11
96-0112 Rev W
July 2010
Reinstallation / Alignment
1. Stone and clean the riser block. Clean the cross slide.Align the riser block
(20-3525A) with the edge of the cross slide on the tailstock side and secure
loosely with five bolts. Snug one corner bolt to allow it to act as a pivot during
alignment. The riser block will overlap the front of the cross slide table by a
small amount.
Riser Block Alignment Turret Alignment
2. Make sure the dowel holes on both the riser block and the turret are clean.
Insert two brass dowel pins into the riser. Line up the pins with the holes on the
bottom of the turret and install, being careful not to damage anything. Bolt the
turret to the riser block and snug the bolts.
3. Place an indicator tip against the face of the turret. Jog the X-Axis and check
for parallelism between the spindle casting and turret face. Tap the riser block
to correct any misalignment, within .001”. Temporarily connect air (set to 80 psi)
and power. Rotate the turret 90 degrees and recheck turret face flatness, within
.001”. When alignment is confirmed, tighten the accessible riser block bolts
with the turret still installed, then lift the turret and tighten all riser block bolts to
90 ft-lbs. Reinstall the turret (with the original shims in place, if available) and
reverify alignment before proceeding. Disconnect air and power.
4. Check turret height by setting up boring bar holders and appropriate diam-
eter bars in positions 1 (toward machine front) and 4 (toward machine rear)
of the turret. The bars should extend 2” from the holders. Place the tip of the
indicator on top of the bar in position 1 and jog the Z-axis along the bar. The
deviation can be no more than .001” over the 2” travel. Move the X-axis until
the bar is in line (centered) with the spindle. Measure the height difference
between the bar and spindle. The two surfaces must be parallel within .001”.
Rotate position 4 to the front and repeat measurements. Use .001” horseshoe
shims to raise the turret as necessary to align. Trim the tabs from the shims
flush with the spacer/turret assembly. When alignment is complete, tighten the
turret bolts to 90 ft-lbs.
5. Change Setting 113 to “Auto”.
