How to Apply Retaining Adhesives


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About Retaining FAQs Bonding vs Fastening

1. Preparation

Cleaning   

  • Use an appropriate LOCTITE cleaner for easier removal of residues in case of old retaining adhesive.
  • It is recommended to use an appropriate LOCTITE cleaner to degrease and clean surfaces prior to applying the adhesive. 

Activation

If cure speed is too slow due to passive metals or low temperature (below 5°C), use a LOCTITE activator such as LOCTITE 7471 MIL-SPEC Primer or  LOCTITE 7649 MIL-SPEC Primer.

 

2. Application

For Slip Fitted Assemblies

  • Apply adhesive around the leading edge of the pin and the inside of the collar and use a rotating motion during assembly to ensure good coverage.

For Press Fitted Assemblies

  • Apply adhesive thoroughly to both bond surfaces and assemble at high press on rates.

For Shrink Fitted Assemblies

  • The adhesive should be coated onto the part to produce a smooth, even film of material. If heating the hub for assembly, coat the pin. If the pin is to be cooled for assembly, coat the hub. If both heating and cooling is to be done, apply material to cooled part. Avoid condensation on cooled parts


For all assemblies:  Parts should not be disturbed until sufficient handling strength is achieved

Equipment

3. Disassembly
  • In many cases, removal with industry standard bearing disassembly tools and techniques, including bearing pullers and hydraulic presses
  • If disassembly tools are not available, apply localized heat to approximately 250°C, disassemble while hot.
  • For corroded or seized parts, use LOCTITE Freeze and Release.

 


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