LOCTITE® 648™ 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 holding gears and sprockets onto gearbox shafts and rotors on electric motor shafts. LOCTITE® 648™ 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.
- Works on all metal substrates.
- Tolerant towards minor surface contaminations.
- Proven to be tolerant of minor contamination due to industrial oils.
- High strength on all metals, including passive substrates (e.g. stainless steel).
APPLICATION
Retaining
PRODUCT CHARACTERISTICS
|
Technology |
Acrylic |
|
Chemical Type |
Urethane methacrylate |
|
Appearance (uncured) |
Green liquidLMS |
|
Fluorescence |
Positive under UV lightLMS |
|
Components |
One component – requires no mixing |
|
Viscosity |
Low |
|
Cure |
Anaerobic |
|
Secondary Cure |
Activator |
|
Application |
Retaining |
|
Strength |
High |
TYPICAL PROPERTIES OF UNCURED MATERIAL
|
Specific Gravity @ 25 °C |
1.1 |
|
Flash Point – See SDS |
|
|
Viscosity, Brookfield – RVT, 25 °C, mPa·s (cP)
|
Spindle 2, speed 20 rpm 400 to 600LMS |
|
Viscosity, Cone & Plate, 25 °C, mPa·s (cP) |
Shear rate 129 s -1 400 to 600 |
TYPICAL PROPERTIES OF CURED MATERIAL
|
Physical Properties: |
|
|
Glass Transition Temperature ISO 11359-2, °C |
100 |
|
Coefficient of Thermal Expansion, ISO 11359-2, K ^-1 Below Tg Above Tg |
93×10^-06 184×10^-06 |
|
Adhesive Properties |
|
|
Cured for 15 minutes @ 22 °C Compressive Shear Strength, ISO 10123 Steel pins and collars |
N/mm² ≥13.5LMS (psi) (1,960) |
|
Cured for 24 hours @ 22 °C Compressive Shear Strength, ISO 10123 Steel pins and collars |
N/mm² ≥25LMS (psi) (≥3,625) |
|
Cured for 7 days @ 22°C |
|
