01
Does your assembly bind on a sharp edge?
A rolled burr on a bore or shaft shoulder adds 0.02–0.05 mm. The press operator feels resistance, adds force, and scores the mating surface. Both parts get scrapped, not just one.
Edge Finishing & Deburring
Methods Deburring Parts on the Shop Floor
Burrs are not a cosmetic problem. They shift fits, trap particles and start cracks. We match the deburring method to your material, edge spec and run size, then verify the edge before the parts ship.
Manual to thermalEdge break 0.05–0.2 mmRa 0.2–1.6 μmPrototype to 10,000+
15 yearsDeburring and finishing experience
127High-precision CNC machines
±0.005 mmTolerance held after edge work
99.99%Qualification rate
Where burrs cost you
Four failures that trace back to the edge
Every one of these shows up after machining is finished, when the fix is expensive.
02
Are you finding metal slivers in a cleanroom build?
Loose burr fragments pass a wash and settle inside a manifold or a hydraulic passage. They later migrate and block a filter or scratch a seal face. Cleaning the part again costs more than deburring it correctly the first time.
03
Do your parts fail fatigue testing at the fillet?
A sharp intersection concentrates stress. Under cyclic load the crack starts at the burr root, not at the machined surface. Polishing the visible faces does nothing if the internal edge stays sharp.
04
Is hand deburring eating your margin?
One operator with a file and a scraper holds the whole order. Edge quality drifts between shifts, and a 2,000-piece run takes days. Volume work needs a method that does not depend on one person's wrist.
How we choose a method
Match the deburring method to the edge, not to habit
Three inputs decide the process: where the burr sits, what the edge must do, and how many parts you need.
Reach and access
If the burr is hidden, the method has to reach it
External edges are easy. A file, a belt or a vibratory bowl will handle them. The problem starts at cross-drilled holes, internal corners and blind slots, where no hand tool or grinding wheel can physically reach the burr root.
For those features we use abrasive flow machining. A putty-like abrasive medium is pushed back and forth through the internal passage at controlled pressure. It laps the burr from both directions and leaves a controlled radius instead of a sharp edge.
- 1Cross-drilled holesMedia passes through the intersection and rounds both edges
- 2Blind slotsTwo-way flow cycles cover the closed end
- 3Typical resultEdge radius 0.02–0.1 mm, surface improved one to two Ra steps
Heat and chemistry
When every edge must be treated at once
High-volume parts with many intersecting edges are a poor fit for any tool that touches one edge at a time. Thermal energy deburring puts the parts in a chamber, fills it with a combustible gas mix, and ignites it. The flash lasts a few milliseconds and burns off burrs wherever the gas reached.
Electrolytic deburring works differently. The part is the anode in a salt solution, and current density is highest at the burr tip because the tip is closest to the cathode. The burr dissolves first. Hard-to-reach edges come out rounded, and the parent surface is barely touched.
- 1Best fitMany small burrs, complex geometry, run sizes in the thousands
- 2Watch outHeat and chemistry also act on thin walls and soft tempers
- 3VerificationEdge radius checked on a sample before the full batch runs
Method selection
Deburring method by burr location and edge spec
Start from the feature, not from the equipment list.
| Method | Reaches | Typical edge result | Good for |
|---|---|---|---|
| Manual file and scraper | External edges only | Chamfer 0.1–0.3 mm, operator dependent | One-off parts, repair work |
| Belt and wheel grinding | External faces, open corners | Radius 0.2–0.5 mm | Weld prep, heavy flash |
| Vibratory and tumbling | All exposed surfaces | Uniform radius 0.05–0.2 mm | Small parts in bulk |
| Abrasive flow machining | Internal passages | Radius 0.02–0.1 mm | Cross-drilled holes, manifolds |
| Thermal energy deburring | Every gas-reached edge | Burr removed, oxide film left | Complex parts, high volume |
| Electrolytic deburring | Burr tips and sharp edges | Rounded edge, base metal intact | Hardened parts, burr-sensitive fits |
| Ultrasonic deburring | Cavities and fine features | Light radius, low mechanical load | Thin walls, brittle materials |
| High-pressure water jet | Internal channels | Burr removed, no heat | Cleaning plus deburring combined |
What we run
Deburring and edge finishing services
Six capabilities, quoted together with the machining so the edge spec is never an afterthought.
01
CNC machining with deburring in the process
Tool paths are planned so the burr is small or lands on a face that will be cut again. Less burr to remove later means lower cost per part.
02
Manual edge finishing
Files, scrapers and rotary tools for chamfers, edge breaks and touch-up on low-volume or repaired parts.
03
Vibratory and tumble finishing
Bulk runs of small and medium parts get a uniform edge radius plus a light surface blend in one cycle.
04
Abrasive flow machining
Internal passages and cross-holes are lapped where no tool can reach, with the radius controlled by media grit and cycle count.
05
Thermal and electrolytic deburring
Whole-part edge treatment for complex geometry and high volume, with sample verification before the full batch.
06
Surface finishing
Bead blasting, brushing and polishing after deburring, so the finish does not re-sharpen or hide an edge that was never corrected.
Scope and limits
What each deburring job includes
| Item | Included | Notes |
|---|---|---|
| Edge break specification | Drawing callout or shop default | Default 0.1 mm × 45° unless stated |
| Edge inspection | Visual plus radius check on samples | Reports on request |
| Surface roughness after deburring | Ra 0.8–1.6 μm typical | Ra 0.2–0.8 μm with polishing |
| Part size | Up to 4,000 mm | Larger parts handled on the machine |
| Run size | One prototype to 10,000+ parts | No minimum order quantity |
| Materials | Aluminium, stainless, steel, copper, titanium, plastics | Soft tempers need gentler methods |
| Documentation | Inspection report, material cert on request | NDA available on request |
| Lead time | Parts ship in 3–5 days | Quote and DFM within 12 hours |
Why GreatLight
Deburring that holds the tolerance you already paid for
±0.005 mm
Edge work that stays inside tolerance
Deburring removes material. We plan the stock allowance for it, so a chamfer or radius does not push a critical dimension out of spec.
15Y
Fifteen years of edge problems
Founded in 2011. Medical, aerospace and hydraulic work taught us which features fail inspection and why.
127
Machining and deburring under one roof
127 high-precision CNC machines plus in-house finishing. The edge spec travels with the job instead of going to a third party.
100%
Inspection before shipment
Raw material check, in-process monitoring and final inspection on every order. Burr and edge checks are part of the final step.
ISO 9001
Documented process control
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. Process parameters are recorded and repeatable.
3–5 days
Short runs without the wait
Quotation and DFM feedback within 12 hours. Production can start within 24 hours. Historical late-delivery probability below 2%.
7,600 m²Manufacturing space
3Wholly-owned plants
150Technicians
16Simultaneous 5-axis centers
Industry edge requirements
What different industries require, and what we deliver
Medical devices
No loose particles, no sharp edges on anything the operator handles.
- Edge radius verified
- 100% inspection
Automotive and EV
Internal passages must stay clear, and fatigue-critical fillets must be burr-free.
- IATF 16949
- Internal deburring
Aerospace
Sharp intersections drive crack initiation, so fillets are called out on the drawing.
- Fillet radius held
- Traceable process
Industrial machinery
High-volume parts need the same edge on part one and part ten thousand.
- Edge break 0.1 mm
- Bulk finishing
FAQs
Questions engineers ask about deburring
Which deburring method should I specify on the drawing?
Specify the edge result, not the process. A callout like 'break all edges 0.1 mm' or 'radius 0.2 mm max at intersection of Ø5 cross-hole' tells the shop what to achieve.
We then pick the method. If you name a process and the geometry cannot support it, the edge spec is what gets negotiated, and that is a worse conversation.
Can deburring change a dimension I already hold to ±0.005 mm?
Yes, if it is applied blindly. Any abrasive or chemical process removes base metal, not just the burr.
We leave stock for the edge operation on dimensions that sit close to the limit, or we mask those features. On critical fits, the deburring allowance is written into the process plan before the first cut.
Is thermal energy deburring safe for thin walls?
It depends on wall thickness and material. The flash is brief, but the edge of a thin wall heats faster than a thick section.
We run a sample from the actual batch and check for distortion and oxide before releasing the full run. Very thin walls usually go to a gentler method.
Do I need deburring at all if the part is not a wear or fatigue item?
If the part is handled, assembled or cleaned, yes. Burrs cut gloves, jam feeders and shed particles into wash tanks.
For purely cosmetic parts with no fit, a light edge break is usually enough and costs very little.
How do you verify that a burr is actually gone?
Visual check under magnification for external edges, plus a radius or edge-break measurement on samples. Internal passages are checked by flow test or by sectioning a sample part.
Inspection reports are available on request. On high-volume runs we verify the setup, then monitor during production rather than inspecting every edge by hand.
Can deburring be combined with surface finishing in one order?
Yes, and it should be ordered in the right sequence. Deburr first, then bead blast, brush or polish. Anodizing, plating, powder coating and black oxide all go after the edge is corrected.
Finishing over a burr hides the edge. It does not remove it.
What does deburring add to lead time and cost?
Manual deburring on a complex part can add hours. Bulk methods add a fixed cycle and scale well with quantity.
It is cheaper to reduce the burr at the machining stage than to remove it later. Tool path, cutter choice and feed rates all affect how much burr you start with.
What information do you need to quote a deburring job?
The drawing with edge callouts, the material and temper, the quantity, and which features matter. Photos of a first article help when the burr is in a hard-to-describe location.
Send the files and we return a quotation with DFM analysis within 12 hours.
Send us the edge spec, we will pick the method
Upload your drawing and quantity. You get a quotation with DFM analysis within 12 hours, and a process plan that names the deburring method before the first cut.
12-hour quote100% inspectionNo minimum order quantityNDA on request
