· Product Overview

· Core Specifications

Material Performance

Manufacturing Standards

• Certification: ISO 9001 & ISO 13485 (medical-grade compliance available)
• Key Processes: 5-Axis CNC Turning → Precision Thread Rolling → Deburring → Passivation Polishing → CMM Inspection & Thread Fit Testing
• Standard Parameters:
  • Dimensional Tolerance: ±0.01mm (ensures precise alignment with mating components)
  • Surface Finish: Passivated polished (Ra ≤ 0.8μm) for enhanced corrosion resistance and smooth motion
  • Custom Features: Symmetric double-end threads, smooth central shaft, and precision concentricity (≤0.01mm runout)

· Application Scenarios

• Industrial Automation: Robot frame connection shafts, conveyor system support rods, and sensor mounting assemblies.
• Medical & Laboratory Devices: Diagnostic instrument structural shafts, sample handling system connection rods, and surgical tool supports (biocompatible).
• 3D Printing & CNC Machinery: 3D printer frame reinforcement shafts, CNC fixture connection rods, and tool changer alignment components.
• Marine & Offshore Equipment: Boat deck structural bolts, offshore platform support rods, and corrosion-resistant hydraulic system connections.
• Architectural & Furniture: Glass curtain wall connection shafts, modular furniture support rods, and interior structural fasteners.

· Production Process Introduction

1. Raw Material Preparation: Cut certified 304/316 stainless steel bars to exact length and diameter for the shaft profile.
2. 5-Axis CNC Turning: Use high-precision CNC lathes to machine the smooth central shaft and thread preparation profiles in a single setup for maximum concentricity.
3. Precision Thread Rolling: Form the double-end threads using a cold rolling process to enhance thread strength and fatigue resistance.
4. Deburring & Polishing: Remove sharp edges from the threads and shaft ends, then polish the surface to a smooth finish.
5. Passivation Treatment: Apply a chemical passivation process to enhance corrosion resistance and ensure compliance with food/medical safety standards.
6. Quality Inspection: Perform CMM dimensional scanning, thread fit testing, and runout analysis to verify compliance with specifications.

· Packaging and Shipping Methods

• Packaging:
  • Individual Shafts: Wrapped in anti-scratch foam padding and sealed in moisture-proof, anti-static plastic bags to protect the polished surface and threaded ends.
  • Bulk Orders: Packed in foam-lined partitioned boxes (prevents shaft deformation, thread damage, and mixing of sizes/materials).
• Shipping Options:
  • Express Delivery (DHL/FedEx): 3–5 business days for prototype or small-quantity orders, with temperature-controlled shipping available for medical applications.
  • Air Freight: 7–10 business days for medium-batch production runs.
  • Sea Freight: 20–25 business days for large-volume bulk orders.All shipments include full traceability documentation and compliance certificates.

· Process

· Frequently Asked Questions (FAQ)

• MOQ (Minimum Order Quantity): 500 pieces for standard configurations; 200 pieces for custom designs (with valid CAD files/technical drawings).
• Lead Time: Standard lead time is 7–12 working days (includes CNC machining, passivation, and inspection); expedited production (5–7 days) is available for urgent orders (additional fees apply).
• Customization Capability: Full end-to-end customization is supported—adjust material grade (304/316), shaft length/diameter, thread specs (UNC/ISO), or surface finish (electropolishing for enhanced biocompatibility). Our engineering team validates designs for load capacity, corrosion resistance, and thread strength.