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6 to 12 hour delivery
36 month warranty
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Air chucks
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Any make, model or size
1 to 3 day delivery
48 month warranty
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Up to 40' long
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When your ball screw is
worn, the ball grooves are not perfectly round any more. Putting in
new balls (perfect spheres) into a worn ball
groove isn't going to be a long term solution to your problem. The new balls will start to wear out
unevenly and cause your screw more damage the next time it fails.
Re-balling a screw is just a temporary fix that is only good for a
few months.
We grind the ball
grooves of your screw to a T.I.R. of +/- .0002 per linear foot. We
then grind the ball grooves on your nut to the same diameter (+/-
.0002). Precision ground & lapped balls are installed. Screw, nut &
balls are lapped together at high speed for 30 to 45 minutes.
This will insure
that the proper load is evenly distributed throughout the entire
length of your screw.
This is how a new ball
screw is manufactured & tested. This is how your ball screw is
rebuilt by Mitchell Precision. This is why we are the only company
offering a three year in use warranty on all ball screw repair
projects.
Precision ball screw
repair backed by our industry leading 36 month warranty!
Your ball
screw will perform like new for three years, guaranteed. When we
repair your ball screw we're returning it to original manufacturers
specifications & tolerances.
We're capable of holding .0001" per linear foot lead accuracy. We can
also grind, chrome plate & grind your bearing ends if they're worn
and even repair the journal if it's broken off.
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All rebuild
shops are NOT the same.
Simply "re-balling" a screw will work for a few months. If
you want your ball screw to last a few years, then you need
to do a complete rebuild with Mitchell Precision as follows: |
1: Check the load of the nut throughout the entire length of
the screw locating any trouble spots
2: Complete disassembly of the screw, nut & returns to prep
with steam cleaning for inspection
3: Check & record ball groove depth on both screw & nut.
Record ball size. Prep for grinding.
4: Inspect all return tubes, return mechanisms, wipers,
brushes and repair/replace as needed
5: Thread grind (ball grooves) your screw end to end until a TIR of .0002" (per foot) is reached
6: ID grind the nut to the same diameter ball grooves within
+/- .0002 over entire length of nut
7: Precision grind & lap balls to size matching the newly
ground ball grooves on your screw & nut
8: Assemble all parts with lapping compound and run the
screw at high speed for 30/45 minutes
9: If there are any tight spots or trouble areas, we start
again at line #4
10: Disassemble screw & nut for cleaning / inspection and
make adjustments as needed
11: Final assembly to original preload, complete inspection,
testing & crating
12: If bearing surfaces or journals are damaged, we can OD
grind & chrome back to OEM specs |
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The end result
is a completely remanufactured ball screw that will last
years instead of months. We completely remanufacture your
ball screw, not just reload it. If other companies offered
the same level of service, they'd offer the same warranty. |
Ball
Screw Repair
Tsubaki
Machine Tools
SKF
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Screw Service
NSK
Bosch Rexroth /Star
Summit Machine
Motion Industries
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Ball Screw
American Machine
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Toyoda USA
Fadal
Haas
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Precision Ball Screw
Okuma
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