Why do honed hydraulic hoses have a higher surface roughness?
Release time:
2026-03-26
1. Oil Gaps – Rough surfaces "hold" more lubricating oil: Countless tiny grooves form a natural oil pool, reducing dry friction and extending cylinder life.
2. Self-protection during start-stop: During low-speed, heavy-load start-stop, smooth surfaces are prone to "creeping," while honed textures provide a stable oil film, preventing direct metal-to-metal contact.
3. Contaminant "Trap": The grooves trap hard abrasive particles, preventing scratches on the cylinder wall – this self-cleaning ability is a unique advantage of high roughness.
4. Logic of the Fit with the Piston Rod: The piston rod (usually chrome-plated and polished, smooth) is a reciprocating rod, primarily sealing against dust; the honed tube (rough inner wall) encloses the cylinder wall, primarily sealing against pressure.
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