Precision 6061 Cross-Knurled Grip Handle with Turn-Mill Integration and Blue Hard Anodizing

We successfully manufactured a precision 6061 aluminum cross-knurled grip handle with blue hard anodized finish for a UAV accessory application. This ergonomic component features large-area cross knurling for secure grip and a fork-style dual-hole mounting interface — presenting significant machining challenges including large-area knurling with edge burr removal, cross-fork dual-hole coaxiality, and stringent positional accuracy between features. Through integrated turn-mill machining, precision boring operations, and specialized deburring techniques, we delivered dimensionally accurate grip handles with clean knurled surfaces and precise hole alignment.

Project Overview

Key Technical Highlights

• Large-Area Cross Knurling with Edge Deburring: Implemented precision knurling operations across the full grip surface with specialized knurling tools and controlled feed rates, followed by automated edge deburring techniques to remove knurl edge burrs without damaging the cross-hatch pattern — ensuring comfortable, safe handling.
• Process Innovation:
  • Integrated Turn-Mill Workflow: Cylindrical turning establishes the grip body geometry, followed by milling operations for the cross-fork features — all within coordinated setups ensuring geometric alignment across all features.
  • Cross-Fork Dual-Hole Coaxiality Control: Precision boring of both fork holes in a single fixturing setup with precision boring bars achieves ≤0.01mm coaxiality between the two holes, ensuring smooth pin or shaft insertion.
  • Stringent Positional Accuracy: Single-setup machining with CMM-verified fixture positioning ensures fork hole positions held to ±0.015mm relative to grip centerline and reference features.
  • Knurling Edge Treatment: Post-knurling deburring with controlled brushing/abrasive techniques removes edge burrs while preserving knurl pattern integrity.
• Surface Quality:
  • Precision finishing achieves Ra≤1.6μm surface finish on all machined surfaces.
  • Blue Hard Anodized Finish: Type III hard anodizing with blue dye creates a durable ceramic-like oxide layer (25-50μm) providing exceptional wear resistance, corrosion protection, and distinctive blue aesthetic — ideal for UAV accessory applications.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for dual-hole coaxiality (≤0.01mm), hole positional accuracy (±0.015mm), and overall dimensional tolerance (±0.02mm), supplemented by knurling pattern inspection, edge burr verification, and anodized coating inspection.

Industry Applications

This solution demonstrates our expertise in precision turn-mill component manufacturing with decorative hard anodizing, ideal for:
✓ UAV accessory handles ✓ Camera/gimbal mounting handles ✓ Ergonomic control interfaces ✓ Precision grip components

Why Partner With Us?

• Proven expertise in large-area knurling with edge deburring control
• Advanced dual-hole coaxiality and positional accuracy capabilities
• Integrated turn-mill manufacturing for complex hybrid geometries
• In-house blue hard anodizing with MIL-spec compliance
• 12+ years of precision manufacturing experience across UAV, aerospace, and industrial sectors