DEBURRINGMETAL PARTSInternal · External · Edge Finishing
Burr removal and edge finishing of metal parts — including critical locations at cross-hole intersections inside the part. Depending on the process, the result is complete burr removal, chamfering, or a precisely defined radius.
A burr is an undesired excess of material formed during drilling, milling, turning, stamping or die casting. It can appear on external edges as well as inside the part — at cross-hole intersections, where it can cause leakage, restricted media flow, assembly problems or particle contamination of the system.
Deburring is therefore a critical step in the manufacture of precision components for hydraulics, pneumatics, automotive and other technical applications. This site covers the full range of deburring technologies — including thermal deburring (TEM), chemical (CBE), electrochemical (ECM) and cryogenic deburring.
Looking for thermal deburring? We explain the TEM principle and when it is the right choice — particularly for cross-hole burrs, hydraulic manifolds and engine components.
Knowledge base
More than 14 deburring technologies documented.
Each method has a different application — it depends on material, part geometry and required precision.
Cross-hole
Burrs
When two drilled channels intersect inside a part, a burr forms at the intersection that cannot be removed manually. This is the most demanding scenario in deburring — and one of the most critical in hydraulics, pneumatics and fuel systems.
A burr at a cross-hole can break off under operating pressure and contaminate the system, restrict flow, cause valve malfunction or damage seals. Thermal deburring (TEM) is specifically designed for this application.
TEM Technology — Cross-hole SpecialistSystem contamination
Burr particle release under operating pressure — valve and seal damage.
Flow restriction
Protruding burr reduces effective bore diameter and disrupts laminar flow.
Pressure drop
Turbulence at the intersection causes undesirable pressure losses.
Leakage risk
A burr at a seal seat prevents proper sealing surface contact.
Precision Deburring
Technologies
Three key technologies for demanding deburring applications in hydraulics, automotive and precision engineering.
Thermal Deburring
TEM — Thermal Energy Method
Controlled gas combustion in a sealed chamber. All burrs throughout the entire part — including deep cross-holes — are incinerated in milliseconds. The preferred method for complex internal geometries.
Electrochemical Deburring
ECM — Electrochemical Machining
Precisely targeted burr removal using controlled electrical current in electrolyte. No heat, no tool marks — ideal for precision hydraulic and pneumatic valves.
Chemical Deburring
CBE — Chemical Deburring
Selective dissolution of burrs through chemical reaction. Thin burrs dissolve preferentially due to their higher surface-to-mass ratio — clean, stress-free result.
What Is a
Burr?
A burr is any undesired protrusion of material beyond the nominal part geometry. It forms wherever a cutting tool exits the material — at bore edges, intersections, slots, and stamped holes.
Burr size and form depend on material hardness, tool sharpness, cutting parameters and geometry. Even a small burr at a critical location can cause assembly failures, functional problems or safety risks.
Drilling burr
Forms at bore entry and exit. External burrs are manageable; the internal intersection burr is the challenge.
Milling burr
Thin, sharp material projecting at the end of a milled slot or pocket. Hard to remove uniformly at scale.
Stamping burr
Material displaced along the punch edge. Height depends on clearance and punch sharpness.
Die-casting flash
Thin membrane at parting lines and gate locations. Critical for automotive plastic parts.
Benefits of
Proper Deburring
- System cleanliness — no particle contamination
- Correct fit and assembly tolerance compliance
- Improved media flow through hydraulic channels
- Extended seal and component service life
- Improved fatigue strength (defined radius)
- Coating and surface treatment quality
- Compliance with technical cleanliness standards
Risks of
Skipping It
- Burr release and hydraulic system failure
- Assembly rejection — parts that do not fit
- Seal damage — leakage and pressure loss
- Reduced fatigue life — stress concentration at sharp edge
- Coating defects — adhesion failure at burr location
- Field warranty claim and recall risk
- Technical cleanliness audit failure
How to Select the
Right Technology
Every burr, material and geometry requires a different approach. These six criteria guide the selection process between available deburring technologies.
Part material
Steel, aluminium, zinc, plastics or elastomers — material fundamentally influences technology selection.
Burr location
Key factor: external edge, internal burr, cross-hole intersection, or fine parting-line flash.
Required quality
Different processes for safe touch, defined radius, media flow, or surface preparation for coating.
Batch size
Process economics differ significantly between prototype, small batch and high-volume production.
Surface sensitivity
For plastics and decorative parts, minimise mechanical stress and preserve appearance.
Automation
Some technologies suit inline robotic lines; others are better for batch processing.
Site content is based on industrial practice, technological experience, and ongoing consultation with academic and machining specialists. The goal is to provide technically accurate and independent information for selecting the optimal deburring method.
Free Technical
Consultation
Dealing with burrs on your parts? Not sure which deburring method is right for your application? Send us a drawing or a photo — we will evaluate it and advise you, free of obligation.
Describe your part or problem
A brief description is enough — material, machining operation, where the burr forms.
Technical evaluation
We review the specific case and assess which technology makes sense.
Independent technology comparison
You receive an unbiased comparison of suitable deburring methods for your part type, including advantages and limits of each process.