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Bench Furnaces

Bench furnace picture

BULLETIN
BF-710

ELECTRIC
HEAT TREATING
FURNACES


 

Grieve standard 2000°F and 2200°F Bench Furnaces provide for a variety of heat treating applications. Precision microprocessor based temperature controls and energy-saving insulation maximize the cost efficiency and performance of these rugged units. Five sizes from 0.44 to 2.0 cubic feet. Ideal for general purpose heat treating of tools, dies and other parts.

STANDARD FEATURES Back to Top
Controls
—Digital, microprocessor based, thermocouple actuated, indicating temperature controller
—On-off heat switch
—LED pilot lights



Safety Equipment — Electric Furnace
—Adjustable, thermocouple actuated, manual reset excess temperature interlock
—Separate heating element control contactor
—Door interlock switch turns off power to heating elements when door is opened; restores    power when door is closed



Construction
—Heavy gauge aluminized steel cabinet with enamel finish
—Brushed stainless steel control panel face
—Gas spring assisted manually operated vertical lift door
—Door hot side faces away from operator at all times
—High temperature alloy wire heating elements supported by rugged ceramic plates
—Energy-saving lightweight ceramic fiber insulation reduces operating costs
—Fast heat-up
—Heating elements located on sidewall and roof for excellent temperature uniformity
   throughout work space
—Ceramic hearth tray
—1 year limited warranty


All equipment fully assembled and individually factory tested

 

   
SPECIFICATIONS Back to Top
NOT FOR USE WITH FLAMMABLE SOLVENTS, VAPORS OR GASES
Model
Work Space
Outside
Dimensions
(WxDxH)
Max
Temp
Insu-
lation
Height
w/Door
Open
Heat Input
KW
Operating Characteristics
Approx
Shipping
Weight
Dimensions
(WxDxH)
Volume
Cu Ft
230V
460V
Control
Accuracy
Furnace
Uniformity
Rise Time
230V 460V
BF-8128 8" x 12" x 8" 0.44 24" x 31" x 31" 2000°F 5" 52" 4.5 6 ± 0.3% ±15°F 65 min 50 min 400 lbs
BF-8128-HT 8" x 12" x 8" 0.44 26" x 33" x 33" 2200°F 6" 54" 4.5 6 ± 0.3% ±20°F 75 min 55 min 485 lbs
BF-12128 12" x 12" x 8" 0.67 28" x 31" x 31" 2000°F 5" 52" 6 8 ± 0.3% ±15°F 55 min 45 min 450 lbs
BF-12128-HT 12" x 12" x 8" 0.67 30" x 33" x 33" 2200°F 6" 54" 6 8 ± 0.3% ±20°F 80 min 60 min 530 lbs
BF-121212 12" x 12" x 12" 1.0 28" x 31" x 37" 2000°F 5" 66" 7.5 10 ± 0.3% ±12°F 50 min 40 min 500 lbs
BF-121212-HT 12" x 12" x 12" 1.0 30" x 33" x 39" 2200°F 6" 68" 7.5 10 ± 0.3% ±17°F 65 min 50 min 600 lbs
BF-12188 12" x 18" x 8" 1.0 28" x 37" x 31" 2000°F 5" 52" 7.5 10 ± 0.3% ±10°F 65 min 50 min 525 lbs
BF-12188-HT 12" x 18" x 8" 1.0 30" x 39" x 33" 2200°F 6" 54" 7.5 10 ± 0.3% ±15°F 75 min 55 min 625 lbs
BF-121812 12" x 18" x 12" 1.5 28" x 37" x 37" 2000°F 5" 66" 12 16 ± 0.3% ±10°F 45 min 35 min 550 lbs
BF-121812-HT 12" x 18" x 12" 1.5 30" x 39" x 39" 2200°F 6" 68" 12 16 ± 0.3% ±15°F 60 min 45 min 650 lbs
BF-12248 12" x 24" x 8" 1.33 28" x 43" x 31" 2000°F 5" 52" 12 16 ± 0.3% ±10°F 50 min 40 min 625 lbs
BF-12248-HT 12" x 24" x 8" 1.33 30" x 45" x 33" 2200°F 6" 54" 12 16 ± 0.3% ±15°F 60 min 45 min 725 lbs
BF-122412 12" x 24" x 12" 2.0 28" x 43" x 37" 2000°F 5" 66" 15 20 ± 0.3% ±10°F 45 min 35 min 700 lbs
BF-122412-HT 12" x 24" x 12" 2.0 30" x 45" x 39" 2200°F 6" 68" 15 20 ± 0.3% ±15°F 60 min 45 min 800 lbs
    †Accuracy as percent of controller span. Uniformity at 100°F below maximum temperature. Rise Time in minutes to 100°F below maximum temperature. Tests run with empty oven and minimum exhaust. Performance will vary with load, exhaust rate and application. See Bulletin TC-920 for additional details.
STANDARD EQUIPMENT   Back to Top
All Models
— 208 volts, 3-phase, 60 Hz
— 230 volts, 3-phase, 60 Hz
— 460 volts, 3-phase, 60 Hz
— Other electrical characteristics available


Each furnace features completely wired control panel, located under the furnace, enclosing terminals for incoming power, temperature controller, heating element control contactor, excess temperature controller, separate contactor interlocked with
excess temperature controller, 115 volt control circuit transformer, on-off heat switch and red pilot light. Door interlock switch turns off power to heating elements when door is opened. High temperature enamel painted aluminized steel exterior. Ceramic hearth tray rated for 60 lbs distributed loading.




Circulation Diagram

Cross section through work space
(Front View)

 
ADDITIONAL EQUIPMENT AVAILABLE Back to Top

See Bulletin TC-960 for modifications and other optional equipment.

Floor Stand, 26" High, heavy duty steel cabinet with shelf
Option FS


Programmable Temperature Controller, microprocessor based, digital indicating, thermocouple actuated, in lieu of standard controller
Option PTC


Recording Thermometer, thermocouple actuated, 24-hour, 10" diameter circular chart, used in conjunction with standard controller, includes floor stand to house recorder. Floor stand cannot be used for storage
Option RT


Digital Timing Temperature Controller, microprocessor based, digital indicating, incorperates 99 hour 59 minute timer. Starts timing when temperature reaches set point and shuts down oven at end of set time
Option DTS3

Digital Shut Down Timer, with continuous "hold" feature
Option SDT


Digital Batch Timer, for uniformly timing batch operations. Continuous alarm with door interlock; alarm at end of preset time period until door is opened or timer reset
Option BT


Alloy Hearth Tray
7" x 11"
   Option AH812
11" x 11"
   Option AH1212
11" x 17"
   Option AH1218
11" x 23"
   Option AH1224





Quench Tank, carbon steel, 40 gallon capacity, 12" x 20" x 12" deep work basket, subway grating basket support, 1/2 HP direct driven mixer, 23 x 23 x 44 high overall, for 115 or 230/1/60
Option QT

Quench Tank Electric Heater, with temperature control
Option QTH

 
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