• BoltHeater

Bolt Heaters

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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, allowing further tightening of the nut. 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 the surrounding bolt.

Typical Applications:

  • Cylinders
  • Die blocks
  • Turbines
  • Engine heads
  • Large compressors
  • Presses
  • Pressure vessels

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Bolt Heaters How to Order

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Insert Length A Heated Length B Diameter C Cold End D Cold End E Max. Bolt Heater Hole Dia.
18" 12” 0.533” 1 1/8" 6 7/8" 0.616”
24" 18” 0.533” 1 1/8" 6 7/8" 0.616”
30" 24” 0.533” 1 1/8" 6 7/8" 0.616”
36" 30” 0.533” 1 1/8" 6 7/8" 0.616”
18" 12” 0.660” 1 1/8" 6 7/8" 0.735”
24" 18” 0.660” 1 1/8" 6 7/8" 0.735”
30" 24” 0.660” 1 1/8" 6 7/8" 0.735”
36" 30” 0.660” 1 1/8" 6 7/8" 0.735”
18" 12” 0.730” 1 1/4" 6 3/4" 0.860”
24" 18” 0.730” 1 1/4" 6 3/4" 0.860”
36" 30” 0.730” 1 1/4" 6 3/4" 0.860”
48" 42” 0.730” 1 1/4" 6 3/4" 0.860”
60" 54” 0.730” 1 1/4" 6 3/4" 0.860”
24" 18” 0.885” 1 1/4" 6 3/4" 0.985”
30" 24” 0.885” 1 1/4" 6 3/4" 0.985”
42" 36” 0.885” 1 1/4" 6 3/4" 0.985”
48" 42” 0.885” 1 1/4" 6 3/4" 0.985”
42" 36” 0.980” 1 1/4" 6 3/4" 1.110”
54" 48” 0.980” 1 1/4" 6 3/4" 1.110”