Cartridge Heater Sizes

All Watt-Flex cartridge heaters are built-to-order to match your heating and size requirements. Available sizes for cartridges are listed below.

Watt-Flex heaters eliminate the need for a tight fit. When selecting the right diameter for the bore in your application, keep in mind that the recommended fit for a Watt-Flex diameter is .007" larger than the nominal diameters shown.

For custom sizes and special heating applications, call and talk to one of our heating specialists at (978) 356-9844.

We have designed and built high-watt heaters for use across a wide variety of industries and process heating applications such as molds and dies, plastics, package sealing, and liquids in automotive, plastics, composites, aerospace, food service, and more.

Watt-Flex Cartridge Heater Dimensions

Available
Diameters

Nominal Diameters (1)

Standard Cold Section at Terminal End

Min - Max (2)Lengths

1/4”

0.245”

5/16”

1”- 22”

3/8”

0.370”

3/8”

1 1/2” - 36”

1/2”

0.495”

5/8”

2” - 50"

5/8”

0.620”

5/8”

2 1/2” - 72”

11/16”

0.683”

5/8”

3 1/2” - 64”

3/4”

0.745”

5/8”

3 1/2” - 90”

1"

0.9925"

1”

8” - 60”

  8.0 mm

 7.875 mm

 8.000 mm

38 - 660 mm

10.0 mm

 9.875 mm

 9.500 mm

38 - 915 mm

12.0 mm

11.875 mm

15.875 mm

  50 - 1140 mm

12.5 mm

12.375 mm

15.875 mm

  50 - 1140 mm

15.0 mm

14.875 mm

15.875 mm

  65 - 1250 mm

16.0 mm

15.875 mm

15.875 mm

  65 - 1775 mm

20.0 mm

19.875 mm

15.875 mm

100 - 1825 mm

25.0 mm

24.87 mm

24.5 mm

  200- 1525 mm

 

 

 

 

(1) Tolerances: ±.002" ( 1/4" to 3/4"); ±.0025 (1" );  ±.05mm (8mm-20mm); ±.06mm (25mm)

(2) Tolerances: ± 3% with 3/32"minimum; ±2% above 20 " (500 mm)