· Product Overview

· Core Specifications

Material Performance

Manufacturing Standards

• Certification: ISO 9001 & ISO 13485 (medical-grade compliance available)
• Key Processes: 5-Axis CNC Turning → Precision Knurling → Thread Forming → Deburring → Passivation Polishing → CMM Inspection & Grip Testing
• Standard Parameters:
  • Dimensional Tolerance: ±0.005mm (ensures precise alignment with mating components)
  • Surface Finish: Passivated polished (Ra ≤ 0.8μm) for enhanced corrosion resistance and smooth handling
  • Custom Features: Knurled grip knob (straight rib pattern), precision threaded end, and multi-stepped shaft for component alignment

· Application Scenarios

• Industrial Automation: Machine tool adjustment shafts, conveyor system locking pins, and robotic end-effector positioning controls.
• Medical & Laboratory Devices: Diagnostic instrument focus knobs, sample handling system adjustment shafts, and surgical tool positioning components (biocompatible).
• Optics & Photographic Equipment: Camera lens focus shafts, telescope eyepiece adjustment knobs, and lighting fixture locking controls.
• Aerospace & UAVs: UAV camera gimbal adjustment shafts, avionics system control knobs, and satellite equipment positioning pins.
• DIY & Hobby Projects: Custom robotics control knobs, workshop jig adjustment shafts, and RC vehicle tuning components.

· 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 multi-stepped shaft, knurled knob base, and thread preparation profile in a single setup for maximum concentricity.
3. Precision Knurling: Apply a straight-rib knurl pattern to the knob surface for a secure, non-slip grip.
4. Thread Forming: Create the precision threaded end using a cold rolling process to enhance thread strength and fatigue resistance.
5. Deburring & Polishing: Remove sharp edges from the knurl, threads, and shaft ends, then polish the surface to a smooth finish.
6. Passivation Treatment: Apply a chemical passivation process to enhance corrosion resistance and ensure compliance with food/medical safety standards.
7. Quality Inspection: Perform CMM dimensional scanning, thread fit testing, and grip validation 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, knurl, and threaded end.
  • Bulk Orders: Packed in foam-lined partitioned boxes (prevents shaft deformation, knurl 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, knurl pattern (straight/diamond), thread specs (UNC/ISO), or surface finish (electropolishing for enhanced biocompatibility). Our engineering team validates designs for grip performance, corrosion resistance, and thread strength.