96-8100 1-15-96
88
MECHANICAL SERVICE
HAAS AUTOMATION, INC.
SERVICE
MANUAL
VF-SERIES
...push back into the machine, then pull out forward.
10. Carefully pull the lead screw forward, to the right of the support bearing, under the front way cover until
the rear of the lead screw clears the nut housing. Shift the rear end of the lead screw to the right side of the
nut housing and move the lead screw to the rear of the machine until it clears the front way cover. Remove lead screw
from the machine.
INSTALLATION -
1. Ensure all mating surfaces on the bearing sleeve, motor housing, nut housing, and ball nut are free of dirt, burrs,
grease, or other contaminants.
CAUTION! MATING SURFACES MUST BE CLEAN OR MISALIGNMENT MAY OCCUR, SERIOUSLY AFFECTING THE
PROPER OPERATION OF THE MACHINE.
2. Slide the motor end of the lead screw under the saddle, taking care not to damage the screw threads. Position the
lead screw to the right side of the nut housing and slide toward the rear of the machine as far as it will go.
3. Pull the lead screw forward until it is against the front way covers. Place the motor end of the lead screw through the
nut housing and push the lead screw toward the back of the machine until the ball nut is seated in the nut housing.
4. Place the bearing sleeve in the motor housing. It may be necessary to align the bearings in the sleeve to facilitate
mounting on the lead screw.
5. Screw the clamp nut on the motor end of the lead screw two or three turns. Do not tighten.
6. Pull the lead screw through the lead screw support bearing and loosely install the clamp nut as on the opposite end.
NOTE: DO NOT SKIP STEPS 7-10. THESE STEPS ENSURE THE LEAD SCREW IS INSTALLED AND RUNS PARALLEL
AND FLAT TO THE LINEAR GUIDES AND THE SADDLE.
7. Install and tighten the six ¼-20 x 1" SHCS on the bearing sleeve. (Place a drop of blue Loctite® on each of the SHCS
before inserting.) Tighten down completely.
8. Hand-turn the lead screw until the table is as far forward as possible while still allowing room to install the SHCS on
the ball nut.
9. Install the two outer SHCS of the six ¼-20 x 1" (or ¾") SHCS that secure the ball nut to the nut housing. (Place a drop
of blue Loctite® on each of the SHCS before inserting.) Tighten down completely.
10. Loosen all of the SHCS on the bearing sleeve approximately ¼ turn, but do not remove.
11. Hand-turn the lead screw until it is at the rear of its travel. Retighten all six of the SHCS on the bearing sleeve.
12. Install and tighten down the four remaining ¼-20 x 1" (or ¾") SHCS that secure the ball nut to the nut housing.
(Place a drop of blue Loctite® on each of the SHCS before inserting.) Tighten down completely.
13. Reinstall the hard stop on the lead screw support bearing.
14. Tighten the lead screw against the clamp nut as follows:
Ø Tighten the clamp nut on the motor housing end of the lead screw to 15 foot-pounds.
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