Chamber Furnaces to Preheat Molds and Tools

Heating elements on support tubes ensure free heat radiation and a long service life.

Process Control

Function and equipment

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These universal chamber furnaces with radiation heating have been specifically designed to withstand heavy-duty use in the tool shop and industry. They are particularly useful for processes such as tool making or for hardening jobs, e.g. annealing, hardening and forging. With help of various accessories, these furnaces can be customized to every application requirements.

  • Compact, robust design  construction with double-walled housing
  • Door can be opened when furnace is hot
  • 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 (models N 81/.. - N 641/.. also with side SiC plates)
  • Stainless steel upper door jamb protects furnace structure when furnace is opened hot up to model N 87/H. Models N 81/... - N 641/.. with compact stainless steel door.
  • Temperature uniformity up to +/− 10 °C according to DIN 17052-1
  • Low energy consumption due to multi-layer insulation
  • Base frame included in the delivery, N 7/H - N 17/HR designed as table-top model
  • Exhaust opening in the side of the furnace, or on rear wall of chamber furnace in the N 31/H models and higher
  • Parallel swinging door (user protected from heat radiation) up to N 87/H guided downwards, from N 81 guided upwards 
  • Door movement cushioned with gas dampers/struts
  • Heat resistant zinc paint for protection of door and door frame (for model N 81 and larger)
  • Over-temperature limiter with adjustable cutout temperature as temperature limiter to protect the furnace and load
  • Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumino silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive
  • Controller with touch operation B500 (5 programs with 4 segments each)
  • Freeware NTEdit for convenient program input via ExcelTM for WindowsTM on the PC
  • Freeware NTGraph for evaluation and documention of firings using ExcelTM for WindowsTM on the PC
  • MyNabertherm App for online monitoring of the firing on mobile devices for free download

Additional equipment

  • Side heating elements protected with SiC tiles
  • Thermocouple inlet with a diameter of 15 mm in the side
  • Pneumatic door opening, controlled by foot pedal
  • Protective gas boxes for heat treatment under non-flammable protective and reaction gases
  • Gas feed fittings
  • Charging devices
  • Charge control 
  • Process control and documentation via VCD software package for monitoring, documentation and control

Technical specifications

Model

Tmax

Inner dimensions in mm

Volume

Outer dimensions4 in mm

Heating

Electrical

Weight

 

°C

w

d

h

in l

W

D

H

power in kW3

connection

in kg

N 7/H1

1280

250

250

140

9

800

650

600

3.0

1-phase

60

N 11/H1

1280

250

350

140

11

800

750

600

3.5

1-phase

70

N 11/HR1

1280

250

350

140

11

800

900

600

5.5

3-phase2

70

N 17/HR1

1280

250

500

140

17

800

900

600

6.4

3-phase2

90

            

N 31/H

1280

350

350

250

30

1040

1030

1340

15.0

3-phase

210

N 41/H

1280

350

500

250

40

1040

1180

1340

15.0

3-phase

260

N 61/H

1280

350

750

250

60

1040

1430

1340

20.0

3-phase

400

N 87/H

1280

350

1000

250

87

1040

1680

1340

25.0

3-phase

480

            

N 81

1200

500

750

250

80

1300

2000

2000

20.0

3-phase

950

N 161

1200

550

750

400

160

1350

2085

2300

30.0

3-phase

1160

N 321

1200

750

1100

400

320

1575

2400

2345

47.0

3-phase

1570

N 641

1200

1000

1300

500

640

1850

2850

2650

70.0

3-phase

2450

            

N 81/13

1300

500

750

250

80

1300

2000

2000

22.0

3-phase

970

N 161/13

1300

550

750

400

160

1350

2085

2300

35.0

3-phase

1180

N 321/13

1300

750

1100

400

320

1575

2400

2345

60.0

3-phase

1600

N 641/13

1300

1000

1300

500

640

1850

2850

2650

80.0

3-phase

2500

1Table-top model
2Heating only between two phases
3Depending on furnace design connected load might be higher
4External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.

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