Before

CNC-machined 440C stainless steel aerospace sleeve before deburring with burrs present on machined openings and cross-hole features.
Close-up of a machined cross-hole feature on a 440C stainless steel aerospace sleeve showing burrs prior to deburring.

After

440C Aerospace Sleeve – After Deburring
Close-up of a deburred cross-hole feature on a 440C stainless steel aerospace sleeve with clean edges and improved surface condition.

Objective

A precision aerospace manufacturer in the Southwest Michigan region needed a repeatable deburring process for CNC-machined 440C stainless steel sleeve components before heat treatment. The goal was to remove machining burrs, achieve the required edge breaks per print, and improve consistency across complex machined openings and cross-hole features.

IndustryAerospace/Defense, Machine Shop Applications
Part DescriptionSleeve Cross-Hole
Fabrication MethodCNC Machined, Swiss Screw Machined
Material Steel Alloy 440C per AMS-5630
Process TypeDeburring
Equipment TypeHarperizer, Centrifugal Disc Finisher

Solution

Bel Air evaluated high-energy finishing technologies for deburring CNC-machined 440C stainless steel aerospace sleeves, including centrifugal barrel finishing (Harperizer) and centrifugal disc finishing. The focus was on removing burrs from machined openings, cross-hole features, and other critical edges before heat treatment.

The parts required consistent edge breaks and burr removal without damaging critical features. Bel Air developed a controlled finishing process that removed burrs from internal and external surfaces while maintaining part detail and overall geometry.

The final process produced clean, repeatable edge conditions ready for heat treatment. The process reduced manual deburring, improved consistency from part to part, and provided a more efficient finishing solution.