Nomex vs Aramid Paper Tubing: Grades, Construction and Selection

Use this family guide to compare identified Nomex paper tubing with broader aramid paper tubing by material identity, grade, winding construction, dimensions, documentation and application requirements. For a project-specific quotation for identified Nomex grades, review our custom Nomex tubing page.

Nomex tubing capability covers IDs of approximately 0.8-60 mm and wall builds of approximately 0.05-0.76 mm. General aramid paper tubing covers IDs of approximately 1-60 mm and wall builds of approximately 0.08-0.51 mm. Exact combinations depend on paper grade, thickness, layers, overlap, roundness, length and electrical requirements.

nomex paper tube

Nomex paper tube and aramid paper tubing

WELLELE supplies custom Nomex paper tube and aramid paper tubing for motors, transformers, coils, lead insulation and high-temperature electrical assemblies.

Traceable Nomex and general aramid paper options
• Nomex ID approximately 0.8-60 mm
• Nomex wall approximately 0.05-0.76 mm
• General aramid ID approximately 1-60 mm; wall 0.08-0.51 mm

What Is Nomex Paper Tube?

Nomex paper tube is a tubular electrical insulation sleeve made from identified Nomex® aramid paper grades and formed into a tube structure, commonly through winding. It is used where high-temperature electrical insulation, dimensional stability and mechanical toughness are required.

Aramid paper tube is the broader category. A tube should only be described as Nomex® tube when the material source, grade and traceability support that description.

Spiral-Wound Nomex 410 Tube

A spiral-wound tube made from traceable Nomex® 410 electrical insulation paper, designed for custom ID, wall build and cut-length insulation sleeves.

Used:motors-transformers-large coil leads-electrical equipment-high-temperature paper insulation

Aramid Paper Tube 411

A generic aramid paper tube for electrical insulation applications where a branded Nomex® paper grade is not required or not specified.
Used:cost-sensitive insulation,general motor insulation,transformer,protection
industrial electrical sleeves

  • Uncalendered Nomex Aramid Paper 411 tube
  • nomex tubes
  • nomex paper tube
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Nomex Tube

For customers who require tubing made from identified Nomex® aramid paper grades for high-temperature electrical insulation.
used :motor leads -transformer leads-coil insulation-electrical assemblies-high-temperature insulation sleeves

Parameter Nomex tubing General aramid tubing
Inside diameter Approx. 0.8-60 mm Approx. 1-60 mm
Wall build Approx. 0.05-0.76 mm Approx. 0.08-0.51 mm
Construction Wound, commonly spiral Wound, commonly spiral
Length Custom cut length Custom cut length
Material documents By exact Nomex grade and batch By selected paper source
Electrical data Finished-tube condition and method Finished-tube condition and method
Exposure Oil/moisture/heat review Oil/moisture/heat review

No. Nomex® tube should refer to tubing made from identified Nomex® paper grades. Aramid paper tube is the broader category and may use non-Nomex aramid paper.

Choose Nomex 410 tube when the design or customer specification requires a traceable Nomex® 410 electrical insulation paper grade.

No. Finished tube performance also depends on winding structure, wall build, bonding, cut end, conditioning and test method.

Send material requirement, ID, wall build, length, voltage requirement, temperature condition, exposure environment and annual quantity.

A Nomex paper tube is a wound electrical insulation sleeve made from an identified Nomex aramid paper grade. Aramid paper tube is the broader category. The finished tube must still be specified by grade, ID, wall build, overlap, length, conditioning and test method.

No. Nomex is a branded aramid paper family. A generic or other identified aramid paper tube should not be called Nomex unless the material source and traceability support the name.

Nomex tubing can be reviewed at approximately 0.8-60 mm ID and 0.05-0.76 mm wall. General aramid tubing can be reviewed at approximately 1-60 mm ID and 0.08-0.51 mm wall. Exact combinations require engineering confirmation.

Base-paper data are useful references but are not a universal finished-tube guarantee. Winding overlap, wall build, conditioning, moisture, cut end and the finished-tube test method affect the result

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