LOCTITE® 680™ is designed for the bonding of cylindrical fitting parts, particularly where low viscosity is required. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. LOCTITE® 680™ provides robust curing performance. It not only works on active metals (e.g. mild steel) but also on passive substrates such as stainless steel and plated surfaces. The product offers high temperature performance and oil tolerance. It tolerates minor surface contaminations from various oils, such as cutting, lubrication, anti-corrosion and protection fluids.
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.
- Robust curing on various metal substrates even in the presence of minor surface contamination.
- Oil tolerant.
APPLICATION
Retaining
PRODUCT CHARACTERISTICS
|
Specific Gravity @ 25 °C |
1.1 |
|
Flash Point – See SDS |
|
|
Viscosity, Brookfield – RVT, 25 °C, mPa·s (cP) |
Spindle 3, speed 20 rpm, 750 to 1,750LMS |
|
Viscosity, Cone & Plate, 25 °C, mPa·s (cP) |
Shear rate 129 s -1 650 to 1850 |
TYPICAL PROPERTIES OF UNCURED MATERIAL
|
Specific Gravity @ 25 °C |
1.1 |
|
Flash Point – See SDS |
|
|
Viscosity, Brookfield – RVT, 25 °C, mPa·s (cP) |
Spindle 3, speed 20 rpm, 750 to 1,750LMS |
|
Viscosity, Cone & Plate, 25 °C, mPa·s (cP) |
Shear rate 129 s -1 650 to 1850 |
TYPICAL PROPERTIES OF CURED MATERIAL
|
Physical Properties: |
|
|
Coefficient of Thermal Expansion, ISO 11359-2, K ^-1 |
52×10^-6 |
|
Adhesive Properties |
|
|
Cured for 1 hour @ 93 °C, tested @ 22 °C Compressive Shear Strength, ISO 10123 Steel pins and collars |
N/mm² ≥24.1 LMS (psi) (≥3,500) |
|
Cured for 24 hours @ 22 °C Compressive Shear Strength, ISO 10123 Steel pins and collars |
N/mm² ≥ 19.3 LMS (psi) (≥2,800) |
