Kollmorgen Essentials Motor Shaft Seal Kit - Installation

Install the Shaft Seal Kit prior to installation of either keyway that is included with every Kollmorgen Essentials Motor.

Remove power (de-energize) to the servo motor prior to any installation work.

Procedure

  1. Remove the power to the servo motor prior to installation of the shaft key or seal.
  2. Verify all kit contents and required tools are available for kit installation.
    See Kollmorgen Essentials Motor Shaft Seal Kit - Contents, Required Tools and Supplies, Optional Tools.
  3. Remove any installed shaft key (if applicable) from the shaft.
  4. Inspect all surfaces for any damage, including nicks or burrs.
    If nicks or burrs are present, use an abrasive cloth to remove.

    • Be aware of the sharp edges of the keyway slot in the shaft.
    • Use tape to protect the shaft seal lip from damage.

    Kollmorgen is not liable for user alterations or damages to the shaft or servo motor body.

  5. Place the protective pad on a firm, flat, horizontal surface.
  6. Place the servo motor on the protective pad to avoid damaging the powder coating. (Figure 1)

    7. Figure 1: Servo motor on protective pad

  7. Inspect and clean the motor shaft and pilot ring surfaces where the shaft seal makes contact.
  8. Using a clean brush with MOLYKOTE grease, coat the inner shaft seal lip (Figure 2) and apply a film of grease to the outer diameter O-ring of the seal (Figure 3).

    		9.

    Figure 2: MOLYKOTE® grease to coat the inner shaft seal lip and outer diameter o-ring of the seal

    Figure 3: MOLYKOTE grease to coat the outer diameter O-ring

    • Shaft seals require a lubricant to reduce wear.
    • Lubricate only the inner shaft seal lip and outer diameter o-ring of the seal.
    • Do not lubricate the motor pilot bore.
  9. Place the lubricated shaft seal over the servo motor shaft.
  10. Carefully maneuver the seal inner diameter over the shaft diameter.

    		11.
    • The shaft seal must not be cut or nicked during this operation or the IP rating is compromised.
    • If any shaft seal damage is noticed, dispose of the seal and replace with a new one starting with Step 7.
  11. Insert the shaft seal over the shaft so that the ID lip curves up. (Figure 4)

    12. Figure 4: Shaft seal over the shaft

  12. Use your hands, or the optional installation tool, to gently press the seal into position. (Figure 5)
    See Optional Tools.

    13. Figure 5: Seal in position

  13. Use your hands or the optional installation tool to press the shaft seal until it is seated flush with the servo motor pilot height with the back of the seal resting against the beveled retaining ring. (Figure 6)

    14. Figure 6: Installation tool used to press the shaft seal
    • The beveled retaining ring in front of the bearing should:
      • Act as a natural axial limit for the shaft seal.
      • Protect against any movement of the rotor assembly that could cause unintentional damage.
    • Proper installation is when the seal is flush, or sub-flush, with the front surface of the pilot. (Figure 7)
    • Significant force should not be necessary, but do not exceed the limits of the axial force identified in this table:

    Motor Series

    Maximum Axial Force (N)

    KEM-2V020 or KEM-xV040

    600

    KEM-xV075 or KEM-xV100

    1400

    KEM-xV150 or KEM-xV250

    1740

    KEM-xV300 or KEM-4V400

    2200

    • Do not press on the shaft during shaft seal installation.
    • Pay careful attention to not damage the motor flange during installation.

    Figure 7: Flush seal

  14. Remove the installation tool from the seal and visually inspect the installation. (Figure 8)

    15. Figure 8: Inspect the installation

    The outside diameter of the shaft seal should be flush or sub-flush with the motor pilot height. (Figure 8)
  15. Wipe the excess MOLYKOTE® grease off the shaft. (Figure 9)

    16. Figure 9: Wipe off the MOLYKOTE grease

  16. Spin the servo motor shaft by hand.
  17. Look and listen for any squeaks, rubs, or tears in the seal.
    If the seal installation is suspect, remove and replace the seal starting at Step 7.
  18. Install applicable shaft key into the servo motor shaft.
    See Kollmorgen Essentials Motor Shaft Key Kit - Installation.

See Also

Kollmorgen Essentials Motor Shaft Seal Kit - Seal Removal.