· Product Overview

• Stepped cylindrical profiles (for multi-diameter component compatibility)
• External threads (for secure connection to mating parts)
• Radial positioning holes (to lock accessories or fix shaft position)CNC-machined to ultra-tight tolerances and finished with a passivated polished surface, these shafts deliver precise power transmission and stable component positioning—ideal for high-demand mechanical systems requiring corrosion resistance and dimensional accuracy.

· Core Specifications

• Material: 304 Stainless Steel
  • Tensile strength: ≥515 MPa (rigid for power transfer)
  • Corrosion resistance: Passed 72-hour salt spray test (suitable for humid/industrial environments)
  • Food-safe: Compliant with FDA 21 CFR 175.300 (optional for food-processing equipment)
• Manufacturing Standard: ISO 9001-Certified
  • Key Processes: CNC Turning (stepped profile + external threads) → Precision Drilling (radial positioning holes) → Deburring → Surface Passivation
  • Standard Parameters:
    • Stepped diameters: Customizable (e.g., 12mm/10mm)
    • External thread: M8 (customizable to Metric/Imperial specs)
    • Radial positioning hole: M3 (for locking pins)
    • Dimensional tolerance: ±0.02mm (ensures precise mating with components)
  • Surface Finish: Passivated polished (scratch-resistant, rust-proof, and smooth for low-wear rotation)

· Application Scenarios

• Industrial Automation: Conveyor system drive shafts, robotic arm power transmission shafts, or gearbox output shafts.
• 3D Printing Equipment: Extruder drive shafts, build plate positioning shafts (corrosion-resistant for long-term use).
• Medical & Laboratory Devices: Precision instrument drive shafts (304 SS meets sanitary standards).
• Packaging Machinery: Material feeding drive shafts, component positioning shafts (resists wear from frequent operation).
• Pneumatic/Hydraulic Systems: Cylinder linkage shafts, valve actuation power shafts.

· Production Process Introduction

1. Raw Material Sourcing: Procure certified 304 stainless steel round bars (traceable to quality standards).
2. CNC Turning: Use high-precision CNC lathes to machine the stepped cylindrical profile and external threads (ensures dimensional consistency).
3. Precision Drilling: Drill radial positioning holes (for shaft locking or accessory mounting).
4. Deburring: Remove sharp edges from threads, holes, and stepped transitions (prevents assembly damage and reduces wear).
5. Surface Passivation: Apply chemical passivation to enhance 304 SS’s natural corrosion resistance.
6. Quality Inspection: Verify dimensions (via CMM scans), thread fit (thread gauges), and surface finish → pair shafts for consistent assembly.

· Packaging and Shipping Methods

• Packaging:
  • Individual Pairs: Wrapped in anti-scratch protective film + sealed in moisture-proof plastic bags (marked “Paired Transmission Shafts”).
  • Bulk Orders: Packed in foam-lined partitioned boxes (prevents shaft deformation, thread damage, and surface scratches) + moisture-absorbing desiccants.
• Shipping Options:
  • Express Delivery (DHL/FedEx: 3–5 business days for sample pairs).
  • Air Freight (7–10 business days for small-batch production).
  • Sea Freight (20–25 business days for bulk orders).All shipments include full tracking and damage insurance.

· Process

· Frequently Asked Questions (FAQ)

• MOQ (Minimum Order Quantity): 500 paired sets for standard configurations; 200 pairs for custom designs (with valid technical drawings).
• Lead Time: Standard lead time is 7–10 working days (includes CNC machining and passivation); expedited production (5–7 working days) is available for urgent orders (additional fees apply).
• Customization Capability: Full customization is supported—adjust shaft length, stepped diameters, thread specs, positioning hole size, or switch to 316 stainless steel (for extreme corrosion environments). Our engineering team validates designs for power transfer efficiency and component fit.