Through abrasive flow machining, Extrude Hone AFM can direct abrasive media through the same internal pathways that contain unwanted machining burrs.
This allows the process to reach cross-hole intersections, channels, cavities, and other features that may be inconvenient or impossible to finish manually.
Deburring From the Inside Out

An operator can see an external burr, bring a tool to the edge, and inspect the result.
Internal geometry creates a much different challenge.
If a burr occurs at an intersection inside a manifold, for example, there may be no practical straight-line path for a cutting tool.
Abrasive flow machining solves the access problem by using a flexible finishing medium.
The media travels through the component and performs the finishing action along the flow path.
What Types of Features Can AFM Deburr?
Possible applications include:
- Cross-drilled holes
- Internal passages
- Hydraulic manifolds
- Valve bodies
- Fuel and air passages
- Precision dies
- Mold features
- Pump components
- Complex machined parts
AFM can also radius sharp edges and improve surface finish where the application requires more than simple burr removal.
Manufacturing Applications in the Inland Empire

Manufacturers serving these industries may produce components with increasingly complicated internal geometry.
When internal burrs become a bottleneck in the finishing process, outsourcing AFM to Extrude Hone AFM can provide access to specialized equipment and process expertise without bringing abrasive flow machining in-house.
Because Extrude Hone AFM operates in Paramount, California, Inland Empire manufacturers also have relatively close access to the processing facility compared with customers elsewhere in the country.
Process Variables Matter
Flow deburring must be tailored to the workpiece.
Media that is appropriate for one component may not be appropriate for another.
Extrude Hone AFM evaluates:- Component material
- Internal geometry
- Passage dimensions
- Burr size and location
- Desired edge condition
- Required surface finish
- Production needs
Tooling then establishes the correct flow path, while media and processing parameters control the finishing action.
Consistent Deburring for Repeated Parts
An AFM process can be particularly helpful when a component is produced repeatedly.
Once the process is developed, the same internal features can be treated under controlled conditions rather than relying entirely on manual technique.
That can improve repeatability while reducing labor associated with difficult-to-reach burrs.
Call (562) 531-2976 to discuss San Bernardino, CA flow deburring services with Extrude Hone AFM.
FAQs
Can AFM deburr cross holes?
Yes. Internal cross-hole intersections are well suited to flow-based deburring when the media can be directed through the relevant passages.
Can AFM also smooth a passage?
Yes. Abrasive action can provide surface improvement in addition to edge conditioning.




