Birk Manufacturing is a leading thermal partner throughout the heat processing industry. Birk’s cartridge heaters are known for their extremely high surface loading that allows large power to be delivered where space is extremely limited. A cartridge heater is a tube-shaped heating element that can be inserted into drilled holes. Cartridge heaters provide localized and precise heating. These cartridge heaters are manufactured with a resistance coil wound around a ceramic core. This core is then surrounded by dielectric and encased in a metal sheath. Powered heat transfer through the coil to the sheath causes the sheath to heat up. This heat transfer then heats the inside metal part that requires an elevated temperature.

If purchasing one of Birk’s 1/8” swaged in-stock cartridge heaters, the fit/drilled hole size for a small 1/8 inch cartridge heater is integral to the overall operation and heater lifespan. In a low or medium temperature application (315°C (660°F) or below), holes can be drilled to .008” over the nominal size of the drill, resulting in fits of .014”. While this fit will be looser and does not permit optimal heat transfer, it aids in the installation and removal of the cartridge heaters, especially those with longer sheaths. At high watt densities, a close fit is much more critical. The holes should be drilled and then reamed. With a tighter fit, the heater will run cooler and have a longer life span.

Birk’s 1/8 inch cartridge heaters are a great solution for reaching elevated temperatures. This in turn suggests that incorporating a temperature sensor and controlling feature would be best for the overall application. Birk has a vast temperature sensor product offering along with direct access to design engineers who will be able to advise customers whether or not to integrate a surface mount or bolt-on RTD or thermocouple.

In some applications, an embedded temperature sensor or higher watt density is required. This can be achieved with a custom cartridge heater solution. Custom cartridge solutions allow Birk’s customers to achieve their thermal needs even in the most challenging applications.

The following are technical specifications and capabilities for our Cartridge Heaters:

1/8 inch Swaged / Small Cartridge Heater
Bore size is 0.125” +0.0005” / -0.0000”
Offered in 1”, 1.25”, or 2” cartridge lengths
Max temperature: 600°C
24 and 48 DC voltage available with multiple wattage options to meet your application needs.
Standard cartridge heaters have 18” 26 AWG Teflon stranded leads.

Part Number	Dimension A (in)	Wire Guage	Operating Voltage	Wattage	Watt Density	Resistance	RFQ
1100	1.00	26	24	25	125	23.04	RFQ
1101	1.00	26	24	50	250	11.52	RFQ
1102	1.00	26	48	25	125	92.16	RFQ
1103	1.00	26	48	50	250	46.08	RFQ
1104	1.25	26	24	37.5	125	15.36	RFQ
1105	1.25	26	24	75	250	7.68	RFQ
1106	1.25	26	48	37.5	125	61.44	RFQ
1107	1.25	26	48	75	250	30.72	RFQ
1108	2.00	26	24	75	125	7.68	RFQ
1109	2.00	26	48	75	125	30.72	RFQ
1110	2.00	26	48	150	250	15.36	RFQ

3-D Printing industry: Nozzle heaters for extrusion dies, hot runner systems, filter changing equipment

Apparatus construction & laboratories: Hot plates, industrial baths, distillation plants, soldering baths, oil sumps and heating, sterilizing baths, oil economizers

Medical technology: Inhaling devices & sterilizers, polymerization devices, dialysis equipment

General machine construction: Small air heaters, expansion screw heating, book binding machines, cold compressors

Birk specializes in "engineered solutions," not standard products you can get elsewhere. Our design team thrives on developing innovative solutions to complex problems. Our continuous implementation of lean processes allows us to deliver prototypes in days or weeks, where others quote months. Each thermal system is custom-designed to meet the specific requirements of your project.

Manufactured under DIN ISO EN 9001 standards