Precision 6061 Multi-Hole Flange End Cap with Thin-Wall Warpage and Coaxiality Control

We successfully manufactured a precision 6061 multi-hole flange end cap for a servo motor application. This thin-wall disk-shaped end cap features precision mounting holes and bearing interfaces on both faces — presenting significant machining challenges including thin-wall disk warpage during clamping, feature alignment across two-part flipping operations, and stringent coaxiality between front and back features. Through low-stress fixturing, precision datum-based flipping strategies, and controlled machining sequences, we delivered dimensionally stable end caps with consistent front-back feature alignment.

Project Overview

Key Technical Highlights

• Thin-Wall Warpage Prevention: Implemented low-stress fixturing with distributed support across the entire disk surface, combined with controlled clamping pressure and staged machining sequences to prevent thin-wall warpage during both face machining operations.
• Process Innovation:
  • Low-Stress Fixturing Design: Custom fixtures with full-surface backing support distribute clamping forces evenly across the thin disk, preventing localized distortion and maintaining flatness ≤0.01mm.
  • Datum-Based Flipping Strategy: Precision-machined datum features on Face A serve as reference for flipping to Face B, ensuring ≤0.015mm coaxiality between front and back critical features.
  • Controlled Machining Sequence: Face A is roughed and finished establishing datums, followed by Face B machining referenced to established datums — minimizing accumulated errors across the flip operation.
  • Bearing and Mounting Feature Precision: Precision boring and spot-drilling operations on both faces maintain tight tolerances for bearing fit and fastener alignment.
• Surface Quality:
  • Precision finishing achieves Ra≤1.6μm surface finish on all interface surfaces.
  • Controlled clamping prevents surface marks and distortion on visible faces.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for coaxiality (≤0.015mm), hole positional accuracy (±0.015mm), flatness (≤0.01mm), and dimensional tolerance (±0.02mm), supplemented by surface roughness testing (Ra≤1.6μm).

Industry Applications

This solution demonstrates our expertise in precision thin-wall end cap manufacturing, ideal for:
✓ Servo motor end caps ✓ Flange covers and closures ✓ Bearing housings ✓ Precision actuator components

Why Partner With Us?

• Proven expertise in thin-wall disk machining with warpage prevention
• Advanced front-back feature coaxiality control through datum-based flipping
• Low-stress fixturing solutions for distortion-free clamping
• 12+ years of precision manufacturing experience across motion control and automation sectors