Micron-Level Precision CNC Spare Parts with ±0.002~0.005mm Tolerance and ISO9001

Our CNC spare parts for bottom brackets are manufactured with micron-level precision to ensure optimal performance and durability in demanding applications.

CNC spare parts boast superior structural integrity and wear resistance, thanks to precise material removal and uniform stress distribution during machining. These parts meet strict industrial standards with stable mechanical properties suitable for heavy-duty applications including precision bearings, hydraulic components, and mold inserts. Their compatibility with automated production lines enables seamless integration into modern manufacturing workflows.

• Ultra-Tight Tolerances: Standard machining to ±0.05mm, with high-precision capabilities reaching ±0.01mm for critical dimensions
• Advanced Equipment: Utilization of multi-axis CNC machining centers (3/4/5-axis), Swiss-type lathes, and milling-turning compound systems
• Surface Excellence: Achievable surface roughness from Ra 0.8 μm to Ra 6.3μm, with mirror polishing options available

• Primary Processes: CNC turning, CNC milling, drilling, boring, threading, grinding
• Secondary Operations: Deburring, chamfering, tapping, knurling, marking
• Heat Treatment: Annealing, quenching & tempering, case hardening, nitriding
• Surface Finishing: Anodizing (Type II/III), plating (Zn, Ni, Cr), passivation, powder coating, sandblasting

• Maximum Part Dimensions:
  Turning: Ø300mm * 500mm length
  Milling: 800mm * 600mm * 500mm (larger available upon request)
• Production Volume: Prototype (1-50 pieces) to high-volume production (10,000+ units)
• Lead Times:
  Prototyping: 3-7 business days
  Standard production: 10-20 business days
  Expedited services available

• Incoming Material Inspection: Certification verification, spectroscopy analysis
• In-Process Control (IPQC): First article inspection, statistical process control
• Final Inspection (FQC):
  CMM measurement (up to 0.001mm accuracy)
  Optical comparator for profile verification
  Surface roughness testing
  Hardness testing (Rockwell, Brinell, Vickers)
• Documentation: Material certifications, full inspection reports, compliance certificates

• DFM Analysis: Design for manufacturability review within 24 hours of drawing submission
• Engineering Collaboration: Co-development with customer engineering teams
• Rapid Prototyping: 3D printing (SLA, SLS, MJF) available for concept validation

• Quotation Request: Submit drawings (DXF, DWG, PDF) or 3D models (STEP, IGES, SLDPRT)
• Technical Review: Engineering assessment of materials, tolerances, and finishing
• Commercial Proposal: Detailed quotation including unit pricing, tooling costs, lead time
• Prototype Approval: Sample production with inspection report submission
• Production Release: Scheduled manufacturing with milestone updates
• Quality Verification: Final inspection report prior to shipping
• Delivery & Support: Tracking information and post-sales technical assistance

• 12+ years average experience among engineering staff
• Dedicated project management for each account
• Continuous process optimization through Six Sigma methodologies

• Long-term partnerships with certified material suppliers
• Risk mitigation through multi-source material procurement
• Inventory management programs for repeat components

• ISO 9001:2015 certified quality management system
• Conflict-free mineral sourcing documentation
• REACH and RoHS compliance for applicable materials