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Bimba Ultran® Slide Rodless Cylinder
Repair Instructions
CAUTION!
The magnets used in the Ultran product line are of an extremely high
strength and brittle material. Caution should be used in handling these
magnets.
If the magnets are cracked due to impact fractures during the repair
process, they will repel each other and y apart.
During the repair of the product, be sure your ngers do not get between
the piston and the carriage. The magnets on both these parts will attract
each other and could cause injury.
NOTES
Cleanliness of the internal parts is imperative for maximum life of the slide unit.•
Parts that have been repaired should be covered or bagged until needed for •
nished assembly.
Any high grade of bearing grease should be used for lubrication purposes.•
Tools required:
knife or wire cutters
hex driver
arbor press
screwdriver
retaining ring pliers
torque wrench
plastic bags or clean containers to hold parts during the repair
lubricant
NOTE on Arbor Press: Using an arbor press is the safest and preferred way to
perform some of the operations in these instructions. Pressing through the body’s
length is necessary, so the arbor press must have its table a distance from the oor
that is equal to or greater than the stroke of the cylinder. A proper repair is unlikely
if these warnings are not followed.
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SLIDE REPAIR INSTRUCTIONS
Refer to Figure 1 for Steps 1–7
1. Remove air pressure and ttings.
2. Wipe down and clean the unit.
3. Remove the four cap screws that fasten the end
blocks to the guide rods.
4. Remove the end blocks and the guide rods keeping
the carriage, body and piston together as a unit.
5. Remove any grease, dirt or oil from the individual
pieces.
6. Place the carriage, body and piston assembly in
an arbor press. Using a non–magnetic rod or shaft,
press on the piston to uncouple it from the carriage magnets. Do not let the
body slip out of the carriage during this operation.
7. Remove the carriage from the body leaving the piston inside the body. Place
body and piston aside.
Refer to Figure 2 for Steps 8–12
8. Remove retaining ring, wiper holder
and bearing from the center hole on the
carriage. Repeat for both ends.
9. Insert new bearings into both ends.
10. Noting the orientation of the wiper lip,
remove the old wiper from wiper holder
and insert new wipers with the same
orientation.
11. Insert the wiper holder into carriage.
12. Assemble the retaining ring into its
groove in the carriage.
Figure 2:
Figure 1:
Refer to Figure 3 for Steps 13–17
13. Plug the center hole of the carriage (both ends) with a clean rag or cloth to
prevent bearing contamination.
14. Pry out the four guide shaft wipers or press rings (depending on bore size and/
or option) with a screw driver or similar tool.
15. Press out the four guide shaft bearings using care not to disturb the internal
press rings.
16. For the 3/4” thru 2” bore sizes, press in the new guide shaft bearings to the
bottom of the counterbore using an arbor press. For the 5/16” thru 9/16” bore
sizes, press the bearing into the dimension shown in the chart.
17. Press in the new wipers or press rings, depending on bore size and/or options.
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Note: The Ultran guide shaft bearings were upgraded in the second half of
2000. All new repair kits shipped after September 2000 will contain the new
style shaft bearings, which utilize internal press rings. If the Ultran assembly
being repaired does not have internal press rings, be sure to add them before
pressing the bearings in place.
Figure 3:
Refer to Figure 4 for Steps 18–21
18. Remove the piston from the body.
19. Using cutters, cut the seal and pull it out of the groove. Be careful not to scratch
the surfaces of the groove.
20. The new piston bearing conguration is non–repairable. If the Ultran being
repaired has split piston bearings, it should be sent to the factory for new style
piston bearings, or a new piston assembly should be ordered. Contact your
distributor for details.
21. Using the same insertion tool as Step 13, slip the seal into its groove. Be sure
the seal is oriented so the lip faces away from the bearing.
Figure 4:
Figure 5:
Refer to Figure 5 for Step 22
22. Place the piston on top of the carriage and note its position. The ends of the
piston should extend beyond the ends of the carriage equally. If they do not,
turn the piston end for end. This orientation of the piston and carriage must be
maintained for the rest of the assembly.
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Refer to Figure 6 for Steps 23–25
Figure 6:
23. Remove the body O–ring tube seal from the large hole
in both end blocks.
24. Clean the end blocks and the O–ring groove of any grease
or contaminants.
25. Lightly lubricate the new O–rings. Stretch the O–rings
slightly and place them in the grooves by hand.
26. Apply a coating of lubricant to the inside surface of the
tube. Best performance will be achieved when the lubricant is applied evenly over the whole surface.
27. Insert the tube through the center hole in the carriage.
28. Apply a coating of high grade bearing grease to the piston and insert it into
the tube. Use your ngernail to deect the lip of the seal to insert it in the tube.
Again note that the orientation of the piston to the carriage must be maintained
as described previously.
29. Place the assembly back in the arbor press and with the shaft used before,
re–couple the piston with the carriage.
30. Lightly lubricate the four guide rod bearings in the carriage by hand or with a
swab. Insert the two guide rods through the bearings in the carriage.
31. Attach one end block to the guide rods. Insert the tube into the large hole in
the end block. Press rmly on the tube to seat it in the O–ring. Tighten the cap
screws nger tight only.
32. Install the second end block onto the guide rods and tube body. Fasten with
the two cap screws, nger tight.
33. Slide the carriage to one end of its stroke and tighten the cap screws at that
end to the torque specications listed in the chart.
34. Repeat process for opposite end.
Bore Size
007 (8mm) 1.6 (2.17) 09 (27mm) 20.1 (27.25)
01 (12mm) 2.1 (2.85) 12 (32mm) 50.8 (68.9)
02 (14mm) 5.8 (7.86) 17 (38mm) 50.8 (68.9)
04 (18mm) 5.8 (7.86) 31 (50mm) 179 (242.7)
06 (22mm) 12.5 (17)
Bimba Manufacturing Company
Monee, IL 60449-0068
TEL: 708/534-8544 • FAX: 708/235-2014
Support: 1-800-44-BIMBA
Visit our website at: www.bimba.com Form ULRI-900
Torque ft–lb
(N–m)
Bore Size
Torque ft–lb
(N–m)
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