Electrically-Heated Box Furnace


No. 863 is an electrically-heated 1400°F(~760°C) box furnace from Grieve, currently used for preheating molds. 52 KW are installed in nickel chrome wire coils supported by a stainless steel frame. A heat resisting alloy recirculating blower is powered by a 7½ HP motor with a V-belt drive. The blower provides upward airflow to the oven. Workspace dimensions are 30” wide x 48” deep x 30” high.

The unit has 7” thick insulated walls with stainless steel covers. The oven was specially built with inert atmosphere construction. This consists of a continuously welded outer shell, high temperature door gasket, sealed heater terminal boxes, inert atmosphere inlet and inert atmosphere outlet.

Controls onboard No. 863 include a motor-operated vertical lift door and a 4-point strip chart recorder.


  • used for preheating molds
  • dimensions are 30” wide x 48” deep x 30” high
  • 7” thick insulated walls
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