LOCTITE 648: High-Strength, High-Temperature Retaining Compound for Precision Assemblies
This low viscosity, high strength, anaerobic-curing retaining compound is designed for bonding cylindrical fitting parts. Even works on slightly oily surfaces, e.g., from various oils, such as cutting fluids.
LOCTITE 648 is a premium, green, low-viscosity anaerobic retaining compound engineered for the high-strength bonding of cylindrical fitting parts. It is specifically designed to provide robust performance in the presence of minor surface contaminants (such as cutting or protection oils) and exhibits exceptional strength on "passive" substrates like stainless steel without requiring a primer. By filling the microscopic voids between close-fitting metal surfaces, it creates a solid, unitized assembly that prevents loosening, leakage, and fretting corrosion caused by extreme vibration and shock.
| Category | Adhesive | Brand | Henkel |
| Part No. | LOCTITE 648 | OEM Part No. | Not Avaliable |
| Alt Part No. | Not Available | Country of Origin | Not Available |
| Pro Category | Not Available | Is Return | Yes |
| Condition | Self Life | ||
| Pack Size | |||
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 due to shock and vibration. It exhibits a robust curing performance. The product also works on passive substrates and offers high-temperature performance and good oil tolerance.
Application
- Aerospace MRO: Securing bearings into housings, bushings, and turbine rotor spindles where precision alignment and thermal stability are critical.
- Electric Motors: Mounting rotors on shafts to handle high-speed dynamic loads and prevent slippage.
- Gearboxes: Holding gears and sprockets onto shafts to eliminate the need for keyways or set screws that cause stress concentrations.
- Hydraulic Systems: Retention of press-fitted or slip-fitted components exposed to high-pressure fluids and thermal expansion.
LOCTITE 648
- Technology: Acrylic / Anaerobic.
- Chemical Type: Urethane methacrylate.
- Color: Green liquid.
- Viscosity: Low (500 mPa·s).
- Strength: High Strength.
- Operating Temperature: -55°C to +180°C (-67°F to +356°F).
- Shear Strength (Steel): >27 N/mm² (3,900 psi).
- Fixture Time: ~3 minutes (on steel).
- Fluorescence: Positive under UV light (for quality control inspection).
- Pack Size: 10 ml, 50 ml, and 250 ml bottles.
- Hazard Class: Non-hazardous for standard air/ground transport (check regional SDS).
- Lead Time: Typically ex-stock for 50ml and 250ml sizes.
- Security: Shipped with 100% secure payment
- Surface Preparation: Although oil-tolerant, for maximum strength, clean surfaces with LOCTITE SF 7063 to remove heavy grease.
- Activation: On passive metals (stainless steel, aluminum) or in cold temperatures, use of LOCTITE SF 7649 activator is recommended to accelerate cure.
- Full Cure: Achieves full strength in 24 hours.
- Storage: Store in unopened containers between 8°C and 21°C.
