Bolt Heaters

Bolt Heaters

Thermalfold Bolt Heaters

Thermalfold Bolt Heaters Heaters are used as an aid to tighten large bolts in heavy machinery and equipment. When inserted into a drilled hole in the bolt, the Thermalfold Bolt Heater rapidly heats the bolt, causing expansion and increasing the bolts length. This allows the nut to be further tightened. When the heater is switched o­ and removed, the bolt begins to cool and contracts to its original length, ensuring an extra tightened assembly.

Thermalfold Bolt Heaters are of a unique design and can be used in holes which have been drilled up to 0.5mm larger than the bolt heater diameter. When energised, the elements heat up and spring open due to their folded construction. This ensures a quick heat transfer to the bolt. While in the heated condition they are a snug ‑t and impossible to remove. On cooling, Thermalfold Bolt Heaters contract back to their original diameter and become very easy to remove. Conventional bolt heaters will fail under these conditions. A roll compacted high grade stainless steel construction enables a maximum heater temperature of 600°C giving a faster heat up time, with minimum heat transfer or loss to the area surrounding the bolt.

Bolt heaters are used in industries such as building and construction, boiler manufacturing, power plants, mining, shipyards, large machine and die manufacturers. Typical applications include large compressors, turbines, pressure vessels, steam generators, engine heads, large cylinders and die blocks.