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Sonlok® 3641 is a medium strength anaerobic bearing compound for continuous working temperatures up to 300°F.

Product Type: Anaerobic Adhesive

Chemical Family: Methacrylates

Features: Chemical Resistant, Medium Strength, Medium Viscosity

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Product Type
Composition
Methacrylate Ester

Features & Benefits

Applications & Uses

Applications
  • Ideal to fill gaps up to 0.008” diameter clearance.
  • High performance, controlled strength, versatile bearing compound.
  • Used for fittings bearings, bushes and oil seals. Ideal for cylindrical parts that require disassembly. Permits sliding fit and eliminates distortion.
  • Excellent retaining, sealing and thread locking compound.
Directions for use

For Assembly

  • For best results, clean all surfaces (external and internal) with a cleaning solvent and allow solvent to evaporate.
  • If the material is an inactive metal or the cure speed is to0 slow, spray with Activator 3071 or 3049 and allow to dry.
  • 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.
  • For Press Fitted Assemblies, apply adhesive thoroughly to both bond surfaces and assemble at high press on rates.
  • For Shrink Fitted Assemblies the adhesive should be coated onto the pin, the collar should then be heated to create sufficient clearance for free assembly.
  • Parts should not be disturbed until sufficient handling strength is achieved.

For Disassembly

  • Apply localized heat to the assembly to approximately 250°C. Disassemble while hot.

Properties

Physical Properties
ValueUnitsTest Method / Conditions
Coefficient of Thermal Expansion80×10^-6K-1ASTM D 696
Coefficient of Thermal Conductivity0.1W/(m·K)ASTM C 177
Specific Heat0.3kJ/(kg·K)
Cured Properties
ValueUnitsTest Method / Conditions
Handling Cure Time30min
Functional Cure Time4-Febh
Full Cure Time24h
Compressive Shear Strength (After 24 hours at 22°C,Steel Pins & Collars)(min. 12) min. 1500(N/mm2)psiISO 10123
Temperature Range-55 to 150°C
Adhesive Properties
ValueUnitsTest Method / Conditions
Viscosity (25°C, Brookfield RVT Spindle 4 at 25 rpm)1000cps
Specific Gravity1.07
Flash Pointmin. 100°C
Solvent ContentNone

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Chemical Resistance
Chemical Temperature

% Initial Strength Retained

500 hours 1000 hours
Acetone 22°C 100 100
Ethanol 22°C 100 100
Motor Oil 125°C 100 100
Gasoline 22°C 100 100
Brake Fluid 22°C 100 100
Water/Glycol 87°C 100 95

 

Packaging & Availability

Packing
  • 10 ml
  • 50 ml
  • 250 ml
  • 1 liter
  • 10 liter

Storage & Handling

Shelf Life
1 year
Storage

Anaerobic adhesives shall be ideally stored in a cool, dry place in unopened containers at a room temperature between 46°F to 82°F. Please do not return any unused material to its original container.