Precision 6061 Optical Input Mirror Mount with Internal Thread Coaxiality and Burr-Free Cross-Hole Control

We successfully manufactured a precision 6061 optical input mirror mount for a hydraulic fluid control system application. This precision cylindrical mount features an internal threaded bore for optical component mounting, cross-drilled side holes intersecting the main bore, and a precision flange sealing face — presenting significant manufacturing challenges including internal thread-to-bore coaxiality, burr-free cross-hole intersections between side holes and the main bore, and micron-level flange seal face flatness control. Through integrated turn-mill machining, specialized deburring techniques, and precision facing operations, we delivered high-quality mirror mounts meeting both optical and fluid sealing requirements.

Project Overview

Key Technical Highlights

• Internal Thread Coaxiality Control: Achieved ≤0.015mm thread-to-bore coaxiality through single-setup turn-mill machining — boring and threading operations performed from a common datum, ensuring perfect alignment between optical component threads and the mount's reference bore.
• Process Innovation:
  • Single-Setup Turn-Mill Integration: Main bore boring, internal threading, and cross-hole drilling performed in coordinated setups maintaining geometric alignment between all features.
  • Burr-Free Cross-Hole Intersection: Specialized deburring tools with controlled brushing/abrasive techniques remove burrs at side hole-to-main bore junctions — preventing particle generation and flow disruption in hydraulic fluid systems.
  • Micron-Level Seal Face Flatness: Precision facing with controlled finishing passes achieves ≤0.005mm flatness and Ra≤0.4μm surface finish on the flange sealing face — ensuring leak-proof fluid sealing.
  • Staged Machining Sequence: Rough turning establishes geometry, followed by precision boring, threading, cross-drilling, and final seal face finishing.
• Surface Quality:
  • Seal face achieves ≤0.005mm flatness with Ra≤0.4μm finish.
  • Internal bore maintains Ra≤1.6μm finish for smooth optical component installation.
  • Cross-hole intersections verified burr-free through borescope inspection.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for internal thread coaxiality (≤0.015mm), seal face flatness (≤0.005mm), and dimensional accuracy (±0.015mm), supplemented by surface roughness testing (Ra≤0.4μm seal face / Ra≤1.6μm bore), and borescope inspection for cross-hole burr-free verification.

Industry Applications

This solution demonstrates our expertise in precision optical-fluidic interface component manufacturing, ideal for:
✓ Hydraulic fluid control optical input ports ✓ Precision mirror mounts with fluid sealing ✓ Optical sensor mounting interfaces ✓ Fluid-optical hybrid system components

Why Partner With Us?

• Proven expertise in internal thread coaxiality control for optical alignment
• Advanced cross-hole burr-free intersection capabilities for fluid systems
• Micron-level seal face flatness (≤0.005mm) for leak-proof sealing
• 12+ years of precision manufacturing experience across optical and fluid control sectors