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
Typical Properties
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
