L&L Special Furnace Co. Inc. shipped a dual-chamber heat-treating furnace to a southeastern U.S. manufacturer of various items used in the production of heavy equipment and transportation devices. The box furnace will be used to heat treat the tooling used to manufacture these items. Its top chamber, which has an effective work zone of 16 inches wide x 16 inches high x 32 inches deep, is used to harden tool steels. Its bottom chamber, which has an effective work zone of 14 inches wide x 14 inches high x 32 inches deep, is used for tempering, stress relief and preheating.
The top chamber has a uniformity of ±20°F above 1200°F, and the bottom chamber has a uniformity of ±10°F from 300°F to 1250°F. The furnace is controlled by Eurotherm temperature controls with over-temperature protection. Solid-state relays drive the electric heating elements and include heavy-duty, long-lasting 11-gauge thermocouples.