Custom CNC Machined Stainless Steel Mechanical Parts

This stainless steel stepped threaded shaft demonstrates FlexiTurn’s CNC turning and milling capabilities for high-precision rotary hardware. Key engineering demands—including multi-diameter step concentricity, tight thread pitch execution, O-ring seal groove tolerances, and wrench flat orientation—are addressed using single-setup mill-turn operations to ensure zero-defect integration into fluid power, medical, and industrial systems.

Precision Machining & Processing Capabilities

• Single-Setup CNC Turning: Outer diameter (OD) steps, internal bores, external threads, O-ring seal grooves, and end faces are turned in a single setup, eliminating re-chucking runout and holding strict concentricity and cylindrical geometry.
• Integrated CNC Milling: Precision 3-axis CNC milling cuts the driving wrench flats with tight angular and true-position tolerances relative to the thread centerlines for positive tool engagement.
• Thread & Surface Integrity: Precision thread-chasing cycles deliver burr-free pitch geometries for ISO metric, NPT, and UN/UNJ threads, preventing galling during assembly.
• Secondary Operations: Optional cylindrical grinding, passivation, and electropolishing available to meet sanitary, ultra-clean, or severe corrosion-resistance requirements.

Materials & Technical Specifications

• Stainless Steels:  AISI 304, 304L, 316, 316L, 17-4PH, 316Ti, Duplex 2205 (Certificates Supplied)
• Dimensional Tolerances:  ±0.005 mm on ground sealing journals; ±0.01 mm on standard turned diameters Geometric
• Tolerances Concentricity: ≤ 0.005 mm; Runout ≤ 0.008 mm; Perpendicularity ≤ 0.01 mm
• Thread Classes: ISO 6g / 6H, Class 2A / 3A (100% thread ring/plug gauge verified)
• Surface Finish: Ra 0.8–1.6 μm (Standard Turned); Ra < 0.2 μm (Precision Ground / Electropolished)

Quality Assurance & Compliance Deliverables

• Operating under an ISO 9001:2015-aligned quality framework, FlexiTurn backs every shipment with rigorous documentation:
• Material Certification: Original EN 10204 3.1 Mill Test Certificates verifying chemical composition and mechanical properties.
• In-Process Monitoring: Dimensional inspection at initial setup, mid-run tool wear checks, and final 100% feature verification.
• CMM Inspection Reports: 3D CMM dimensional logs, surface roughness profiles, and optical thread pitch charts provided on demand.

Why Choose FlexiTurn

• Stainless Steel Machining Expertise: Optimized cutting parameters, rigid tooling setups, and dedicated high-pressure coolant suppress work hardening and surface galling in austenitic and duplex stainless steels.
• Single-Setup Runout Elimination: Machining all rotational features without un-clamping eliminates cumulative fixturing error, maintaining strict concentricity across all shaft steps.
• 100% In-House Process Ownership: Raw material testing, precision machining, secondary grinding, surface finishing, and inspection are executed entirely on-site.
• Free 24-Hour DFM Review: Technical drawing reviews evaluate thread relief pockets, tool transition radii, and wall stability to prevent manufacturing bottlenecks and lower unit costs.
• Strict Data Security: All CAD drawings and proprietary project specifications are stored under encrypted protocols, with Non-Disclosure Agreements (NDAs) signed prior to file transfer.

Partner with FlexiTurn

Submit your 2D/3D CAD drawings (STEP/IGES/PDF) with material specifications, tolerance requirements, and target order quantities. FlexiTurn provides rapid DFM assessments and direct-factory quotations within 24 hours.

Q1. What types of machining services do you offer?

We provide comprehensive CNC turning and milling services. FlexiTurn machines are equipped with 8-station programmable turrets and support both turning and 5-axis milling operations, making them suitable for everything from simple cylindrical parts to complex multi-axis components.

Q2. What materials can you work with?

We machine a wide range of materials including carbon steel, stainless steel, aluminum, plastics, and other engineering-grade materials. If you have a specific material in mind, just send us your requirements and we'll confirm feasibility.

Q3. What is your typical lead time?

Lead times vary depending on part complexity, quantity, and material availability. For prototypes and small-batch runs, we typically deliver within 5–10 business days. For high-volume production, we'll provide a customized schedule after reviewing your drawings. Contact us with your project details for an accurate timeline.

Q4. How do you price your services?

Pricing is based on several factors: material cost, machining time, tooling requirements, setup complexity, and order quantity. We offer competitive rates for both low-volume prototypes and high-volume production runs. Request a quote with your CAD files or drawings and we'll get back to you within 24 hours.

Q5. What quality control measures do you have in place?

We follow strict quality control procedures throughout the machining process. Our CNC systems support programmable precision down to 1 μm, ensuring high accuracy and repeatability. Every batch undergoes dimensional inspection before shipping, and we can provide inspection reports upon request.