end cover.
Figure 71. Feed direction gears in the neutral position.
Tensioning Thumb Screw
Push
Here
Direction
Feed Gears