Increase wear resistance and extends the service life of treated parts from 2 to 6 times.
The ENPO UR-121, Electro Metal Surface Hardening Device, is designed for impregnating wear resistance metals via metal probes onto external and inner parts of machine parts, cutting instruments, die stamp equipment and the application of electric conductive coatings.

  • Metal Cutting Industry
  • Wood Cutting Industry
  • Stamping Industry
  • Aluminum Die Casting
  • Machine Components
  • Press Tool Fittings
  • Stone Industry
  • Brick Industry
  • Injection Molding
  • Glass Forming Industry

It can easily reclaim/repair worn tools such as saw blades and drill bits. It can also be used to form of a hybrid tool with a wear resistance between that of high speed steel and solid Tungsten Carbide, but capable of sustaining shocks that would cause solid tungsten carbide to break or chip.

The ENPO UR-121 coating speed is faster with a higher quality of alloy layer density and under the surface impregnation which is more durable than that of coatings made by similar devices.

The ENPO UR-121 process increases wear resistance and expand service life of the treated parts, from 2 to 6 times, depending on the surface and the probe materials. The working principal is based on spontaneous electrical discharges as the vibrating probe touches the surface of the part to be treated. The device has six operating options with the ability to deposit a coating thickness on the surface from 0.2 up to 0.8 mils, with 0.5 up to 3.0 mils impregnated under the surface material. Currently 20,000 such devices are in operation worldwide.


  • It works at readily available - 11O V 60 Hz or 220 V 50 Hz
  • Very compact and portable 6.5Ħħ x 14Ħħ x 12Ħħ and weighs 16.5 lbs
  • Easy to maintain and environmentally safe
  • Process produces no heat and will not affect heat-treated parts
  • Coatings permanently bond to the treated surface
  • Application is inexpensive and quick
  • Perfect for OEM and in-plant tool room/maintenance applications




Hardening Alloy
Layer Above Surface
0.3 mils
0.5 mils
1.0 mils
Hardening Alloy Impregnation Layer*
1.0 mils
2.0 mils
3.0 mils

*Note only Tungsten and Titanium Carbide probes will penetrate under the surface.

Micro-hardness range up to 62 Rockwell and Roughness 0.05 ?0.10 mils

Each probe can produce up to 78 sq. in. of surface coatings with an application speed of 5 to 6 minutes per 1 square inch. The probe consumption rate is 0.001 grams/mm

Actual Application Pictures



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