Fasto A348 – Fast-Curing Retaining Compound for Cylindrical Metal Assemblies
Fasto A348 is a single-component, high-strength anaerobic retaining compound designed for bonding, retaining, and sealing close-fitting cylindrical metal parts. It cures in the absence of air when confined between metal surfaces, delivering reliable strength and durability for industrial assemblies.
As a fast-curing grade, Fasto A348 develops strength quickly and withstands higher service temperatures than standard retaining products, making it suitable for demanding mechanical environments.
High Retaining Strength Shear strength up to 26 N/mm² for secure assemblies.
Anaerobic Cure Technology Cures only between metal parts, ensuring controlled application.
Fast Strength Build-Up Fixture time around 10 minutes.
Good Temperature Resistance Continuous service from -50°C to +150°C, intermittent up to +175°C.
Small Gap Filling Capability Suitable for gaps up to 0.20 mm.
Corrosion Protection Prevents fretting and corrosion between assembled components.
Assembly Lubrication Effect Parts slide together easily before cure.
Benefits
Provides secure retention of gears, rotors, and shafts
Enhances strength of press-fit assemblies
Reduces reliance on mechanical locking methods
Improves reliability under vibration and thermal variation
Delivers long service life in industrial applications
Primary Application
Sub-Applications
Functional Purpose
Key Performance Advantage
Cylindrical Part Retention
Sleeves, bushes, collars
Permanent locking of cylindrical components
High shear strength for reliable retention
Gear & Rotor Mounting
Gears on shafts, motor rotors
Secure torque transmission
Fast curing with high early strength
Bearing & Bushing Retaining
Bearings on shafts, bushings in housings
Prevent fretting and movement
Augments press-fit and slip-fit assemblies
Press-Fit Assembly Enhancement
Close-fitting metal assemblies
Increase joint strength without machining
Adhesive lubricates during assembly
Motor & Generator Assemblies
Rotors, mechanical drive components
Maintain concentricity and load transfer
High resistance to vibration and shock
Industrial Machinery Assemblies
Pumps, gearboxes, compressors
Structural retention under load
Performs at elevated service temperatures
Corrosion Protection of Fits
Metal-to-metal joints
Protect assembled parts
Anaerobic cure prevents corrosion
Surface Preparation
Ensure parts are clean, dry, and free from oil, grease, dust, and contaminants.
Proper cleaning is critical for achieving maximum strength.
Application Method
Apply Fasto A348 evenly to all engaged surfaces.
Assemble the parts immediately.
Allow the joint to cure under anaerobic (air-excluded) conditions.
Wipe off excess adhesive from the outside of the joint.
Curing Guidelines
Fixture time: ~10 minutes
Full cure: 12 hours
Maximum recommended gap: 0.20 mm
Additional Notes
Cure speed depends on temperature, bond gap, and substrate type.
On inert metals (e.g., stainless steel, zinc-plated parts) or at temperatures below 5°C, use Fasto AP49 Activator to accelerate cure (may reduce final strength by up to 30%).
Not recommended for certain plastics due to possible stress cracking.
To access Technical & Safety Documents, please submit your details.
