LOCTITE® 620 High Temperature Retaining Compound
Features and Benefits
- Ideal for shafts, gears, pulleys and similar cylindrical parts
- Operating temperature: -55°C to 230°C (-65°F to 450°F)
Documents and Downloads
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Technical Information
Agency approvals / certificates / specifications | DVGW (EN 751-1): NG-5146AR0622 |
Application method | Dispense system, Manual |
Applications | For high temperature applications, For slip fitted parts, Retaining |
Color | Green |
Cure type | Anaerobic cure |
Fixture time | 60.0 min. |
Gap fill | 0.15 - 0.25 mm |
Key characteristics | Cure speed: slow cure, Gap filling, Strength: medium to high strength, Temperature: high temperature, Viscosity: high viscosity |
Number of components | 1 part |
Operating temperature | -55.0 - 230.0 °C (-65.0 - 450.0 °F ) |
Physical form | Liquid |
Recommended for use with | Metal: steel |
Shear strength, Steel | 26.0 N/mm² (3800.0 psi ) |
Viscosity | 8000.0 mPa·s (cP) |
How to
Step by Step Guide
1. Preparation - Cleaning
Use LOCTITE® 790/7200 for easier removal of old retaining adhesive residue. It is recommended to use LOCTITE® 7063/7064/7070 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 activator LOCTITE® 7240 or LOCTITE® 7649 (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 parts are hot. For corroded or seized parts, use LOCTITE® 8040 Freeze and Release.
Equipment
For manual assembly of adhesive the use of the LOCTITE® Pro Pump or 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.