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SONLOK® 3680 is a fast curing; high strength anaerobic retaining compound for cylindrical joints. SONLOK® 3680 retaining compound is a single component anaerobic adhesive, which develops high strength rapidly when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from Vibration and shock.

Product Type: 1K (1 component) Adhesive, Anaerobic Adhesive

Compatible Substrates & Surfaces: Metal

Chemical Family: Methacrylates

Features: Chemical Resistant, Fast Cure, High Strength

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Composition
Methacrylate Esters

Features & Benefits

Ready-to-Use Product Features

Applications & Uses

Compatible Substrates & Surfaces
Applications
  • Ideal to fill gaps up to 0.15 mm diameter clearance.
  • Retaining Sleeves, Pulleys, Gears, Rotors, and Fans on shafts.
  • Mounting sleeves, Securing bushings, bearings and plugs in housings.
  • 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 Time10min
Functional Cure Time3-Janh
Full Cure Time24h
Compressive Shear Strength (After 24 hours at 22°C,Steel Pins & Collars)(min. 29) min. 4000(N/mm2)psiISO 10123
Compressive Shear Strength (After 30 minutes at 22°C,Steel Pins & Collars)(min. 16) 2100(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)1200cps
Specific Gravity1.1
Maximum Diameter of Thread/Gap Filling0.15mm
Flash Pointmin. 93°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 95
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 98

 

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.