Burnish your reputation with Monaghan Tooling Group and Elliott Tool Technologies.

Invented more than a century ago (and since perfected), burnishing has stood the test of time through its efficiency, versatility and simplicity.

What is Burnishing?

Burnishing is a chipless machining method which cold works the metal without cutting or abrading the surface.

It removes no metal but rather compresses, or “irons-out” the peaks of a metal surface into the valleys, generating a dense and uniform surface.

Roller burnishing improves surface finish and results in dimensional accuracy.

Compressive Forces

The cold working condenses the grain structure of metal, producing an increase in surface hardness from 50% to 100%, within a penetration of .010” to .030” on the part’s surface.

In roller burnishing, the material is elastically deformed to a given depth below the surface. The result is compressive stresses at the surface. In turn, this increases the resistance of the material to fatigue failure because any external forces must first overcome these residual stresses.

Burnishing Advantages

Low microinch finish

  • Produces a 4 to 8 Ra surface finish in one pass.
  • Improves surface irregularities and tool marks.

Process improvements

  • Burnishing is a repeatable and consistent process
  • Fast cycle times – measured in seconds, not minutes!

Accurate sizing

  • Multi-roll burnishing tools produce accurate sizing in .0001″ increments.
  • Roller burnishing in 25% size improvement in steel and up to a 50% improvement in high ductility materials.

Low cost

  • Eliminates secondary machines and set ups.
  • Eliminates secondary processes such as grinding, honing and polishing.
  • Elliott burnishing tools feature long lasting and replaceable wear parts reducing total cost over the life of the tool.

Work hardening

  • Burnishing increases the surface hardness through the cold working process and compressive forces.
  • Increases metal’s resistance to fatigue and failure at stress points.
  • Produces a dense and uniform surface.

Versatility

  • Burnishing is effective for many different part configurations.
  • Suitable process for a variety of metals – all ductile metals can be burnished!
  • Multi-roll burnishing tools are adjustable to cover a size range.

Proven quality

  • The burnishing process has been refined and improved  for over 100 years and has a proven record of success.
  • Monaghan Tooling Group and Elliott tool continue this long tradition by providing the industry’s highest quality burnishing tools.

Easy to use

  • MTG and Elliott burnishing tools require limited training to operate.
  • Easy to maintain and repair – Maintenance instructions are always available here.
  • Common repair parts are always stocked!

Types of Burnishing Tools

Burnishing Requirements

Materials:

  • Steel, stainless steel, titanium, Inconel, aluminum, brass, bronze, cast iron, ductile iron, other ferrous and non-ferrous materials.

Hardness:

  • Multi-roller burnishing tools up to Rc 45
  • Carbide-roll & diamond burnishing tools up to Rc 55
  • For harder materials, contact us.

Proper Surface Prep:

  • Turned surfaces of 80 to 120 microinch are best suited for burnishing applications.
  • A surface with a peak and valley pattern, without gouges and tears, gives the best burnishing results.