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Cartridge Heaters - All applications must consider fit tolerance, the correct watt density and appropriate terminal connections.
Call ASB Heating Elements Ltd., for Technical Assistance: 1-800-265-9699
Cartridge Heaters
Cartridge Heaters are uniquely designed to fit into metal blocks, dies, platens, molds etc.
Features Include:
- precisely concentrate the heat where it is needed
- ideally suited to digital temperature control systems
- low capital cost
- wide selection of:
- diameters and lengths, up to 60" long
- wattages and watt densities
- terminations
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Crimped-On Leads
A high temperature double crimp connects the MGT (450ºC) leads to solid nickel pins. This construction is recommended for applications with elevated temperatures. Due to the rigid nickel pins,. this construction is not recommended in applications where movement or flexing is encountered, or if sharp bends are required adjacent to the heater exit.
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Swaged-In Leads
High temperature MGT (450ºC) wire is internally connected and swaged in place. This construction is recommended for applications in which the leads must be bent at the exit point from the heater and where mild lexing may be found. For applications with continuous or more severe movement, we would recommend metal braid or armor cable.
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Stainless Steel Braid
High temperature MGT (450ºC) wire is internally connected and swaged in place. This construction offers protection against abrasion and sharp edges. This is a very strong construction which offers full length flexibility. this construction is recommended in applications with flexing and where the leads must pass through metal openings or routed along metal components.
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Stainless Steel Hose (Armor Cable)
High temperature MGT (450ºC) wire is internally connected and swaged in place. This construction is recommended for applications in which the leads are subjected to abrasion or run the risk of being pinched. this is the strongest lead protection available and works well in moving or flexing applications.
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Right Angle Fiberglass Leads
High temperature MGT (450ºC) leads exiting at right angle to the sheath. This construction offers a compact design where space is limited. This construction is not recommended where abrasion or flexing is present.
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Right Angle Stainless Steel Braid
Stainless steel braid over high temperature MGT (450ºC) wire exiting at right angle to the sheath. This construction is recommended in applications with flexing and where the leads must pass through metal openings or routed along metal components. This construction is desirable when space is limited and it is not feasible to bend standard leads.
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Right Angle Stainless Steel Hose
(Armor Cable)
Stainless steel hose over high temperature MGT (450ºC) wire exiting at right angle to sheath. This is the strongest lead protection for use in applications where severe abrasion is present. These l;eads offer good flexibility and are good for moving or flexing applications.
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Heater Diameter
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Minimum Unheated Length
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1/8"
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Not Available
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1/4"
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1"
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5/16"
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1 1/2"
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3/8"
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1 1/2"
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1/2"
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1 1/2"
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5/8"
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1 9/16"
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3/4"
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1 7/8"
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15/16"
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1 7/8"
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1"
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1 7/8"
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Single or Double Threaded Fittings
Single or double threded fittings attached to sheath to allow for installation into threded holes.
Fitting Materials
- Brass, Steel and Stainless Steel
Leadwires
- Fiberglass for high temperature applications
- Teflon for moisture protection
- Stainless Braid or Hose for flexing applications
and abrsion protection.
Terminal Boxes
- General purpose and moisture resistant housing
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Heater Diameter
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NPT Size
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X Dimension
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Y Dimension
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Y1 Dimension
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1/4"
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1/8 - 27
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3/8"
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3/16"
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1/4"
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3/8"
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1/4 - 18
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1/2"
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3/16"
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1/4"
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1/2"
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3/8 - 18
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9/16"
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1/4"
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1/4"
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5/8"
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1/2 - 14
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5/8"
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1/4"
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5/16"
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3/4"
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3/4 - 14
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3/4"
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1/4"
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3/8"
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7/8"
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1 - 11 1/2
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3/4"
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1/4"
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3/8"
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1"
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1 - 11 1/2
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3/4"
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1/4"
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3/8"
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1 1/4"
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1 1/4 - 11 1/2
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7/8"
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5/16"
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1/2"
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Mounting Flanges
Mounting flanges are recommended for applications where vibration or movement may cause the heater to be disloged from its hole. Stainless steel flanges are available in a variety of sizes and configurations. The standard flange is round and is supplied with two mounting holes. For heaters 5/8" diameter and under, the flange would be 1 1/2" in diameter. For larger diameter heaters the standard flange would be 2.00" in diameter.
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Internal Thermocouples
Internal thermocouples are built into the heater assembly to monitor the internal or sheath temperatures. These are useful as high limit devices or in applications where space is at a premium. The power and sensor leads exit the sheath together and can be ordered with a variety of lead protections. Not all thermocouple configurations are available on smaller diameter heaters. Type J and K calibrations are standard for the shown constructions.
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Grounded at Disc End
The thermocouple junction is grounded to the disc end of the heater. This construction is commonly used in hot runner applications. The disc end can be filled with silver solder and ground flat. This will ensure good contact when inserted into a flat end blind hole.
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Ungrounded at Disc End
The thermocouple junction is ungrounded and is located just behind the disc end. This will give a reference temperature of the part being heated.
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Grounded at Center
The thermocouple junction is grounded to the sheath along the length of the heater. The standard location is at the center of the heater, but can be located anywhere along the lenght of the sheath. This construction will provide a quick response.
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Ungrounded at Center
The thermocouple junction is ungrounded and is centered in the diameter of the sheath. The standard location is at the center of the heater, but can be located anywhere along the length of the sheath. Typically used as a high limit in air or vaccum applications
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