A magnetic conveyor deburring machine is usually the better choice for holding small or heavy carbon-steel parts, while a vacuum conveyor deburring machine is required for stainless steel, aluminum and other non-magnetic sheet metal. Shops processing mixed materials may need a combined holding system or a machine configuration selected around the most difficult recurring part.
The correct conveyor is not determined by material alone. Part size, thickness, flatness, open area, burr direction and the force applied by sanding belts or edge-rounding brushes all affect workpiece stability. Before purchasing a sheet metal deburring machine, buyers should test the smallest, lightest and most perforated parts they expect to process.
Why Workpiece Holding Matters in Deburring
During automated deburring, the conveyor must move the workpiece through the machine while abrasive belts, brushes or other tools apply force from above and sometimes from multiple directions. If the part shifts, lifts or rotates, the result can include missed burrs, inconsistent edge rounding, scratches or a machine stop.
This makes the conveyor more than a transport belt. It is part of the finishing process.
A suitable sheet metal holding system should:
Keep the smallest approved part stable; Prevent thin parts from lifting into the tooling; Maintain consistent feed speed; Support the required material range; Allow dust and residue to be managed safely; Release finished parts without excessive handling.
Buyers often compare working width, motor power and the number of processing heads first. For mixed-part production, however, conveyor holding can determine whether those processing heads can be used effectively.
How Does a Magnetic Conveyor Deburring Machine Work?
A magnetic conveyor deburring machine uses magnetic force beneath the conveyor belt to hold ferrous workpieces against the transport surface. It is mainly intended for carbon steel and other magnetic materials.
The magnetic field helps resist movement when abrasive belts or rotary brushes contact the part. This can be particularly valuable for small carbon-steel components, narrow strips and parts exposed to strong multi-directional brush forces.
Advantages of Magnetic Holding
- Strong holding force on suitable carbon-steel parts
- Effective support for smaller or heavier ferrous components
- No dependence on sealing the part surface against airflow
- Open profiles and cutouts generally have less effect on magnetic holding than on vacuum coverage
- Useful for aggressive deburring, deslagging and edge-rounding configurations
Limitations of Magnetic Holding
It does not hold aluminum, austenitic stainless steel or other non-magnetic materials; Holding force varies with material properties and distance from the magnetic source; Very thin parts still require testing for flatness and safe release; Residual metal particles should be considered in cleaning and maintenance.
A magnetic conveyor should therefore be selected from actual material samples, not simply from the label “steel.” Some stainless-steel grades are weakly magnetic after processing, but this does not guarantee reliable conveyor holding.
How Does a Vacuum Conveyor Deburring Machine Work?
A vacuum conveyor deburring machine creates negative pressure through openings beneath the conveyor surface. Airflow pulls a flat workpiece toward the belt and helps keep it stable as it passes through the processing modules.
Vacuum holding can be used for aluminum, stainless steel and other non-magnetic sheet metal. It is often considered when a fabrication shop processes multiple materials on the same machine.
Advantages of Vacuum Holding
- Works with both magnetic and non-magnetic materials
- Suitable for aluminum and stainless-steel deburring applications
- Supports mixed-material production without relying on magnetic properties
- Can hold relatively thin flat parts when sufficient surface area is available
- Provides a flexible platform for general sheet metal finishing
Limitations of Vacuum Holding
Holding depends on the surface area covering the vacuum zone; Highly perforated parts or open frames may allow excessive air leakage; Warped parts may not seal consistently against the conveyor; Very small parts can require a dedicated test; Filters, ducts and vacuum components require inspection and maintenance.
The word “vacuum” does not automatically mean every aluminum or stainless-steel part can be processed safely. A large flat panel and a narrow perforated bracket create very different holding conditions.
Magnetic vs Vacuum Conveyor: Practical Comparison
| Selection factor | Magnetic conveyor | Vacuum conveyor |
|---|---|---|
| Carbon steel | Usually well suited | Possible when surface area is sufficient |
| Stainless steel | Generally unsuitable for non-magnetic grades | Usually the preferred option |
| Aluminum | Not suitable | Usually the preferred option |
| Small ferrous parts | Often provides stronger holding | Depends on covered vacuum area |
| Highly perforated parts | Less affected when material is magnetic | Air leakage may reduce holding |
| Mixed materials | Limited | More flexible |
| Maintenance focus | Magnetic surface and metal-particle control | Filters, ducts, seals and airflow |
| Best confirmation method | Sample test | Sample test |
Which Conveyor Is Better for Small Parts?
There is no universal minimum part size for every deburring machine. Safe processing depends on the part’s length, width, thickness, weight, material and percentage of open area, as well as the tooling direction and pressure.
For a small carbon-steel part, magnetic holding often provides a clear advantage because the holding force does not depend on the part sealing a large vacuum area. For a small aluminum part, vacuum is the practical choice, but the available surface area must be sufficient.
When evaluating a small part deburring machine, buyers should provide:
- Minimum length and width
- Material and thickness
- Part weight
- Photographs or drawings showing cutouts
- Required deburring and edge-rounding operations
- Burr location and direction
- Expected batch size
The smallest normal production part should be included in the sample test. Testing only the largest plate can hide the most important conveyor limitation.
Which Conveyor Is Better for Aluminum Parts Deburring?
Aluminum is non-magnetic, so a magnetic conveyor cannot provide the required holding. A vacuum conveyor or another mechanical holding solution is needed.
For aluminum parts deburring, the test should also consider:
Whether the part is flat enough for stable vacuum contact; Whether large openings reduce the effective holding area; Whether the surface is cosmetic and must remain scratch-free; Whether thin parts can distort under processing force; Whether the selected abrasive is appropriate for aluminum; How aluminum dust will be collected and managed.
Do not select a vacuum conveyor from material name alone. Send the most open, smallest and thinnest aluminum components for testing.
Which Conveyor Is Better for Stainless Steel Deburring?
Many stainless-steel parts, especially common austenitic grades, cannot be held reliably by a magnetic conveyor. Vacuum holding is therefore commonly used for stainless steel deburring and edge rounding.
Surface requirements are often important on stainless steel. If the visible face must remain free from belt marks, the machine test should confirm conveyor cleanliness, contact points and the finishing direction. Parts going to brushing, welding or coating may require different settings.
For stainless-steel edge requirements, see sheet metal edge rounding for stainless-steel parts.
When Does a Combined Magnetic and Vacuum System Make Sense?
A combined system may be useful for fabrication shops that process carbon steel, stainless steel and aluminum on the same production line. Magnetic holding can support demanding small carbon-steel parts, while vacuum coverage provides flexibility for non-magnetic materials.
However, a combined system should still be evaluated against the real production mix. Buyers should ask:
- Can magnetic and vacuum zones operate independently?
- What portion of the working area is covered by each holding method?
- Can the smallest part be positioned over the effective holding zone?
- Does the conveyor arrangement restrict maximum part width?
- How are settings changed between materials?
- What cleaning is needed when switching between carbon steel, stainless steel and aluminum?
A machine with more holding options is not automatically the better purchase if most production uses only one material. The best configuration is the one that safely covers the real part mix without unnecessary complexity.
Sample-Test Checklist for Conveyor Selection
Before ordering, ask the supplier to test a group of representative parts rather than a single easy sample.
| Sample type | What it tests |
|---|---|
| Smallest part | Minimum safe holding and tool contact |
| Thinnest part | Flatness, lifting and distortion risk |
| Most perforated part | Vacuum leakage or reduced magnetic contact area |
| Heaviest part | Conveyor load and transport stability |
| Part with the largest burr | Stability under the highest normal processing force |
| Cosmetic-surface part | Scratch control and conveyor cleanliness |
Record the conveyor type, tooling, feed speed, number of passes and final result. A continuous test video is useful because it shows whether a part shifted or required manual repositioning.
Lasvio Conveyor Options for Sheet Metal Deburring Machines
Lasvio manufactures sheet metal deburring and edge-rounding machines for laser-cut, plasma-cut and other fabricated parts. Conveyor and holding configurations are selected around the customer’s material mix, smallest part, working width and required finishing modules.
Depending on the application, magnetic holding can be used for carbon-steel parts, while vacuum support can provide flexibility for stainless steel, aluminum and other non-magnetic materials. Some production requirements may benefit from a combined arrangement.
Learn how to configure a sheet metal deburring machine, explore Lasvio edge-rounding solutions, or send us your part drawings and material list for a sample-test recommendation.
Frequently Asked Questions
Can a magnetic conveyor hold stainless steel?
Some stainless grades may show limited magnetic response, but many common austenitic grades cannot be held reliably. Conveyor selection should be confirmed with the actual material rather than the material name alone.
Can a vacuum conveyor hold very small parts?
It depends on the surface area covering the vacuum zone, part geometry, airflow and processing force. The smallest recurring part must be tested.
What is the best conveyor for carbon-steel deburring?
Magnetic holding is often advantageous for carbon steel, particularly for smaller parts or stronger tool contact. Vacuum can also work when the part provides sufficient surface area.
What is the best conveyor for aluminum deburring?
Aluminum requires vacuum or another non-magnetic holding method. Part flatness, open area and surface requirements should be included in the test.
Does a perforated part work on a vacuum conveyor?
It may, but large openings can reduce the pressure difference available for holding. The actual pattern and size must be tested.
Can one deburring machine process carbon steel, stainless steel and aluminum?
Yes, when its holding system, tooling, dust management and operating settings suit the complete material mix. A combined magnetic and vacuum configuration may be appropriate for some shops.