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Non Swaged Heater
Standard Construction Non Swaged Heater
Non Swaged Heater With 3 Zone Construction
Non Swaged Heater With 3 Zone Construction
Non Swaged Heater With Brass NPT
Non Swaged Heater With Epoxylite Potting
Non Swaged Heater With Locating Ring
Non Swaged Heater With RTV Potting
Non Swaged Heater With Stainless Steel NPT
Non Swaged Heater
Standard Construction Non Swaged Heater
Non Swaged Heater With 3 Zone Construction
Non Swaged Heater With 3 Zone Construction
Non Swaged Heater With Brass NPT
Non Swaged Heater With Epoxylite Potting
Non Swaged Heater With Locating Ring
Non Swaged Heater With RTV Potting
Non Swaged Heater With Stainless Steel NPT

Non-Swaged Cartridge Heaters

Non-swaged cartridge heaters offer a cost effective solution where the performance of a swaged heater is not required. Non-swaged heaters can be used at watt densities up to 45 watts per square inch and temperatures up to 1000°F. Non-swaged heaters offer tighter length tolerances than swaged heaters. Non-swaged heaters can be built with 3 independent heat zones. Non-swaged heaters are not recommended for applications where there is a lot of vibration or impact.

Construction

  • Standard leads are UL rated to 550°C (1022°F) and are connected internally with nickel connectors.
  • High temperature cement filling protects leads and internal parts. Epoxy and silicone rubber leads are available.
  • Nickel-Chromium resistance wire stretched evenly throughout the length for even heat distribution.
  • High purity MgO is vibratory filled into the heater for maximum heat transfer.
  • 304 Stainless Steel sheath for superior oxidation resistance.
  • Welded end disc to prevent contamination and moisture absorption.

Standard Non-Swaged Cartridge Heater Specifications

Nominal Diameter Minimum Diameter Maximum Diameter Std. Lead Wire Gauge Max Amps with Std. Lead Wire Max Lead Wire Gauge Maximum Amps Maximum Volts
3/8" .365 .375 22 9 18 15 480
1/2" .490 .500 22 9 18 15 480
5/8" .615 .625 18 9 16 25 600
3/4" .740 .750 18 15 16 20 600
1" .990 1.000 18 15 16 20 600

 

Applications

Non-swaged heaters offer tighter length tolerances than swaged heaters, making them ideal for applications such as platens where heaters are generally longer. Non-swaged heaters are not recommended for applications where there is is a lot of vibration or impact.

 

Options

Most of the lead configurations and options available for swaged HotRod heaters are also available for non-swaged cartridge heaters. Our standard options are listed below. If you don't see what you need, consult your Backer Marathon agent for more information or contact us at sales@backermarathon.com

  • Fittings - flanges, brass NPT, stainless NPT, tab stops, locating rings
  • End Seals - RTV, cement, epoxy, epoxylite
  • Other Options - distributed wattage, dual voltage, multi-zone, three phase

 

Watt Density

Formula

Watt density is calculated with the following formula: 

Watt Density = Wattage / Heated Length x Diameter x 3.14


Clearance

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.
  • Staying below these values will result in increased heater life.

Non-Swaged Cartridge Heater Watt Density

Hole Clearance 1000* 800* 600* 400* 200*
0.003 25 30 35 40 45
0.005 20 25 30 35 45
0.010 20 23 28 30 38
0.015 18 20 25 27 34
0.030 16 15 20 23 30
0.100 10 12 15 20 25

*Block temperature in degrees Fahrenheit