CNC Machined Hydraulic Fitting

CNC machined hydraulic fitting is a hydraulic fitting connects hoses, tubes, pumps, valves, and cylinders in a hydraulic system. It looks simple — a metal body with threads and a sealing face — but it operates under brutal conditions: pressures from 50 to 400+ bar, temperature swings, vibration, and hydraulic fluid that finds any leak path like water finds a crack.

The fitting's job is to seal. Whether it is a JIC 37° flare, an ORFS (O-ring face seal), a BSPP parallel thread, or an NPT tapered thread, the sealing geometry is machined to micron precision. A sealing surface out of round by 0.02mm is a fitting that weeps. A thread with a torn root is a fitting that blows off under pressure. That is why machining quality is not a "nice to have" here — it is a safety issue.

Key Features & Benefits of CNC machined hydraulic fitting

Sealing Surfaces Machined, Not "Good Enough" The 37° flare cone, O-ring groove, and seat faces are machined with controlled tolerances (seat angle ±0.5°, surface finish Ra 0.8μm max). A proper sealing surface is what keeps 350 bar inside the pipe and out of your equipment room.

Clean, Sharp Threads Threads are cut or rolled to 6g/6H with full profile form — no torn roots, no rolled-over crests. Tapered threads (NPT/BSPT) are verified with L1/L2 ring gauges to guarantee a tight, non-leaking joint.

Pressure-Tested Confidence We pressure test fittings to 1.5× rated working pressure on sampled batches, and every fitting is visually and dimensionally inspected. For critical applications, 100% pressure testing is available.

Material Right for the Fluid Carbon steel zinc-plated for standard mineral oil systems; stainless 316 for food, marine, and aggressive fluids; brass for low-pressure pneumatic and water service. The right material prevents galvanic corrosion and premature failure.

Cleanliness You Can Specify Fittings are ultrasonically cleaned and packaged to your cleanliness specification — including ISO 4406 cleanliness classes for sensitive servo and proportional systems.

Product Specifications

Typical Applications

As a CNC machined hydraulic fitting manufacturer and supplier, Tuoyuan Metal supplies fittings in bulk at factory-direct pricing for:

Mobile hydraulics — excavators, loaders, agricultural machinery

Industrial hydraulic systems — presses, injection molding machines, machine tools

Construction equipment hydraulic circuits

Marine and offshore hydraulic systems (316 stainless)

Food processing and pharmaceutical fluid lines

Test benches, lubrication systems, and pneumatic circuits

Production Process

Hydraulic fittings are machined from bar stock on CNC lathes — often in a single clamping cycle. Hex bodies are turned, drilled, threaded, and the sealing geometry (flare cone, O-ring groove, or taper) is cut with dedicated tooling. The single-setup approach is what holds the sealing surface concentric with the thread.

After machining, fittings are deburred — critical on sealing faces — then surface treated (zinc plating, zinc-nickel, or passivation). Fittings are ultrasonically cleaned to remove chips and residue, then inspected: thread gauging, seat angle check, dimensional measurement, and sampled pressure testing.

Why Choose Tuoyuan Metal

Machining Precision Where It Counts Our CNC lathes hold repeat positioning accuracy of ≤±0.003mm, and we routinely machine to ±0.01mm on fittings — the tolerance band that keeps sealing surfaces true and threads gage-clean.

Decade of Metalworking Expertise Over 10 years in precision turned parts, with a 5,000 m² factory, 20 CNC lathes, and 100-million-piece annual capacity. We have machined every fitting standard in this catalog — many times over.

48-Hour Quality Response If a problem is found, we respond within 48 hours and take full compensation responsibility as agreed. That commitment, honored consistently, is why 95% of our customers reorder.

Export-Ready Documentation Material certificates, inspection reports, and pressure test records ship with every order. Third-party inspection coordination available.

Packaging & Shipping

Fittings are cleaned, protected against corrosion, and packed in poly bags, cartons, or export wooden cases. Express, air, and sea freight available from Qingdao Port. Documentation: Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, Material Test Certificate. For CNC machined hydraulic fitting prices, bulk orders, or a quotation, contact our export team.

High-Precision Threaded Shafts for Industrial Equipment

Client: European Hydraulic Equipment Manufacturer

Industry: Fluid Power & Industrial Automation

Material: Stainless Steel / Carbon Steel

Process: Precision CNC Turning, Milling, Threading & Heat Treatment

The client required custom multi-stepped threaded shafts with tight tolerances and smooth surface finish to prevent leakage and mechanical wear in high-pressure hydraulic assemblies. Standard market components failed to satisfy their specific torque and alignment requirements.

Using multi-axis Swiss CNC turning and precision milling machines, we manufactured customized shafts with exact thread profiles and flat-milled features according to the client’s technical drawings. Strict quality control, including 100% thread gauge testing and surface roughness checks, was applied before shipping.

FAQ

Q: Which fitting standard should I use? 

A: It depends on your region and hose ends: JIC is common in North America, BSP in Europe/Asia, metric DIN in Germany, ORFS where vibration and leak-free performance matter. Send us your current fittings or drawings and we will identify the standard and supply matching fittings.

Q: What pressure can your fittings handle? 

A: Standard fittings are rated to 350 bar working pressure; high-pressure configurations up to 630 bar. We pressure test sampled batches to 1.5× rated pressure.

Q: Can you supply stainless steel fittings for food or marine use? 

A: Yes — SUS316 fittings with passivation finish are available for food, marine, and pharmaceutical applications. Material certificates provided.

Q: Do you offer custom fittings per drawing? 

A: Yes, completely custom fittings are our specialty. Send a drawing or sample and we will machine to your exact geometry, including custom port configurations.

Q: What is your MOQ and delivery time of CNC machined hydraulic fitting? 

A: Samples: 3–5 days, MOQ flexible. Production: average 15 days. Sea freight from Qingdao, or express for urgent small orders.