KK hardening container

For fast cooling in water, polymer, or oil

We designed our hardening containers so that they would stand up even in heavy operations. Thanks to the charge basket or grate, you can manipulate the charge easily and conveniently. KKs are used for quick cooling during heat treatment of metal charges. The circulation of the medium ensures that heat is intensively drawn off of the charge, making it cool faster. It sees regular use, for instance when hardening in water, polymer, or oil, and so we also supply it in a stainless steel variant.

I’m interested in a hardening container

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  • Simple to control
  • 24-month warranty
  • Sturdiness of design
  • Circulation of medium for intensive drawing off of heat from the charge
  • Easy manipulation of the charge thanks to the charge basket or grate
  • Stainless steel variant (for water and polymer)

Charge treatment technology

  • Hardening
  • Solution annealing of non-ferrous metals

Technical parameters

Container equipment


Furnace type Volume of filling in l External dimensions (w × h × d) mm Grate dimensions (w × d) mm Weight in kg Input in kW Voltage V Max. grate load in kg
KK 250 (oil) 300 1150×1830×1150 600×700 300* 3 400 30
KK 250 (water) 300 1150×1830×1150 600×700 300* 3 400 30
*Weight without filling
Containers are supplied without filling.
Subject to technical changes.

Standard equipment

  • variant for oil hardening medium (internal tub and construction steel grate)
  • variant for water hardening medium (stainless steel internal tub, stainless steel grate)
  • pneumatically controlled grate motion
  • mixing of hardening medium


Optional accessories available at additional cost

  • heating of hardening medium (3kW); maximum bath temperature 80 °C
  • cooling of hardening medium

Custom additional components

  • increase to heating output

Note: When combining accessories (at additional cost), consult with our technical office.
Almost 20.000 furnaces manufactured
Our own team of maintenance technicians
25-member design team
6 custom projects per month
Testing of your specific charges

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https://www.lac.cz/en/furnaces-and-dryers/kk-hardening-container | https://www.lac.cz/en/furnaces-and-dryers/kk-hardening-container