Hướng dẫn sử dụng Loctite 680

1. Preparation – Cleaning

Use LOCTITE® SF 790™ for easier removal of residues such as old retaining adhesive. Recommend use of LOCTITE® SF 7070™ to degrease and clean surfaces prior to applying the adhesive. For gaps larger than 0.5mm or worn out shafts, bearing seats or keyways, use LOCTITE® metal-filled compounds or LOCTITE® 660™ Retaining Compound.

2. Preparation – Activation

If cure speed is too slow due to passive metals or low temperature (below 5°C), use LOCTITE® SF 7649™ Activator (see cure speed vs activator graph in the TDS). Allow to dry.

3a. Application – For Slip-Fitted Assemblies

Apply adhesive around the leading edge of the male component and the inside of the female component and use a rotating motion during assembly to ensure good coverage. Wipe off excess adhesive.

3b. Application – For Press-Fitted Assemblies

Apply 360 degree beads of adhesive to both bond surfaces at the leading edges of insertion or engagement, and assemble at high press-on rates.  Wipe off excess adhesive.

3c. Application – For Shrink-Fitted Assemblies

Apply the adhesive onto the male component; heat the female component to cause expansion for free assembly.  Assemble components and allow temperatures to equilibrate. Wipe of excess adhesive.

4. Disassembly

Apply localized heat to approximately 500°F/260°C; disassemble while hot. For corroded or seized parts, use LOCTITE® LB 8040™ Freeze and Release.

Disassembly

For manual assembly of adhesive, the use of the LOCTITE® Pro Pump or the LOCTITE® Peristaltic Hand Pump is recommended to ensure a consistent application volume. For semi-automatic or fully-automated dispensing options, contact our technical service team for advice.