Bolt Cartridge Heaters, Bolt Heaters

 

Bolt heaters are used to tighten large bolts that secure heavy machinery and equipment. The shaft of the heater is inserted into the hollow bolt and energized to expand it, which allows further tightening of the nut. Manufactured with a high watt density, they heat up in just a few minutes, resulting in cost savings on reduced man hours removing nuts from bolts and studs. Large bolts can be heated to full expansion in just a few minutes. This heater design is manufactured with specific diameter sheaths to fit industry standard hollow bolts. High watt densities with special heated lengths distribute heat evenly to surrounding bolt. 

 

Features:

•     Part temperatures to 1400°F (760°C) on Incoloy sheath
•     Part temperatures to 1000°F
•     (540°C) on optional stainless steel sheath
•     Nickel-chromium resistance wire, precisely wound and centered in the unit, assures even, efficient distribution of heat to the sheath
•     Conductor pins metallurgically bonded to the resistance wire ensure trouble-free electrical continuity
•     Magnesium oxide insulation of specific grain and purity, swaged to the proper density, results in high dielectric strength and contributes to faster heat-up
•     Incoloy sheath resists oxidation and corrosion from many chemicals, heat and atmospheres
•     Minimal spacing between the element wire and sheath results in lower internal temperature, giving you the ability to design with fewer or smaller heaters that operate at higher watt densities