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Loctite 638 bonds cylindrical fittings with gaps up to 0.25mm. Under metal-to-metal contact, this green anaerobic adhesive cures in 4-5 minutes. High shear strength of 31 N/mm² locks bearings and shafts permanently.
Key Features
- High Oil Tolerance: Bonds surfaces contaminated with industrial cutting fluids or lubricants. Grip stays firm despite heavy oil residues.
- Passive Metal Bonding: Works on stainless steel and plated parts without chemical activators. Skips prep steps on non-reactive metals.
- Vibration Resistance: Prevents loosening from dynamic loads and high mechanical shock. Stops parts shifting under heavy machine use.
- Gap Fill Capacity: Fills diametrical clearances up to 0.25mm in metal housings. Restores tight fits in worn components.
- Thermal Range: Operates within -55°C to 180°C for industrial stability. Holds steady even in high humidity.
Frequently Asked Questions
What is Loctite 638 used for?
It bonds cylindrical parts like bearings, bushings, and gears to shafts. The anaerobic liquid fills gaps up to 0.25mm.
How long does Loctite 638 take to dry?
It reaches fixture strength in 4 to 5 minutes at room temperature. Maximum shear strength requires a 24-hour cure.
