A cylindrical sleeve that forms the inner wall of an engine cylinder, providing a wear-resistant surface for piston movement.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Hardness | 180-240 HB (Brinell) | |
| Cylindricity | <0.015 mm | |
| Concentricity | <0.02 mm | |
| Wall Thickness | 2-8 mm (varies by engine type) | |
| Surface Roughness (Ra) | 0.4-1.6 μm | |
| Inner Diameter Tolerance | H7/H8 (ISO) |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
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Manufacturer profiles associated with Liner (Cylinder Sleeve).
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Wet liners have direct contact with engine coolant for better heat transfer but require sealing at both ends. Dry liners are press-fitted into the engine block without coolant contact, offering simpler installation but potentially less efficient cooling.
Replacement depends on wear measurements. Typically, liners last 500,000-1,000,000 km in automotive applications or 10,000-20,000 operating hours in industrial engines. Replacement is needed when wear exceeds 0.1-0.15% of bore diameter or scoring/damage occurs.
Common causes include abrasive wear from contaminated oil, cavitation erosion from coolant-side pressure fluctuations, thermal cracking due to overheating, corrosion from acidic combustion byproducts, and improper installation leading to distortion.
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