Chromalox CBH-4258 Electric Stud Heater

Chromalox CBH-4258 Electric Stud Heater is a 240 V, 5,300 W cartridge heater designed to heat large studs or bolts by inserting into drilled holes, enabling controlled expansion and shrink‑fit assembly. As part of Chromalox’s CBH Electric Stud Heater family, it employs a rugged tubular heating element inside a metal sleeve for durable service and reliable heat transfer. CBH units are offered in lengths from 18 to 60 inches and are stocked in 240 V variants, with the CBH-4258 specifically targeting 240 V, 5,300 W applications. Typical industrial uses include heating large bolts, studs, and related components in engines, cylinders, die blocks, pumps, pressure vessels, turbines, and other heavy equipment, where multiple heaters are often used in banks to achieve uniform heating and accurate mating‑part alignment. In practice, CBH heaters heat fasteners to permit expansion for installation and then tighten as they cool to produce a shrink‑fit joint, a method widely employed in demanding assemblies such as large compressors, presses, and turbines. The design is intended for insertion into drilled holes to heat metal parts with predictable heat transfer, supporting repeatable results in challenging industrial environments.