Precision Tungsten Carbide Cylinder Bore with +0.004mm Tolerance, High Corrosion Resistance, and Mirror-Polished Surface for Sliding Fit Applications

In precision mechanical systems where pistons, plungers, or shafts must slide smoothly within a cylinder bore—whether for gas sealing, fluid metering, or high-speed actuation—the dimensional accuracy of the bore is the single most critical factor determining performance, efficiency, and service life.

Our Precision Tungsten Carbide Cylinder Bore is engineered to meet the most demanding sliding fit requirements, with a specified internal diameter tolerance of +0.004mm. This micron-level precision ensures consistent clearance between the cylinder and its mating piston or shaft, enabling smooth, friction-minimized motion while maintaining effective sealing.

Manufactured from premium tungsten carbide (WC-Co) via advanced powder metallurgy, isostatic pressing, and precision diamond grinding, this cylinder bore delivers the exceptional hardness, wear resistance, and dimensional stability required for long-term reliability in compressor systems, gas sealing assemblies, precision pumps, and automation equipment.

• Exceptional Wear Resistance: Tungsten carbide cylinder bores maintain their precision geometry far longer than steel or stainless steel alternatives—extending service life by 3 to 5 times.
• Superior Surface Finish: Diamond grinding achieves mirror-polished bore surfaces (Ra ≤ 0.05μm), minimizing friction and enabling smooth, consistent sliding motion.
• High Dimensional Stability: The material's high rigidity ensures the bore maintains its cylindrical form and tolerance under load, preventing the ovality or tapering that can occur with softer materials.
• Corrosion & Chemical Resistance: Tungsten carbide is fully inert, making it suitable for gas sealing applications and exposure to aggressive media.

Tungsten carbide offers significantly higher hardness (HRA 90+ vs. HRC 40-60 for hardened steel), superior wear resistance (3-5× longer service life), and better dimensional stability under load. The material is also fully corrosion-resistant and maintains its properties at elevated temperatures.

We achieve cylindricity and coaxiality of ≤0.002mm. This ensures the bore remains perfectly round and aligned along its length, which is critical for consistent sliding fit and effective sealing.

We achieve a mirror-polished bore surface with Ra ≤ 0.05μm. This ultra-smooth finish minimizes friction, reduces wear on mating components, and extends service life.