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PTFE Liner ID Tolerance: How Much Clearance Does a Moving Cable Really Need?

There is no universal answer such as: “Always leave 0.2 mm clearance.” The correct clearance depends on the complete mechanical system. That includes: cable diameter; liner ID tolerance; cable tolerance; ovality; bend radius; lubricant; temperature; contaminants; assembly compression. A useful design therefore starts with a clearance window, not a nominal number. Nominal clearance is not […]

When Does an Automotive Control Cable Need an Etched PTFE Liner?

PTFE creates an unusual design problem. The same low surface energy that makes PTFE useful as a sliding liner also makes it difficult to bond. For a free-floating liner, this may be perfectly acceptable. For a multilayer control-cable housing, it may not be. Quick answer Use etched PTFE only when the construction requires the PTFE […]

etching PTFE liner tubing

PTFE is a non-stick material that is resistant to high temperatures and corrosion and is very smooth, and is widely used in military medical food, etc . However, when it needs to be bonded to the surface of another material, or in order to bond standard PTFE to another surface while combining the advantages of […]