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.
| Supplier | |
|---|---|
| Additive Classification | Mold Release Agents |
| Industry | Automotive & Transportation, Building & Construction, Home Renovation, Marine Vessels, Petrochemical, Wind Energy |
| Specific Gravity @ 25 °C | 1.1 |
| 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 |
| Flash Point | See SDS |
For Assembly
1. For best results, clean all surfaces (external and internal) with a LOCTITE® cleaning solvent and allow to dry.
2. To accelerate cure speed or where large gaps are present, use activator and allow to dry.
3. For Slip Fitted Assemblies, apply adhesive around the leading edge of the pin and the inside of the collar and use a rotating motion during assembly to ensure good coverage.
4. For Press Fitted Assemblies, apply adhesive thoroughly to both bond surfaces and assemble at high press on rates.
5. For Shrink Fitted Assemblies, the adhesive should be coated onto the part to produce a smooth, even film of material. If heating the hub for assembly, coat the pin. If the pin is to be cooled for assembly, coat the hub. If both heating and cooling is to be done, apply material to cooled part. Avoid condensation on cooled parts.
6. Parts should not be disturbed until sufficient handling strength is achieved.
For Disassembly
1. Remove with standard hand tools.
2. If needed, apply localized heat to the assembly to approximately 250 °C. Disassemble while hot.
3. If this temperature is not possible, heat as much as possible and use mechanical aids.
For Cleanup
1. Cured product can be removed with a combination of soaking in a Loctite solvent and mechanical abrasion such as a wire brush.
Brand：Trigonox®
Chemical family：Organic peroxide
CAS number：80-15-9
Physical form：Liquid
Molecular Weight：152.2
Chemical name：Cumyl hydroperoxide
Brand：Trigonox
Chemical family：Organic peroxide
CAS number：26748-41-4
Physical form：Liquid
Molecular Weight：244.4
Chemical name：tert-Butyl peroxyneodecanoate, 75% solution in isododecane
Brand:Butanox®
Chemical family:Organic peroxide
CAS number:1338-23-4
Physical form:Liquid
Chemical name:Methyl ethyl ketone peroxide, solution in dimethyl phthalate
Brand:Butanox®
Chemical family:Organic peroxide
CAS number:1338-23-4
Physical form:Liquid
Chemical name:Methyl ethyl ketone peroxide
Brand:Polylite
Appearance:Light yellow transparent viscous liquid
Acid Value:14-22 mg KOH/g
Viscosity, 25℃:1.6-2.3 Pa.s
Solid Content:70-76 %
Gel Time, 25℃:8.5-10.5 min
Thermal Stability, 80℃:≥24h
Brand:Polylite
Appearance: Clear liquid,no visible mechanical impurity
Epoxy Equivalent (g/eq): 176–184
Color (Gardner): Max 1.0
Flash Point (℃): Above 150
Viscosity (cps, at 25℃): 8000–11000
Hydrolyzable Chlorine Content (ppm): Below 1000
Specific Gravity (g/cm³, 25℃): 1.16
