LOCTITE® 620

LOCTITE® 620 is designed for the bonding of cylindrical fitting parts. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. Typical applications include locating pins in radiator assemblies, sleeves into pump housings and bearings in auto transmissions. Particularly suitable for applications where temperature resistance up to 200°C is required.

TYPICAL PROPERTIES OF UNCURED MATERIAL

Flash PointSee SDS

Specific Gravity @ 25 °C1.16
Viscosity, Brookfield – RVT, 25 °C, mPa·s (cP):
Spindle 5, speed 20, rpm
5,000 to 12,000LMS
Viscosity, EN 12092 – MV, 25 °C, after 180 s, mPa·s (cP):
Shear rate 129 s-1
1,200 to 2,400

Directions for Use

For Assembly
1. For best results, clean all surfaces (external and internal) with a LOCTITE® cleaning solvent and allow to dry.
2. If the material is an inactive metal or the cure speed is too slow, spray with Activator 7471™ or 7649™ and allow to dry.
3. Shake the product thoroughly before use.
4. 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.
5. For Press Fitted Assemblies, apply adhesive thoroughly to both bond surfaces and assemble at high press on rates.
6. For Shrink Fitted Assemblies the adhesive should be coated onto the pin, the collar should then be heated to create sufficient clearance for free assembly.
7. Parts should not be disturbed until sufficient handling strength is achieved.
For Disassembly
1. Apply localized heat to the assembly to approximately 250 °C. Disassemble while hot.
For Cleanup
1. Cured product can be removed by soaking in a Loctite® solvent, e.g. Loctite® 7200 and mechanical removal with a soft scraper. Avoid formation of dust and aerosols.Complete the cleaning process by wiping with a soft cloth dampened with Loctite® Cleaner, e.g. Loctite® 7063 or Loctite® ODC-free cleaner.

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