Precision Machining Parts for Hydraulic

Precision-Machined Hydraulic Components—Power, Reliability, Zero Leaks

High-pressure hydraulics don’t forgive sloppy tolerances. A few microns of play can turn into costly downtime, contamination, or catastrophic failure. That’s why Tier-1 OEMs, system integrators, and R&D labs worldwide rely on Rollyu Precision for valve spools, cylinders, manifolds, pump internals, and complete motion assemblies machined to aerospace-grade accuracy—backed by ISO 9001 & ISO 13485 quality systems and a relentless drive for continuous improvement.

What We Deliver

1. Hydraulic Cylinders
        • Pistons & Rods — hard-chrome or DLC-coated, roundness ≤ 2      µm
        • Barrels — honed finishes < 0.1 µm Ra for seal longevity      and low friction

2. Pumps & Motors
        • Gears, Vanes, Pistons — AISI 4140, 17-4 PH, or 7075-T6 Al,      dynamically balanced for whisper-quiet flow
        • Housings — one-piece CNC blocks, helium-leak-tested to < 1      × 10⁻⁶ mbar·L/s

3. High-Response Valves
        • Spools — super-finished and lapped to match bores within 3 µm,      guaranteeing crisp actuation
        • Bodies — 5-axis-milled passages that slash pressure drop and      virtually eliminate cavitation

4. Manifolds & Power Packs
        • Cross-drilled or 3-D-milled galleries validated by CFD analysis
        • Footprint reductions up to 30 % versus legacy layouts—without      sacrificing flow capacity

5. Fittings & Connectors
        • NPT, BSPP, ORFS, flare—cut in a single Swiss-turn pass for razor-sharp      threads and leak-tight seals

Materials Matched to Your Environment

Manufacturing Toolbox

• Ultra-Precision CNC Turning & 5-Axis Milling — ± 0.005 mm repeatability on every production run

• Wire EDM & Gun-Drilling —      burr-free intersecting galleries as small as Ø0.3 mm

• EDM & Laser Cutting —      cost-effective for complex geometries in tool-steel or exotic alloys

• Surface Treatments — nitriding,      DLC, electroless nickel, phosphate, black oxide, hard anodizing

• Lights-Out Manufacturing — 24/7      unattended machining for reduced lead-times and consistent quality

100 % Quality Assurance

• Hydrostatic testing to 1 000 bar (14 500 psi)

• Helium-leak, pressure-pulse & burst tests on every      lot—traceable to part serial numbers

• CMM verification of all sealing diameters and critical datums;      SPC charts supplied on request

• Full PPAP / FAIR documentation, material certs, and RoHS /      REACH compliance included with every shipment

Typical Applications

• Industrial presses & injection-molding machines—rapid clamp cycles with zero drift

• Mobile hydraulics—construction,      mining, agriculture, forestry, and port-handling equipment

• Test stands & simulators—aerospace      flight controls, automotive shock-absorber rigs

• Offshore & subsea power units—salt-spray-resistant      manifolds and cylinders for ROVs and BOPs

Engineering Support That Shortens Your Time-to-Market

Need help optimizing flow paths or selecting the best alloy for abrasive media? Our in-house DFM (Design for Manufacturability) team and fluid-power engineers provide fast, actionable feedback—often within 24 hours. We also offer rapid prototypes in as little as 7 working days, bridging the gap between concept and production with minimal risk.

Ready to Eliminate Leaks and Downtime?

Let’s transform your schematics into rock-solid, leak-proof hardware. Send your 3-D models or RFQ today and discover how Rollyu’s precision can boost your hydraulic system’s performance—whether you need a single prototype or a rolling Kanban program.