• Sales +49 159 0486 6798
  • admin@metaphoenix.eu
  • Export Machining · Engineering Support

Metaphoenix GmbH

Precision CNC Machined Metal Parts

Custom drawing parts for OEM buyers
Tight tolerance CNC capability
CNC turning/milling & 4-axis machines
Sold to Europe and North America
Send Drawings

Case Studies

CNC Machining Case Studies for Tight Tolerance Parts

Examples of process route changes, fixture planning and inspection decisions for difficult tolerance, thin-wall deformation and casting blank problems.
Send Drawings for RFQ
View Case Studies

Case 01 · Precision cast alloy steel part

Solving phi 40 mm 0 / -0.01 mm tolerance instability

A cast alloy steel part became unstable after cylindrical grinding. The team changed the route to oblique guide CNC machining, then applied 100% checking for the key dimension.
Material

Alloy steel

Blank

Precision casting

Finish

Electroless nickel 8 um +/- 2 um

Case 02 · Thin-wall carbon steel ring

Controlling Deformation and Roundness

For a 260 mm OD, 238 mm ID thin-wall ring, the process used stress release, suitable soft claw & inner support jig design and one-set up oblique guide CNC machining to solve deforming problem and reach surface texture required within short production time.
Material

Carbon steel

Blank

Seamless steel pipe

Finish

Zinc black plating 12 um

What these cases prove

Equipment choice matters when tolerance risk is real

Route Change

The stable route may be different from the first obvious machining plan.

Fixture Strategy

Suitable Soft Claw & Inner Support Jig Design can directly affect final geometry.

Inspection Priority

Critical dimensions need a specific measurement plan, not only final visual checks.

Case 01 details

Precision cast alloy steel part: controlling a 0 / -0.01 mm diameter

The key issue was not whether the part could be machined once, but whether the diameter could remain stable across production after the original grinding route created inconsistent results.
Challenge
Diameter phi 40 mm was not uniform and moved out of tolerance after cylindrical grinding.
Process decision
Normal CNC machining was replaced by oblique guide / slant-rail CNC machining to improve rigidity and process stability.
Quality action
The critical diameter received 100% checking, with the inspection plan focused on the functional feature rather than only final appearance.
Result
The revised route stabilized the required tolerance, reduced production cost and shortened production time.

Case 02 details

Thin-wall ring machining: deformation control before final cutting

Thin-wall rings are sensitive to residual stress, clamping force, eccentricity and out-of-roundness. The practical solution is usually a process system, not one machine parameter.
Stress Release

Stress release after raw material cutting and proof machining reduces movement before finishing.

Fixture Support

Soft claw and inner support jig design help prevent clamping deformation.

One Setup

Slant-rail CNC finishing reduces repeated fixture assembly and eccentricity risk.

Surface Finish

The finishing route supports required texture before zinc black plating.

RFQ support

Send Drawing to Start Your Project

Ready for a quote? Send your drawing, material, qty, tolerances, blank type, and delivery date. We’ll review manufacturability, routing, and QC points — then quote you within 24 hours. All drawings and data are kept confidential. No obligation, just a clear quote.
  • admin@metaphoenix.eu
  • Sales support: +49 159 0486 6798
Metaphoenix GmbH

Precision CNC machining supplier for tight tolerance custom metal parts.