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.
FEATURES AND BENEFITS
- Prevents loosening: It fills all gaps between the cylindrical components and cures into a hard thermoset plastic. This unitizes the assembly and prevents loosening and leakage from shock and vibration.
- High temperature resistance.
- Prevents metal fretting and corrosion and Seals against leakage.
APPLICATION
Retaining
PRODUCT CHARACTERISTICS
|
Technology |
Acrylic |
|
Chemical Type |
Methacrylate ester |
|
Appearance (uncured) |
Green liquidLMS |
|
Components |
One component – requires no mixing |
|
Viscosity |
High |
|
Cure |
Anaerobic |
|
Secondary Cure |
Activator |
|
Application |
Retaining |
|
Strength |
Medium to High |
TYPICAL PROPERTIES OF UNCURED MATERIAL
|
Specific Gravity @ 25 °C |
1.16 |
|
Flash Point – See SDS |
|
|
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 1200 to 2400 |
TYPICAL PROPERTIES OF CURED MATERIAL
|
Physical Properties: |
|
|
Coefficient of Thermal Expansion, ISO 11359-2,K^-1 |
80×10^-6 |
|
Coefficient of Thermal Conductivity, ISO 8302, W/(m·K) |
0.1 |
|
Specific Heat, kJ/(kg·K) |
0.3 |
|
Elongation, at break, ISO 37, % |
<1 |
|
Adhesive Properties |
|
|
After 24 hours @ 22 °C Compressive Shear Strength, ISO 10123 Steel pins and collars |
N/mm² ≥17.2 LMS (psi) (≥2,495) |
|
Cured for 24 hours @ 22 °C, followed by 24 hours @ 177 °C, tested @ 22 °C Compressive Shear Strength, ISO 10123 Steel pins and collars |
N/mm² ≥24.1 LMS (psi) (3.495) |
