Deburring
Deburring removes the sharp edges and small ridges of material (burrs) left by machining, cutting, drilling and punching. It makes parts safe to handle, helps them assemble and seal properly, and prevents loose burrs from damaging systems.
What it is
Burrs can be removed by hand with scrapers and files, with brushes or abrasive tools, by vibratory or barrel finishing for bulk parts, or with dedicated deburring machines for sheet parts. Thermal and electrochemical methods are used for internal cross holes.
The right method depends on the part size, quantity, burr location and allowable edge break, often stated on the drawing as a small chamfer or radius.
Typical applications
- Machined and turned components
- Laser-cut and punched sheet parts
- Hydraulic and fuel-system parts (cross holes)
- Gears and splines
- Parts before plating or assembly
Suitable materials
- Steels and stainless steels
- Aluminium
- Brass and copper
- Plastics
Points to consider
- Specify edge break (for example "break sharp edges 0.2–0.5 mm") on the drawing.
- Critical internal cross holes in hydraulic parts need special attention and inspection.
- Bulk parts are most economical in vibratory or barrel finishing.
- Cosmetic faces should be protected from media marks.
Frequently asked questions
Why is deburring important?
Burrs can cut hands, stop parts assembling or sealing correctly, and break loose into hydraulic or moving systems.
How are small parts deburred in bulk?
In vibratory or barrel finishing machines with abrasive media, which deburr hundreds of parts at once.
What does 'break sharp edges' mean?
It asks for a small chamfer or radius, typically around 0.2–0.5 mm, on all sharp edges.