Optimizing Edge Rounding on Laser-Cut Sheet Metal Using the DM1100 C

 The DM1100C Edge Rounding Machine was recently tested to achieve an edge rounding radius of 0.3-0.5mm on stainless steel parts for a customer specializing in precision sheet metal fabrication and enclosures, particularly for laser-cut components that require precise edge rounding for improved handling and coating adhesion. The primary requirement was to obtain a uniform edge rounding while maintaining the integrity of the parts, which typically do not have burrs, making a Deburring Contact Roller or abrasive belt station unnecessary. Due to the high precision of modern fiber laser-cutting machines, burr formation is minimal, eliminating the need for additional heavy-duty deburring processes, as the laser-cut edges are already clean and sharp, requiring only edge rounding to ensure smoothness.

Testing Parameters and Process

The customer specializes in high-precision laser cutting and sheet metal processing, producing components for industries such as electronics, industrial equipment, and mechanical assemblies. Their operations require smooth edge rounding to ensure compatibility with downstream processes like bending, welding, and assembly., requiring precise edge rounding to improve handling and surface treatment results. Ensuring smooth and uniform edges is crucial for avoiding sharp edges in assembly processes and enhancing coating adhesion.

The samples were categorized into two groups:

1. Samples A to D: Maintained the same process conditions while varying pressure and speed.
2. Samples E, F, and G: Also followed a standardized set of conditions, focusing on different material interactions.~

Sample A after tests

Sample G after tests

To optimize edge rounding on laser-cut precision components used in enclosures, brackets, and structural elements, two different crossbelt consumable types were tested:

• Green Flex: A flexible mix of 40/60G abrasive + green fleece, designed for a more controlled material removal and edge rounding process.
• Violet Plus: A 3-row cut design with 60G ceramic + purple fleece, known for its efficiency in edge rounding applications.

Green Flex Block

Violet Plus Block

The tests were conducted at speeds between 1 m/min and 3.2 m/min to evaluate the impact of different throughput speeds on edge rounding efficiency.

Results and Best Performances

From the test results, samples B and F produced the most consistent and high-quality edge rounding:

• Sample B (Green Flex): The reduced feed speed combined with increased pressure resulted in superior edge rounding, surpassing previous tests in uniformity and smoothness.
• Sample F (Violet Plus): With one pass and a lower feed speed than the previous sample, this test provided the best overall combination of edge rounding and surface quality.

Sample B: edge rounding detail

Sample F: edge rounding detail

Choice of Consumables: Why Violet Plus?

When processing thicker parts, Green Flex is ideal as it allows for higher pressure applications, such as 3.7mm of pressure, effectively reaching below the surface without affecting the integrity of the part.

For thinner parts (2mm thickness), applying excessive pressure (e.g., 1.5mm) could risk contact with the conveyor belt, potentially damaging it and leading to a suboptimal rounding result.

By utilizing Violet Plus, which contains harder abrasives, we were able to reduce the pressure to just 0.5mm while still achieving a similar edge rounding effect to that of Green Flex.\

Throughput Speed Selection: Why 1 m/min?

• We tested speeds between 1 m/min and 3.2 m/min to determine the best balance between efficiency and edge rounding quality.
• Higher speeds resulted in less uniform rounding, leading to inconsistent edges.
• 1 m/min provided the most uniform and consistent rounding, ensuring a smooth and controlled finish.

The DM1100C Edge Rounding Machine successfully delivered a 0.3-0.5mm edge rounding with a high degree of consistency, meeting the customer’s expectations for laser-cut sheet metal components that require precise edge refinement for handling and further processing. However, the DM1100 C only features top crossbelt processing, meaning edge rounding is applied from above, but not on the underside of the part.

For an optimized and more efficient solution, the DM1600 2C EVO is recommended. This model features two crossbelt stations, allowing for simultaneous top and bottom edge rounding, ensuring a fully uniform finish on both surfaces. With a wider 1600mm working capacity, it can handle larger parts while maintaining the same precision and efficiency.

This edge rounding system is particularly effective for manufacturing applications, where sharp edges must be smoothed to meet functional and aesthetic requirements in industries such as aerospace, medical technology, and custom metal fabrication., ensuring optimal surface preparation for powder coating, anodizing, and other protective coatings, improving adhesion and corrosion resistance. Many industries, including precision sheet metal fabrication, electronics enclosures, and industrial equipment manufacturers, rely on crossbelt edge rounding technology to achieve high-quality radiused edges, essential for safe handling, improved assembly fit, and superior coating performance.

These results confirm the effectiveness of the DM1100 C in post-laser-cut processing, ensuring consistent edge preparation for parts used in automated assembly lines, robotic welding systems, and precision-fitted mechanical structures., particularly for laser-cut sheet metal parts that require precise finishing for improved safety, assembly efficiency, and coating performance. However, the DM1600 2C EVO is the ideal solution for customers requiring double-sided edge rounding, offering top and bottom processing for increased productivity and uniformity.

If you want to know more about this test, visit our contact page on the website https://nsmaquinas.com/contacts/ or send us an email directly to marketing@nsmaquinas.pt.

High Radius Steel Plates

Creating a radius up to 2mm is often requested in steel plates as a preparation for powder coating or galvanizing. Achieving this R=2mm brings a much higher cost both in terms of abrasive consumables and in terms of processing time, so it needs to be clear this is really a necessary requirement. 

Several steel construction companies working on steel plates cutting for offshore, machine building, cranes construction and other steel fabrication require the deburring and edge rounding of these thick plates after oxy-cut or plasma cut. 

NS Máquinas achieves this result in 2 steps with the steel plated deburring and edge rounding machines DM1100 DC and DM1100 DCC or variations of these models which makes the steel metal sheets deburring and edge rounding faster.

Oxy Cut steel plate before deburring

1st: DM1100 DC contact drum eliminates heavier burrs by concentrating the pressure on the edges of the steel plates (oxy cut or plasma cut).

2nd: Once deburred, with a sequence of edge rounding abrasive brushes DM1100 DC creates a big radius on steel parts. 

See the results below:

DM1100 DCC 2.5mm radius 

The deburring and edge rounding process is relatively slow (conveyor belt speed under 0.5m/min), but the rounding is extreme and consistent. 

Measuring radius on steel oxy cut part

DM1100 DCC deburrs, deslags and edge round thick steel plates oxy cut or plasma cut. Its deburring solution and concept is quite unique and specially dedicated for thick steel plates deburring and edge rounding. The large diameter deburring drum D (Ø435mm) with extra soft rubber concentrates the pressure on the edges where the burr is located, leaving the surface of the material lightly touched only. Deburring contact drum floats every time there is extra pressure or to cope with small tolerances on the metal. This is particularly important in thick steel plates,

Edge rounding result is achieved by a sequence of abrasive tools assembled on a cross belt system. The pressure made by the deburring and edge rounding blocks, guided by a system where the pressure is controlled is key to achieve high edge rounding results. With different speeds we can obtain roundings from 1.8 to 2.3mm.

Contact us at marketing@nsmaquinas.com for further details or visit www.nsmaquinas.com 

Deburring Aluminum Extrusions

Deburring of the side of a thermal dissipation part used in an auto radio

Aluminum Extrusion Before Cutting Process

This small aluminum part has sharp edges all around the sides. This was due to the aluminum cutting process to create it.
Giving this, the customer needed to remove sharp edges and small burrs from this aluminum extrusion part.

NS DM1100 C edge rounding standard machine for edge rounding of metal sheets and small parts was the solution found for the edge problem. Due to the shape of the aluminum part it was not possible to put it in a straight position. In combination with guides on the top side of the conveyor table was enough to guarantee that the parts would be in the vertical position.

Frontal Part of the Deburring Machine - Guides for the Alumin Extrusions

The cross belts system combining two belts running in opposite directions are enough to deburr and remove sharp edges from this small part. The final result is a smooth edge due to the edge rounding process.

After and Before Process of Deburring Aluminum Extrusion

In combination with a special parts return system, the operator fed the parts in the table and then passes through the return system. After the inspection, the operator flips the part in order to deburr the other side. The parts return system enables the machine to operated with just one worker instead of several.

Parts Return System for Small Parts Inspection and Double Side Edge Rounding

For more information please visit our website: www.nsmaquinas.com or contact us at marketing@nsmaquinas.com

DM1100 2C: Double Side Edge Rounding Machine

DM1100 2C cross belt edge rounding machine deburrs the two sides of the part in one single pass. It removes sharp edges on both external and internal contours of stainless steel, steel or aluminium parts either cut in laser, shear or punching machine.

This deburring machine has two stations with double cross belts for edge rounding, leaving clean, soft and burr-free edges on the complete parts.

This machine can do double side edge rounding and deburring of parts longer than 150mm. Also, DM1100 2C can do single side edge rounding exactly like DM1100 C in parts as small as 50mm

The touchcress control enables single side or double side operation modes and automatic cross belts replacement position.

See more of this machine on the video below.

Contact us for more details at marketing@nsmaquinas.com

Oxide Removal Cross Belt Machibe

DM1100 CT Oxide Removal Cross Belt Machine

 DM1100 CT is a single side cross belt machine which removes oxide layer from oxygen laser cut steel parts both on the inside and outside areas.

Also, by replacing the cross belt set for edge rounding type this machine can remove sharp edges of stainless steel, steel and aluminium parts cut by laser, punching or shearing. This deburring machine can work parts longer than 180mm and as a table with 1100mm width. For smaller parts edge rounding please contact us for our DM1100 C.

Principle of work: 2 v-belts with abrasive blocks or oxide removal wire brushes running in opposite directions guarantee that all sides on the top surface and upper half thickness will be cleaned from oxide or edge rounded  in one single pass.

Both sides, single side and before oxide removal steel samples

Oxide Removal: removing oxide layer from thickness of steel parts up to 8mm in one pass or up to 16mm in 2 passes. Cleans simultaneously internal holes.


For more information on our oxide removal machines email us at marketing@nsmaquinas.com

DM660 ZPK: Deburring, Edge Rounding, Finishing and Oxide Removal Machine

DM660 ZPK is a deburring machine for sheet metal and parts cut by punching, shearing, laser or plasma.

DM660 ZPK features an integrated vacuum table and a 3 movement system of the brushing head, assuring a high consistency. It is possible to work parts up to 660mm width and some as small as 50x50mm.

This machine can perform rounding on small holes, bended plates and create big radius up to 2mm.

By blocking the rotation head this machine can be used for surface finishing in a configuration of wide belt and double parallel brush.

On DM660 ZPK it is easy to interchange brushes, so it is possible to achieve rounded edges free from burrs or sharp corners but also to clean oxide layer.

When operating with steel planetary brushes DM660 ZPK removes efficiently the oxide layer on interior and exterior contours of laser-cut steel sheets.

DM660 ZPK cleans oxide layer in 2 step operation on parts from 4mm up to 25mm thick.

Preparing steel cut parts for coating by removing oxide layer will improve the ability of the parts to be coated. Powder coating or wet paint adheres well to the oxide layer. However, when the surface is damaged or subject to impacts the oxide layer can detach from the material, limiting the lifetime of the coating.

DM660 ZPK performs oxide removal with flexible and efficient wire brushes, leaving the parts oxide free and ready for further coatings.

See the demonstration video below of this oxide removal machine where steel parts are brushed from oxide.

Get more information at www.deburring.nsmaquinas.com or email us at marketing@nsmaquinas.com

Laser Metal Deburring and Edge Rounding Machine at Foekema

Foekema Plaatbewerking BV is a Dutch company specialized in metal sheet services and fabrication. The company which provides laser cutting, welding and engineering services has just purchased an innovative corner rounding machine from NS Máquinas.

The need for a metal deburring machine was due to the increasing demand in the food industry, where customers like rounded and burr-free laser cut parts, both for hygienic reasons and also in order to eliminate the risk of injury with laser cut sharp edges. On the other hand customers demanded steel parts with rounded edges to assure better adhesion of powder coating and zinc layers. For these reasons Foekema decided to move on to the purchase of the NS Máquinas deburring and edge rounding machine DM1100C.

Mr.  Johan Foekema, managing director of the Dutch company, told us about his option. “After comparing different brands and models the NS Máquinas DM1100C was soon our best choice.”

“In contrast to other metal deburring machines DM1100C edge rounding machine may also process small parts, even dimensions of 25x25mm are feasible! This makes it possible to supply laser cut parts to our customers which are finished and edge rounded both on the outside and on the inside contours with the same surface finishing.  Many other companies tumble small parts which has necessarily a different look.”

One of the benefits that Mr. Foekema points is the fact that he can deburr steel and stainless steel parts with the same machine. DM1100 C has a simple and quick system for abrasives replacement. In less than 3 minutes the edge rounding abrasive cross belts can be replaced, being possible to interchange the abrasive tools for steel and for stainless steel. The manager points: “Both stainless steel and steel parts can be finished and deburred on the same machine. More it is a very easy to clean our metal deburring machine.”

DM1100C edge rounding machine can also deburr stainless steel laser cut parts with plastic foil, leaving the surface untouched. “Parts which were laser cut with film protection are not a problem. The film remains tight and the contours are rounded”.

The NS Máquinas metal deburring machine proves to be also the right choice for many steel parts. According to Mr. Foekema the DM1100 C is “ideal for parts that will be powder coated or galvanized, once with rounded corners and holes there is better adhesion.”

This metal sheet edge rounding and deburring machine has a maximum width of 1100mm and works up of 50mm thickness.

The DM1100C metal deburring machine has a cross belt edge rounding technology because the machine is equpped with two transverse belts. These cross belts have sanding blocks which consist of abrasive flaps with scotch brite. These abrasive tools are designed to provide the removal of the burr and edge rounding of the corners. At the same time the cross belts provide a nice finish, especially in stainless steel.

Regarding the investment on the NS metal deburring machine Foekema has no doubts and concludes “a relatively short operation time with low processing costs”.

In order to know more about the DM1100C deburring and edge rounding machine visit ww.nsmaquinas.com or email us at marketing@nsmaquinas.com 

DM1100 C: Stainless Steel Edge Rounding and Polishing of Laser Cut Parts

DM1100 C Laser Deburring and Edge Rounding Machine

DM1100 C is the ideal machine for creating rounded edges on metals parts with light burrs.

This machine is equipped with a double top cross belt with deburring abrasive blocks which work all edges of parts regardless its shape.

Before and After Edge Rounding with DM1100 C Machine

This technology provides a strong rounding action on parts cut on laser and deliver a high performance in any size of part, including parts as small as 50x50mm.

The action of the abrasive blocks, besides creating a perfect rounded and deburred edge, creates a smooth linear polished finishing. Having the possibility of polishing stainless steel laser cut parts with a very fine touch is great benefit on several applications where aesthetic is important.

Easy and measurable set-up of thickness and pressure and quick replacement of abrasive cross belts (less 3 minutes) are some of the extra benefits the DM1100 C deburring and edge rounding machine brings.

Edge Rounding and Polishing Stainless Steel Laser Cut Part

This product is available in 1100mm and 1600mm max. width capacity (models DM1100 C and DM1600 C) and can edge round laser cut parts but also other parts with light burrs such as parts cut on punching, shearing or plasma machine.

Contact us at marketing@nsmaquinas.com or visit www.deburring.nsmaquinas.com to know more about these metal sheet deburring and polishing machines.

DM1100 ZC: Deburring and Edge Rounding in One Machine

DM1100 ZC: Deburring and Edges Rounding Machine

DM edge rounding machines are available with deburring station before the cross belts.

The soft contact roller Ø240mm can grind away burrs from laser and plasma, while the cross belts will remove sharp edges, rounding them with extreme efficiency. These machines can actually work parts down to 50x50mm.

The stations are independent. This makes possible the operation only for edges rounding (without abrasive belt) and only for parts finishing in a second step after deburring and edges rounding.


These models count with fixed working height, motorized control of thickness and cross belt pressure/wear.

The cross belts are positioned at 35º, which permits the use of the full width of conveyor belt. Parts will not be placed at an angle as it is done with DM1100 C. More, we can have a straight finishing after edges rounding if a 3rd station is required (abrasive belt or brush unit).

This machine is available in 2 sizes: working capacities of 660mm and 1100mm (DM660 ZC and DM1100 ZC).
Check the demonstration video below where a stainless steel laser cut part is deburred and edge rounded. See also more examples at www.nsmaquinas.com

Contact us for more information to the email marketing@nsmaquinas.com

DM660 ZPK Laser Parts Deburring and Edge Rounding Machine

DM660 ZPK Deburring and Edge Rounding Machine

DM660 ZPK is a deburring and edge rounding machine for sheet metal and parts cut by punching, shearing, laser or plasma.

Removing burrs and creating round edges using planetary brushes technology is possible on parts up to 660mm width and on some as small as 50x50mm.

Inside and outside contours of stainless steel, steel and aluminium parts cut by laser or other thermal processes are burrs cleaned from the total surface.

Sample of stainless steel metal sheet edge rounded with DM660 ZPK

DM660 ZPK features now an integrated vacuum table, a re-designed conveyor belt with higher holes density for smaller parts deburring and a 3 movement system of the rounding head, assuring a higher consistency of the parts processed.

Metal sheet deburring, laser cut parts edge rounding, removing burrs and sharp corners and creating soft edges are operations easy to achievable with DM660 ZPK abrasive deburring machine and demonstrated on the video below.

Get more information clicking HERE or email us at marketing@nsmaquinas.com