Precision-Engineered Hydraulic Cylinder Components

CNC Works AI produces pistons, piston rods, cylinder caps, glands, barrel tubes, seal retainers, and custom cylinder hardware. Components are manufactured to customer drawings with tolerances to ±0.005mm and full inspection documentation.

Hydraulic piston rods typically require a surface roughness of Ra 0.2–0.8 μm to maintain seal life and prevent leakage. CNC Works AI supplies hard-chrome-plated and nitrided rods with controlled surface finish, or can finish-machine customer-supplied bar stock.

O-ring gland grooves are machined to SAE AS568A and ISO 3601 design guidelines. Groove width, depth, and corner radii are controlled to ensure proper compression without extrusion. According to our CNC machining knowledge base, live tooling on CNC lathes enables complex grooves and profiles in one setup.

For high-pressure applications, 4140 steel or 17-4PH stainless steel are commonly used for rods, pistons, and glands due to their strength and fatigue resistance. Barrel tubes are often ST52 or 4140 honed tubing. For corrosive environments, 316L stainless steel is recommended.

Standard tolerance is ±0.005mm. Bore tolerances are typically H7 or H8 depending on seal requirements. Rod diameters are held to f7 or customer-specified fits. Concentricity between rod and piston can be controlled to 0.01mm.

Yes. CNC Works AI coordinates hard chrome plating, nitriding, electroless nickel, anodizing, and passivation through certified finishing partners. Finishes are selected based on wear resistance, corrosion protection, and seal compatibility requirements.

Standard prototypes ship in 5-7 business days. Rush service is available in 7–15 days for urgent projects. Production volumes of 1,000+ units typically deliver within 2-4 weeks. We maintain raw material stock for common cylinder alloys to reduce lead times.

CNC Works AI is ISO 9001:2015 certified for quality management, AS9100D certified for aerospace applications, and ISO 13485 certified for medical devices. The quality lab is equipped with CMM, optical comparators, surface roughness testers, and hardness testers.