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Cartridge Heater With Convoluted Condiut
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Cartridge Heater with Swaged In Leads
Cartridge Heater With Swaged In Leads
Cartridge Heater With Convoluted Condiut
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Cartridge Heater with Swaged In Leads
Cartridge Heater With Swaged In Leads

Swaged Cartridge Heaters (HotRods)

The engineers at Backer Marathon have developed a swaged cartridge heater that exceeds the performance and durability of others in the industry.

Through refinements in the swaging process, specially designed cores, careful selection of magnesium oxide fill, nickel chromium resistance wire, stainless steel tubing, and carefully controlled production processes, HotRod cartridge heaters routinely outperform other heaters in difficult applications.

HotRod cartridge heaters are available in a wide variety of diameters and configurations. Choose from our 14,000+ stock heaters for immediate delivery or let the engineers at Backer Marathon design a unique cartridge heater for your special application. Standard manufacturing times are normally less than 2 weeks.

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Cartridge Heater Watt Density

  • The tighter the hole fit, the better. Loose fit equals poor heat transfer and shorter heater life.
  • Clearance is determined by taking the hole diameter and subtracting the heater diameter. 
  • Cycling reduces heater life and high cycling applications should use lower numbers. 
  • Please consult the following table for the maximum allowable watt density for heating metals. 

Formula 

Watt density is calculated with the following formula:

Watt Density = Wattage / Heated Length x Diameter x 3.14

Maximum Watt Density for Heating Metals

Hole Clearance 1200°F 1000°F 800°F 600°F 400°F 200°F
0.002 140 270 300 300 300 300
0.003 120 205 295 300 300 300
0.004 100 175 240 300 300 300
0.005 90 145 200 285 300 300
0.007 70 100 150 200 250 300
0.010 60 90 110 150 200 225
0.015 50 75 95 110 140 165
0.030 40 60 80 90 100 110
0.060 30 40 50 55 65 65
0.100 25 35 45 50 50 50

Maximum HotRod Watt Density In 200°F Moving Air

  Air Velocity, Feet per Minute                  
Air Direction 0 500 1000 1500 2000 2500 3000 3500 4000  
Parallel to Heater 44 52 56 60 64 67 72 75 78  
Perpendicular to Heater 44 68 76 82 86 93 97 103 108  

Maximum HotRod Watt Density In Still Air

  100°F 250°F 500°F 750°F 1000°F 1100°F 1200°F 1300°F 1400°F
Max Watts/in2 53 52 50 46 40 35 28 20

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HotRod Sheath Temperature In 70°F Still Air

  Watt Density (watts/in2)              
  5 10 15 20 25 30 35 40
Oxidized Sheath 450 800 1050 1100 1200 1300 1350 1400
Non-Oxidized Sheath 750 1000 1150 1300 1400 1500 1600 1650

Stock Parts

1 - 20 of 14800 Filter Results
Part No. Diameter Watts Volts Length Available Qty Price
HR10035A 1.000 inches 600 watts 240 volts 3.50 inches 24 Sign In for Pricing
HR10035D 1.000 inches 600 watts 240 volts 3.50 inches 11 Sign In for Pricing
HR10035E 1.000 inches 600 watts 240 volts 3.50 inches 9 Sign In for Pricing
HR25010H 0.250 inches 55 watts 120 volts 1.00 inches 1 Sign In for Pricing
HR25010J 0.250 inches 100 watts 120 volts 1.00 inches 0 Sign In for Pricing
HR25010K 0.250 inches 100 watts 240 volts 1.00 inches 0 Sign In for Pricing
HR25010L 0.250 inches 150 watts 120 volts 1.00 inches 18 Sign In for Pricing
HR25012F 0.250 inches 100 watts 120 volts 1.25 inches 15 Sign In for Pricing
HR25012G 0.250 inches 150 watts 120 volts 1.25 inches 0 Sign In for Pricing
HR25012H 0.250 inches 150 watts 240 volts 1.25 inches 3 Sign In for Pricing
HR25012T 0.250 inches 75 watts 120 volts 1.25 inches 9 Sign In for Pricing
HR25015AU 0.250 inches 150 watts 240 volts 1.50 inches 3 Sign In for Pricing
HR25015K 0.250 inches 100 watts 120 volts 1.50 inches 6 Sign In for Pricing
HR25015L 0.250 inches 150 watts 120 volts 1.50 inches 21 Sign In for Pricing
HR25015M 0.250 inches 200 watts 120 volts 1.50 inches 0 Sign In for Pricing
HR25015N 0.250 inches 200 watts 240 volts 1.50 inches 3 Sign In for Pricing
HR25015Y 0.250 inches 200 watts 240 volts 1.50 inches 17 Sign In for Pricing
HR25017B 0.250 inches 200 watts 240 volts 1.75 inches 5 Sign In for Pricing
HR25020AC 0.250 inches 200 watts 240 volts 2.00 inches 0 Sign In for Pricing
HR25020AX 0.250 inches 40 watts 120 volts 2.00 inches 7 Sign In for Pricing
1 - 20 of 14800 Filter Results
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