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Chamber Furnaces for Annealing, Hardening and Brazing

Chamber furnace N 7/H as table-top model Chamber furnace N 61/H

Working with protective gas boxes for a protective gas atmosphere using a charging cart

To withstand harsh use in the laboratory, e.g. when heat-treating metals, robust insulation with light refractory bricks is necessary. The chamber furnaces N 7/H - N 87/H are a perfect fit to solve this problem. The furnaces can be extended with a variety of accessories, like annealing boxes for operation under protective gas, roller guides, or a cooling station with a quench tank. Even high-performance applications like the annealing of titanium in medical applications can be implemented without the use of expensive and complicated annealing systems.

  • Tmax 1280 °C
  • Deep furnace chamber with three-sides heating: from both side walls and bottom
  • Heating elements on support tubes ensure free heat radiation and a long service life
  • Bottom heating protected by heat-resistant SiC plate
  • Low energy consumption due to multi-layer insulation
  • Exhaust opening in the side of the furnace, or on back wall of chamber furnace N 31/H and higher
  • Base frame included in the delivery, N 7/H - N 17/HR designed as table-top model
  • Parallel guided downward swinging door (user protected from heat radiation)
  • Gas spring dampers provide for easy door opening and closing
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
 °Cwdhin lWDHload kWconnection*in kgto Tmax2
N 7/H128025025014098006506003.01-phase60180
N 11/H1280250350140118007506003.51-phase70180
N 11/HR1280250350140118007506005.53-phase170120
N 17/HR1280250500140178009006006.43-phase190120
N 31/H12803503502503110401100134015.03-phase210105
N 41/H12803505002504110401250134015.03-phase260120
N 61/H12803507502506110401500134020.03-phase400120
N 87/H128035010002508710401750134025.03-phase480120
1Heating only between two phases *Please see page 73 for more information about supply voltage
2If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.

Accessories for Annealing Hardening and Brazing

Our wide selection of chamber furnaces for annealing, hardening and brazing can be extended with a variety of accessories to suit your application. The accessories shown below represent only a small fraction of the products available. For further details, please see our separate catalogues for heat-treatment furnaces and hardening accessories.

Annealing Boxes

  • Annealing boxes with or without protective gas connectors, up to 1100 °C, also in a tailor-made variant for cold evacuation, for instance for the annealing of small parts and bulk goods

Annealing Tray with Holder

  • Annealing tram with alloy bag and holder with protective gas connection for models N 7/H to N 87/H for annealing and hardening under protective gas and quenching in air

Hearth Plates

  • Hearth plates for up to 1100 °C for protection of the furnace floor for models N 7/H to N 87/H, edged on three sides

Hardening Tongs

  • Hardening tongs in various sizes and forms for use in annealing and hardening

Heat Treating Foil

  • Heat treating foil for wrapping of samples for oxidation-free annealing and hardening of steels up to 1200 °C


  • Heat-resistant gloves to 650 °C or 700 °C for protection of operator during loading