Industrial diamonds are used in some of the most demanding environments, from cutting and grinding to drilling and precision machining. Whether you’re manufacturing a new tool or repairing worn diamond segments, selecting the right adhesive is essential for achieving a durable, high-strength bond. Read on to understand what makes the best adhesive for bonding diamond to metal.
Unlike decorative gemstones, industrial diamonds are exposed to extreme loads, vibration, friction and elevated temperatures. The adhesive must therefore provide exceptional mechanical strength while maintaining its performance under demanding operating conditions.
In this guide, we’ll explain what makes a good diamond bonding adhesive, the materials it can bond, and why Permabond ES550 Heat Cure Epoxy is an excellent choice for industrial diamond applications.
Why Bond Diamond Instead of Brazing?
While brazing remains common for many diamond tools, adhesive bonding offers several advantages in certain applications.
Benefits include:
- Lower processing temperatures
- Reduced thermal stress on components
- No risk of heat distortion
- Cleaner manufacturing process
- Suitable for precision assemblies
- Excellent gap-filling capability
- High resistance to vibration and impact
For repair work and specialised tooling, adhesive bonding is often quicker and more economical than traditional brazing methods. According to Permabond, specialist heat cure epoxy adhesives are widely used for bonding industrial diamonds to metal substrates in cutting, grinding and drilling applications where high strength and durability are essential. In many manufacturing applications, the best adhesive for bonding diamond to metal can provide a practical alternative to traditional joining methods.
Challenges of Bonding Diamond
Diamond is an extremely hard, chemically inert material with very low surface roughness. This makes selecting the correct adhesive particularly important.
The adhesive must provide:
- Excellent adhesion to both diamond and the metal substrate
- High compressive and shear strength
- Resistance to shock loading
- Excellent vibration resistance
- Good heat resistance
- Long-term environmental durability
A general-purpose epoxy or cyanoacrylate adhesive is rarely suitable for demanding industrial applications. Choosing the best adhesive for bonding diamond to metal is essential for achieving a durable, long-lasting bond in industrial tooling applications.
Best Adhesive for Bonding Diamond to Metal: Permabond ES550
For high-performance industrial applications, Permabond ES550 Heat Cure Epoxy offers an outstanding combination of strength, durability and temperature resistance.
Key features include:
- One-part heat cure epoxy
- High shear strength
- Excellent impact resistance
- Outstanding vibration resistance
- Bonds diamond to steel, stainless steel, carbide and many engineering materials
- Good resistance to oils, fuels and industrial chemicals
- Excellent long-term durability
- Convenient single-component formulation with no mixing required
Because ES550 is supplied as a one-part adhesive, application is consistent and simple, making it ideal for production environments.
Typical Applications
Permabond ES550 is suitable for bonding:
- Diamond cutting segments
- Diamond grinding wheels
- Core drill segments
- Diamond saw blades
- Wear-resistant diamond inserts
- Industrial cutting tools
- Precision machining equipment
- Diamond-coated tooling
It is also suitable for repairing certain industrial diamond components where adhesive bonding is appropriate.
Suitable Substrates
ES550 bonds industrial diamonds to a wide range of engineering materials, including:
- Carbon steel
- Stainless steel
- Tool steel
- Carbide
- Ceramics
- Ferrite
- Many composite materials
Correct surface preparation is essential for achieving maximum bond strength.
Surface Preparation
To obtain the strongest possible bond:
- Remove grease, oil and contaminants.
- Abrade metal surfaces where appropriate.
- Clean thoroughly using a suitable solvent.
- Apply the adhesive evenly.
- Cure according to the recommended heat cure schedule.
Proper preparation can significantly improve both bond strength and long-term reliability.
Heat Cure Benefits
Unlike room-temperature epoxies, heat curing enables ES550 to develop exceptional mechanical properties.
Benefits include:
- Faster production cycles
- Higher cross-link density
- Improved chemical resistance
- Greater structural strength
- Better long-term heat resistance
These characteristics make ES550 particularly suitable for demanding industrial environments.
Why Choose Adhesive Supply Company?
At Adhesive Supply Company, we supply genuine Permabond adhesives backed by technical advice to help you select the right product for your application.
Whether you’re bonding diamond tooling for manufacture, maintenance or repair, we can recommend the most suitable adhesive for your requirements.
Explore our Permabond ES550 Heat Cure Epoxy product page or contact our technical team for expert advice.
Frequently Asked Questions
Can you glue diamond to metal?
Yes. Industrial diamonds can be bonded to metals using specialist structural epoxy adhesives such as Permabond ES550, provided the correct surface preparation and curing procedures are followed.
Is epoxy strong enough for industrial diamonds?
High-performance heat cure epoxies can provide excellent bond strength and vibration resistance, making them suitable for many industrial diamond applications.
Can ES550 bond diamond to carbide?
Yes. Permabond ES550 is suitable for bonding diamond to carbide, steel and many other engineering substrates.
Does ES550 require mixing?
No. ES550 is a one-part heat cure epoxy supplied ready for application.