bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters

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Bolt Cartridge Heaters, Bolt Heaters

Bolt Heater with Conduit Box and Power Cord

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 1400F (760C) on Incoloy sheath
  • Part temperatures to 1000F
  • (540C) 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

Specifications:

The hole diameter should be as close to heater diameter as possible, but within approximately 1/16 (.062) clearance for insertion applications. Close tolerance permits maximum heat transfer and prolonged heater life.

Additional Options:

Typical sizes for electric bolt heaters include: .250, .375, .438, .500, .550, .688, .781, .813, .938, 1, and 1.250. If you do not see the size you need here, contact us and we will make it for you.

Applications:

  • Power Plants
  • Ship Yards
  • Press and Die Manufactures
  • Constructions Contractors
  • Boiler Manufactures

Bolt Cartridge Heaters Selection Guide

The key questions which need to be answered before selecting a cartridge heater for your application are:

  • How much wattage is required?
  • What voltage will be used?
  • What is the heated length? What is the overall length?
  • How long are the heater leads or what is the lead length required?
  • What is the dimentions of the cartridge heater?
  • What is the ambient temperature the cartridge heater will see?
  • What is the maximum temperature required from the heater?
  • How quickly do you want to reach your operating temperature or set point in hour/minutes?
  • What is the type and weight (in lbs.) of the material you want to heat?
  • Special Modifications





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Our industrial electric cartridge heaters including metric and imperial heaters...

Consists of the following cartridge/insertion heater categories:

bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Standard imperial and metric round cartridge heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Medium watt density cartridge heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  High watt density cartridge heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Split sheath cartridge heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Square cartridge heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Small diameter/miniature pencil heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Bolt cartridge heaters
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Custom cartridge/insertion heaters

Applications for the above include:

bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Cartridge Heaters for-Extrusion Dies, Liquid Immersion
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Metric Heaters for-Plastic Molds and Injection Molding
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Insertion Heaters for-Plastics Extrusion
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Custom Cartridge Heaters for-Packaging Machinery, Labeling and Sealing
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Square and Round Cartridge Heaters for-Hot Plates and Platens, Hot Stamping
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Cartridge Heaters for-Hot Runner Molds, Various Types of Dies
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Insertion Heaters for- Medical Equipment and Other Industrial Applications

The square cartridge heater configuration simplifies wiring and installation while optimizing performance in a wide range of solid, liquid, and gas heating applications. Tooling applications are particularly well served by the square cartridge heater approach. Typical square cartridge heating applications include platens, molds, sealing bars, sealing plates and dies. Versatile slot style mounting simplifies installation in small tooling components such as bushings and nozzles and is particularly useful when leads must exit at a specific location on the component surface.

Some applications demand much longer heater life, that is where miniature small diameter pencil/cartridge heaters have immense application value. Life expectancies of five, seven or even ten years are not unreasonable for some mission-critical applications:


bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Blood warmers used in medical theaters must never fail
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Battery conditioners for EVA spacesuits on the International Space Station must last ten years      before replacement, due to payload costs
bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters  Here on earth, high throughput semiconductor chip testers must operate without significant      downtime for the 5 year life of the equipment. For these applications, a service life of 50,000 to      90,000 hours is a requirement that is both reasonable and attainable.

Some common issues with most standard cartridge heaters are as follows:

Heater removal: a cartridge heater will oxidize after many hours of operation and maybe difficult to remove. Consider drilling a through hole so the heater can be hammered out or choose a split sheath cartridge heater.

Lubricants: like graphite or silicone facilitate the insertion of the cartridge heater but can carbonize at higher temperature and then the heater will be really stuck.

The NPH split sheath cartridge heateris designed especially for platen, die or mold industrial heating applications where the holes are poorly drilled or worn through age. Independent expansion of each section of the split sheath cartridge heater when energized, creates intimate contact with the wall of the hole.

Through the patented split-sheath design and highly specialized manufacturing techniques, NPH split sheath insertion heaters reduce your total cost of process heating by an average of 40% over other heaters.

NPH’s split sheath cartridge heaters use a unique, patented split-sheath design that expand when energized to maximize heat transfer through greater contact with the wall of the bore. Better heat transfermeans less power is consumed to maintain the set point temperature, reducing operating costs.

Bolt cartridge 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.



bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters bolt cartridge heaters, bolt heaters, cartridge heaters, custom bolt heaters

Telephone: 905-859-8225        Facsimile: 905-859-4691

sales@nphheaters.com

Toll Free: 1-877-674-9744