Abrasive bead blasting propels fine spherical glass beads or angular aluminum oxide media at high velocity to remove CNC machining tool marks, eliminate light burrs, and deliver a uniform non-directional matte finish.
Engineering Specifications & Parameters
Applications
Tool mark removal, pre-anodize satin prep, non-glare instrument panels
Spherical glass media (Grit #70 to #120) peens the surface without removing measurable base metal.
Produces a smooth, satin matte appearance (Ra 1.2 to 2.4 microns) that conceals multi-axis toolpaths.
Ideal final finish prior to Type II color anodizing.
Aluminum Oxide Blasting (Aggressive Etching):
Sharp, angular media creates micro-etched surface anchoring profiles.
Mandatory surface preparation prior to powder coating, adhesive bonding, and thermal spray coatings.
Critical Masking Guidelines
Precision bearing bores, dowel holes, and sealing O-ring grooves must be plugged with silicone plugs or threaded caps before blasting to maintain sub-0.01mm tolerances.
Frequently Asked Questions
Why is bead blasting standard before aluminum color anodizing?
Bead blasting creates a micro-dimpled surface texture that scatters light evenly, hiding subtle toolpath lines and producing a rich, uniform matte anodized color.
Will bead blasting damage precision tapped threads?
Direct high-pressure blasting can dull sharp 60-degree crests; critical threads should be plugged with rubber masks or clean-tapped post-blast.
