OEM CNC Industrial Automation Components Precision Rotary Joint Assembly Parts

Product Overview

We deliver custom CNC‑machined rotary union assemblies for industrial automation fluid transfer systems. Manufactured by high‑precision 4‑axis & 5‑axis turn‑mill composite machining, these components feature complex internal flow passages, precision flange mounting holes, ultra‑tight sealing mating surfaces and multi‑part assembly interfaces. Suitable for machine‑tool spindles, rotary tables, robotic fluid loops and other high‑reliability industrial equipment. We accept custom‑built prototypes, small‑batch runs and volume mass‑production based on customer CAD drawings and performance requirements.

Typical Product Parameters

Note: Actual tolerance, pressure rating and surface finish depend on raw material, part geometry, operating media and drawing requirements.

Machining & Material Description

Our custom rotary union housings and shaft bodies are fully machined from solid forged bar stock rather than cast blanks, eliminating casting porosity risks for high‑pressure fluid service.
Multi‑axis turn‑mill CNC processing completes intricate internal flow channels, flange bolt‑hole patterns, precision sealing lands and locating register surfaces in minimal set‑ups. Strict incoming material verification certifies raw‑stock chemical composition and mechanical properties.
For stainless‑steel and high‑strength alloy grades, we optimize cutting feeds/speeds to control thermal distortion during heavy stock removal. All sealing mating faces undergo dedicated precision lapping to achieve ultra‑low surface roughness, ensuring stable anti‑leak performance under continuous rotation. Custom material grades can be supplied to match special‑media or corrosion‑resistance demands.

Surface Finishing List

‑ Passivation ‑ Electropolishing ‑ Precision Lapping ‑ Hard Chrome Plating ‑ Black Oxide Coating ‑ Anodizing

FAQ

Q1: Are you able to build this custom rotary union according to my step/IGES CAD drawing? A: Yes, custom manufacturing is our core capability. Please share your CAD files together with operating parameters (pressure, speed, working medium), we will perform technical review and provide formal quotation.

Q2: Which alternative materials can replace 316L stainless steel for this rotary joint assembly? A: We support 17‑4PH precipitation hardening stainless steel, 4140 alloy steel or high‑strength aluminum for different pressure‑weight‑corrosion trade‑offs.

Q3: What concentricity & flatness can you hold for these rotating sealing mating faces? A: Standard concentricity within 0.02 mm; for critical sealing interfaces we can achieve concentricity down to 0.008 mm via precision lapping process.

Q4: Can you do electropolishing & passivation treatment for stainless‑steel rotary union components? A: Absolutely. Electropolishing and passivation are available to boost corrosion‑resistance and clean‑room suitability for fluid‑contact surfaces.

Q5: What is your MOQ for custom CNC‑machined rotary union parts? A: One‑off prototype and small‑batch orders are welcomed. Minimum order quantity depends on part complexity and material selection, contact us for detailed offer.