· Product Overview

· Core Specifications

Material Performance

• 304 Stainless Steel
  • Tensile Strength: ≥515 MPa (rigid for high-torque power transfer)
  • Corrosion Resistance: Passed 72-hour salt spray test (suitable for humid/industrial environments)
  • Food-Safe: Compliant with FDA 21 CFR 175.300 (ideal for food-processing equipment)
  • Hardness: 150–180 HV (balanced rigidity and ductility for repeated assembly)

Manufacturing Standards

• Certification: ISO 9001-Certified
• Key Processes: CNC Turning (multi-stepped profile + hex drive) → Precision Threading (external male threads) → Slot Milling → Deburring → Surface Passivation → CMM Inspection
• Standard Parameters:
  • Hex Drive Width: 18–24mm (compatible with standard wrenches)
  • Stepped Body Diameters: 20mm / 15mm (optimized for component fit)
  • External Thread: M10 (customizable to Metric/Imperial specs like M8/M12)
  • Overall Length: 60–80mm (customizable 40–100mm)
  • Dimensional Tolerance: ±0.01mm (ensures precise mating with bearings, gears, and fixtures)
  • Surface Finish: Passivated polished (scratch-resistant, rust-proof, and smooth for low-wear operation)

· Application Scenarios

• Industrial Automation: Conveyor system drive shafts, robotic arm joint connectors, and gearbox output shafts.
• Automotive & Marine: Engine component mounting shafts, suspension adjustment bolts, and boat hardware connectors.
• Medical & Laboratory Equipment: Diagnostic instrument drive shafts, sample handling system components, and surgical tool positioning bolts.
• 3D Printing & CNC Machinery: 3D printer extruder drive shafts, CNC fixture clamping bolts, and tool changer positioning shafts.
• DIY & Hobby Projects: RC vehicle suspension bolts, custom robotics drive shafts, and workshop jig clamping components.

· Production Process Introduction

1. Raw Material Preparation: Cut certified 304 stainless steel round bars into blanks matching the shaft's overall length.
2. CNC Turning: Use high-precision CNC lathes to machine the multi-stepped profile and hexagonal drive section in a single setup for maximum concentricity.
3. Precision Threading: Create external male threads with high accuracy to ensure leak-free mating and torque transfer.
4. Slot Milling: Machine the precision slot in the hexagonal section for spring retention or additional torque points.
5. Deburring & Finishing: Remove sharp edges from threads, slots, and stepped transitions to prevent component wear and ensure safe handling.
6. Surface Passivation: Apply a chemical passivation treatment to enhance 304 stainless steel’s natural corrosion resistance.
7. Quality Inspection: Perform CMM dimensional scanning, thread fit testing, and torque capacity validation to verify compliance with design specifications.

· Packaging and Shipping Methods

• Packaging:
  • Individual Pairs: Protected with anti-scratch foam padding, sealed in moisture-proof plastic bags, and labeled with thread specifications for traceability.
  • Bulk Orders: Packed in foam-lined partitioned boxes (prevents shaft deformation, thread damage, and mixing of sizes).
• Shipping Options:
  • Express Delivery (DHL/FedEx): 3–5 business days for prototype or small-quantity orders.
  • 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 tracking and damage insurance.

· Process

· Frequently Asked Questions (FAQ)

• Lead Time: Standard lead time is 7–30 working days (includes CNC machining, passivation, and inspection); expedited production (5–7 working days) is available for urgent orders (additional fees apply).
• Customization Capability: Full customization is supported—adjust hex width, stepped diameters, thread size/pitch, slot geometry, or switch to 316 stainless steel for extreme corrosion environments. Our engineering team validates designs for torque capacity and component fit.