Virgin PTFE offers excellent chemical resistance but suffers from “cold flow” (deformation) under heavy mechanical stress. For excavator applications, our wear strips are manufactured using a specialized Bronze-filled PTFE or Carbon-filled PTFE matrix. This composite significantly increases the compressive strength and thermal conductivity of the guiding tape. Operating safely in oil temperatures up to +150°C, the filled PTFE resists deformation under high shock loads while actively embedding microscopic system contaminants into its surface, safely isolating them so they cannot scrape against the polished cylinder barrel.

From a practical maintenance perspective, the PTFE Wear Strip is an invaluable asset for field repairs. Instead of stocking hundreds of individually machined phenolic or POM guide rings, a technician can utilize a single roll of PTFE tape to service multiple cylinder sizes. When installing, the strip is simply measured and cut to length—typically using a $30^\circ$ or $45^\circ$ skived (angled) cut. This calculated gap is critical; it accommodates thermal expansion of the PTFE material as the hydraulic fluid heats up, and it allows hydrodynamic oil flow to bypass the bearing and lubricate the primary dynamic seals, ensuring true “dry-run” protection.