How long does a burr last?

The service life of a burr cannot simply be expressed as a fixed number of operating hours. At Allmet Safety Tools, service life depends on factors including the type of burr, the application, the surface being treated and the way the tool is used. For some Allmet burrs, practical service-life indications are available. For example, the A-0010 Rough Boy has a stated service-life reference of up to 32,000 corrosion spots measuring 5 × 5 cm. This is a manufacturer reference: actual service life still depends on factors such as the substrate, coating and application technique.

To assess the service life of a burr properly, it is first important to understand exactly what the burr does within an Allmet Safety Tool.

What does a burr do at Allmet Safety Tools?

Within the Allmet Safety Tools system, the burr is the rotating component that comes into contact with the surface during use and removes material. The pneumatic drive brings the burr up to speed, after which the teeth mechanically remove material.

Allmet uses terms such as grinding files, burrs and rotary grinding burrs for these tools. In this article, we refer to these tools as burrs for simplicity.

The relevant Allmet burrs are made from tungsten carbide, also known as hardmetal. This material is widely used for cutting and wear applications because of its combination of high hardness and wear resistance.

The main difference compared with a conventional abrasive grinding disc lies in the way material is removed. With an abrasive disc, the abrasive grains and backing material are gradually consumed during use. An Allmet burr has a solid tool body with cutting teeth. These teeth gradually lose their sharpness during use, while the tool itself may still look almost unchanged.

Applications of Allmet burrs

The different Allmet burrs are designed for various forms of material removal and surface preparation. They are used for tasks including corrosion removal and coating removal, surface preparation, weld work and precision repair work.

Which burr is suitable depends strongly on the surface and the work that needs to be carried out.

The A-0010 Rough Boy is intended for larger flat surfaces and pipes and is used to remove coatings, rust and material during surface preparation. The burr is combined with the A-0108 pneumatic angle grinder.

The A-0004 Little Papa is designed for more precise work in hard-to-reach areas and corners. Its shape makes the burr suitable for tasks including removing sharp edges, following crack lines and working in or around pipes. The Little Papa can be used with the A-0104 Angle Grinder and A-0107 Straight Grinder.

The A-0005 Round Boy is also intended for precision work in corners and hard-to-reach areas. The specific geometry of a burr therefore determines not only where it can be used, but also how much of the cutting surface is loaded during the application.

The combination of drive, burr and application

With Allmet Safety Tools, you should always consider the combination:

drive -> burr -> application

A burr is not a universal consumable that performs the same way on every machine and for every maintenance task. Its performance is linked to the drive on which it is used and to the type of work being carried out.

The drive brings the burr to the correct speed and allows the cutting parts of the burr to make controlled contact with the surface. The burr then determines how the material is actually removed. Shape, diameter and cutting geometry all play an important role. A burr for larger surfaces is loaded differently from a smaller burr used mainly for precision work, corners or hard-to-reach areas.

The A-0010 Rough Boy, for example, is specifically designed for use with the A-0108 Angle Grinder. This combination is intended for work where material needs to be removed from larger surfaces. Smaller burrs, such as the Little Papa and Round Boy, are used when precision and reach are more important than a large working area.

The application is the third factor. Removing light surface corrosion places different demands on a burr than removing a coating, working an edge or carrying out a local repair. The load is influenced not only by the type of material, but also by the amount of material removed and the length of time the burr is actually in contact with the surface.

It is therefore important not only to ask which burr is suitable, but to consider the full combination of drive, burr and application. When these three are properly matched, the burr can work as designed and the available cutting geometry can be used as effectively as possible.

This is also relevant to service life. A burr used for its intended application and with the corresponding drive is loaded differently from the same burr used for work for which another type of tool would be more suitable.

How the application influences service life

The application directly affects how quickly a burr wears. The same Allmet burr can therefore have a different practical service life in two different maintenance situations.

A burr used for a short spot repair in which corrosion is removed only locally has relatively brief contact with the surface. If the same burr is used for a prolonged period on a larger surface treatment or for work requiring more material removal, the cutting edges are subjected to a higher load.

The material that comes into contact with the burr also plays a role. A coating, surface corrosion and base metal do not have the same properties. As a result, the resistance encountered by the cutting teeth can vary by application. The same applies to the condition of the surface. A uniform surface places different demands on a burr than a heavily affected, contaminated or irregular surface.

The amount of material that needs to be removed in a single operation also matters. Light surface preparation removes only a limited layer, while heavier material removal places greater demands on the cutting edges. For this reason, total operating time alone says little about the actual load a burr has experienced.

The way the operator works also has an influence. Pressure, working angle and the movement used to guide the burr across the surface determine how the cutting edges are loaded. If an operator applies unnecessary pressure or repeatedly loads the same part of the burr, wear may develop differently than with even and correct use.

Manufacturer references for service life should therefore always be viewed in the context of the application. An indication such as a certain number of corrosion spots is useful for planning and comparison, but it does not mean that every burr will perform exactly the same amount of work under all conditions.

For maintenance departments, it is therefore often more useful to consider the amount of work completed, the material removal rate and the result per application in addition to operating time. This provides a more realistic picture of the burr’s actual service life.

How long does an Allmet burr last on average?

The service life of an Allmet burr is not determined solely by the number of hours the tool runs. Two burrs may have been used for the same amount of time, while one has mainly removed light local corrosion and the other has been subjected to much heavier use. Looking only at operating hours therefore does not provide a complete picture.

For several Allmet burrs, manufacturer references are therefore available based on a practical maintenance task: the number of 5 × 5 cm corrosion spots that can be treated with one burr. This makes it easier to relate service life to the amount of work completed.

The differences between these figures do not automatically mean that one burr is “better” or more durable than another. The burrs are designed for different types of work. A Rough Boy, for example, is used over a larger working area, while a Little Papa or Round Boy is intended for more targeted and precise work.

These figures are reference values, not guarantees. Actual service life can vary depending on factors such as the substrate, coating, amount of material removed, working angle, pressure and application technique.

In practice, it is therefore often more useful to look at how much usable work a burr performs during its service life rather than only at the number of operating hours. For maintenance departments, questions such as how many repairs can I complete with one burr, does the material removal rate remain at the required level, and what are the tool costs per completed repair are often more relevant than simply asking how many hours the burr will last.

Factors that determine the service life of an Allmet burr

An Allmet burr wears because its cutting edges are mechanically loaded during every operation. Tungsten carbide is wear-resistant, but it is not wear-free.

How quickly this wear develops is determined by several factors in practice.

The type of burr

A Rough Boy has a different shape and contact area from, for example, a Little Papa. One burr is designed for larger surfaces, while another is intended for precise material removal in corners and confined spaces.

As a result, the teeth are loaded differently during use.

The material being removed

Removing a coating places different demands on a burr than removing corrosion or base metal. The amount of material that needs to be removed and the material with which the cutting edges come into contact both influence wear.

The substrate

The condition and properties of the substrate also play a role. A surface with heavy corrosion or a combination of coating and corrosion places different demands on a burr than light surface preparation.

The amount of material

Heavy material removal loads a burr differently from a short spot repair. The number of operating hours alone is therefore not sufficient to compare two applications fairly.

Rotational speed

The burr and drive are designed to operate within specific parameters. Using the correct combination and the correct rotational speed is important for consistent operation.

Pressure

Applying more pressure does not automatically mean that material is removed faster. When cutting performance declines, the operator may instead be inclined to apply increasing pressure to achieve the same result.

This can be a sign that the burr is starting to wear.

Working angle

The way the burr contacts the surface also determines which parts of the cutting geometry are loaded. The correct operating technique therefore varies by burr and application.

Duration and intensity of use

A short local repair loads a burr differently from prolonged, continuous material removal.

The operator

Technique and experience also play a role. An operator who uses the correct burr, working angle and pressure can work more efficiently than someone using a tool outside its intended application.

How can you recognise a worn Allmet burr?

With a traditional abrasive disc, wear is often easy to see: the disc literally becomes smaller as the abrasive material is consumed.

With a solid tungsten-carbide burr, this is different. The overall shape of the tool can still appear almost intact while the teeth gradually lose their original sharpness. Visual inspection alone is therefore not always sufficient.

In practice, pay particular attention to:

• Reduced material removal: the same operation takes longer
• More pressure required: the operator has to push harder to achieve the same result
• Changes to the cutting edges: teeth are visibly rounded, contaminated or damaged
• Less consistent results: the desired result becomes more difficult to achieve
• Difference compared with a good burr: comparing it with a known, properly functioning burr can help identify loss of performance

The key question is therefore not only: “Does this burr look worn?” but above all: “Does this burr still cut as it should?”

The consequences of working with a worn burr

A worn burr may still look usable even though its cutting performance has already declined significantly. As the teeth become blunter, the burr removes less material and the same operation takes longer.

Operators are then often inclined to apply more pressure to achieve the same result. This makes the work more physically demanding while productivity may decline. The result can also become less consistent, making additional passes necessary.

Continuing to work with a worn burr for too long can therefore be economically disadvantageous. The purchase price of the burr is not the only factor; labour time, productivity and potential downtime also matter.

The effective service life therefore does not end only when the burr can no longer be physically used. A more practical point is when the burr no longer removes enough material for the intended application.

How to extend the service life of an Allmet burr

Service life starts with correct use. A number of practical principles help you get as much effective work as possible from a burr:

1. Choose the right burr for the application. Use a larger burr for applications requiring more material removal and a precision burr for accurate work or hard-to-reach areas.
2. Use the correct drive. Follow the product combinations specified by Allmet for the relevant burr.
3. Use the recommended application technique. Unnecessary pressure does not compensate for a worn cutting edge.
4. Monitor material removal. A decline in performance may become noticeable in the work result before it is visible on the burr itself.
5. Inspect the teeth regularly. Look for damage, contamination and changes in the cutting geometry.
6. Use the burr only for its intended application. Choosing the wrong burr can affect both the work result and service life.
7. Train operators in correct use. The right technique helps ensure the tool is used as designed.

The aim is not to keep using a burr for as long as possible at all costs. The aim is to obtain as much effective, high-quality work as possible from the burr.

Allmet burrs versus traditional grinding discs

A conventional grinding disc uses an abrasive material to grind the surface. During use, both the abrasive grains and the material in which those grains are bonded are gradually consumed.

With Allmet burrs, material is removed by formed tungsten-carbide cutting edges. The solid tool body largely remains intact while the teeth gradually become less sharp.

Wear therefore looks different from that of a traditional abrasive grinding disc.

In addition to burrs, Allmet also uses rotary discs. One example is the A-0500 Grinding Disc for Paint, intended for removing paint and steel from larger flat surfaces and pipes. A manufacturer reference of up to 32,000 corrosion spots measuring 5 × 5 cm is also stated for this disc.

It is therefore important not to refer to all Allmet tools simply as “burrs”. Product form, drive and intended application differ.

Tungsten carbide as the basis for Allmet burrs

Tungsten carbide, also known as hardmetal, is widely used in industrial cutting tools because of its combination of hardness and wear resistance.

At Allmet, this makes it possible to work with a solid tool with fixed cutting edges instead of an abrasive material that is deliberately consumed during use.

However, this does not mean that a tungsten-carbide burr does not wear.

During use, the cutting edges are continuously loaded. Over time, the teeth become less sharp and the material removal rate decreases. The main difference compared with conventional abrasives is therefore the way the tool wears, not the complete absence of wear.

Re-cutting: extending tool service life

Allmet offers a re-cutting program for selected tools. A used tool is assessed and, if it is still suitable, the cutting geometry can be restored.

This means that a suitable tool does not always have to be replaced immediately once the original cutting geometry has worn.

There is, however, an important nuance: re-cutting is not automatically possible for every Allmet burr.

Allmet’s official re-cutting information specifically applies to selected cutting discs and weld-removal discs. Suitable tungsten-carbide rotary discs may be re-cut several times, provided the product remains within the specified dimensions and technical limits.

Whether re-cutting is possible depends on factors including:

• The product type
• The remaining dimensions
• The condition of the tool
• Any damage
• Previous re-cutting cycles

For a specific burr or disc, it is therefore advisable to have it assessed by Allmet Safety Tools or an authorised distributor.

When should an Allmet burr be replaced?

A burr does not need to be replaced only when it is physically unusable.

Replacement becomes relevant when cutting performance has declined to the point where the tool no longer performs its function efficiently.

Examples include:

• A clear reduction in material removal
• Increasing pressure required
• Damaged cutting teeth
• A less consistent result
• A burr that is no longer suitable for the intended application

For Allmet burrs, it is therefore advisable to use performance as the benchmark rather than appearance or operating hours alone.

A burr that still removes material effectively does not need to be discarded simply because it has reached a certain number of operating hours. Conversely, a burr that still looks intact may already have reached the end of its effective service life.

Conclusion: look beyond operating hours

The question “How long does a burr last?” does not have a universal answer in hours at Allmet Safety Tools.

For specific products, useful manufacturer references are available. Up to 32,000 corrosion spots measuring 5 × 5 cm are stated for the A-0010 Rough Boy, 12,000 for the A-0004 Little Papa and 9,600 for the A-0005 Round Boy. These figures are reference values and may vary in practice depending on factors such as the substrate, coating and working method.

For maintenance departments, it is therefore often more useful to look not only at how long a burr runs, but at how much usable work it performs over its service life.

Would you like to know which Allmet burr is best suited to your application, or are you unsure whether a used burr still performs sufficiently

Costly delays due to unreliable equipment? Request now free technical advice!

First and last name(Required)

Email address(Required)

Hoe kunnen we je helpen?(Required)

Send

Deze website is beveiligd door reCAPTCHA en de Google Privacy Policy en Terms of Service zijn hierop van kracht.