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Machine Hammer Peening (MHP) always makes the workpiece better!

Any tool or equipment component where operating performance and life cycle improvement is desired, are candidates for peening. This includes parts subject to abrasion, wear, fatigue caused by thermal variances, fluctuating dynamic loads, stress cracking, environmental conditions, chemical corrosion, etc.

Different materials and objectives require adaptation of process parameters. These include hit rate, impact force, striker diameter & form, stroke length, pitch, feedrate, approach angle, etc. Our knowledge and experience allows us to assist you in setting up successfully for a wide range of applications.

Proven results include:

Highest diamond buff grades of polished finish are possible.
Improved wear resistance form significant increase of hardness in surface layer through mechanical process, up to 1.5 mm depth.
Metallurgical Properties
Metallurgical properties of materials are upgraded permitting use of lower cost materials.
Particulate Matter
Particulate matter can be embedded/bonded into surface layer by peening to produce composite materials. For example nano particles from tungsten carbide chips can be cold forged into aluminum for an extremely wear resistant light-weight material.
Residual Compressive Stress
Impact forces remove harmful tensile stresses in surface brought on by machining or heat treatment and replaces with high degree of residual compressive stress deep beneath the surface. This increases material strength and resistance to fatigue and cracking.
Prevention of Galling
Prevention of galling, two surfaces from same material in contact with one another can lead to particulate transfer and fusing or galling. Peening one surface creates sufficient dissimilarity in surface characteristics to prevent galling.
Secondary Processes
Secondary processes such as heat treating, coating and nitriding may become unnecessary, or where such processes are still applied results are improved.
Localized Treatment
Localized treatment for critical areas. Because it is a controlled process specific areas can be isolated for peening – it is not always necessary to treat the entire surface. Also useful for repairs and welded areas.
Improved Tribology

Reduced friction and better material flows from improved tribological effects of sliding surfaces in contact.


Automotive Deep Drawing Dies
Fitted punch/cavity forming tools for Class A (outer) and Class B (inner) body panels. Eliminate manual polishing; decrease finish milling time; improve material flow; improve platform for coatings if required; accurate feedback to simulation/design software (no handwork to alter geometries). Also produces better results for repairs.
Hot Stamping Tools
Surfaces mechanically hardened up to 64 HRC by peening after or instead of heat treating are less prone to cracking so they last longer; or tungsten overlay can be peened/cold-worked into surface to increase life cycles; or peen-hardened alloy inserts with higher conductive properties can be used for faster cooling time and faster production cycles.
Die Cast Dies
Heat and abrasion resulting from casting molten metals into steel forms causes pitting and micro-fractures in die surfaces known as heat-checking and causes inevitable tool failure. Machine hammer peening by imparting compressive stress deeply into the die surface has proven highly beneficial in extending life cycles of these tools by 5 to 10 times or more.
Injection Molds
Eliminate or significantly reduce manual polishing; decrease finish milling time.
Hydroforming Dies
Same as draw dies, also increased life cycles due to hardness increase.
Compression Molds
Eliminate manual polishing; decrease finish milling time; peen-harden for longer lifetime
Carbon Fiber Mold Inserts
Peen-hardened alloy inserts in molds for forming highly abrasive carbon fiber composite panels. Increased life cycles.
Forging Dies
Residual compressive stress reduced cracking, reduced material transfer, and increased service life. Also beneficial for repairs to localized defects.
Roll Tools for Profile Forming
Roll tooling used for progressive forming of panels or structural sections. Increased wear and fatigue resistance and improve lifetime dramatically resulting in longer production runs and less downtime.


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