Sawing The universal saw blade: A myth that costs more than it benefits

In the metal and steel construction industry, there is a widespread belief that a so-called universal saw blade can meet all the requirements for cutting different steels. The assumption is based on the desire for a convenient solution. But does the universal saw blade really exist?

The everyday work of a metal or steel fabricator requires a lot of flexibility: Small and large batch sizes, varying cross-sections, different shapes and dimensions of the workpieces, as well as different steel types are standard. Businesses are under great time and cost pressure. Especially in one of the first steps in the production process, sawing, an efficient process is important. The desire for an all-purpose saw blade is therefore very understandable. However, despite this desire, reality proves otherwise: It debunks the myth of the universal saw blade and shows that using the appropriate saw blades for each sawing task is significantly more efficient and cost-effective.

Meba, a manufacturer of metal band saw machines, offers a wide product portfolio of straight-cut, miter, and double-miter band saws in every level of automation. As a manufacturer of band saws, Meba also has high expertise in the field of saw blades. The company has established a highly specialized saw blade expert who conducts extensive consultations and individual test runs to determine which blade is right for which sawing task. Recently, the specialist conducted elaborate tests to show that a universal saw blade cannot compete with specific blades in terms of cutting quality, speed, and especially cost.

Complex tests and their results

In a specific example, a customer visiting Meba inquired about an all-purpose band that could be used for all his sawing tasks. The Meba expert conducted cutting tests with various saw blades and tooth patterns in the sawmill. During these test cuts, the customer could observe live how the so-called universal saw blade broke after only 15 cuts, whereas the expected service life with proper use would be a few thousand cuts. Accordingly, the expert selected saw blades individually tailored to the customer's sawing tasks and conducted further test runs with these blades. It was investigated how the use of a universal saw blade compared to the targeted change of specialized saw blades affects efficiency and costs. A total of 120 cuts per day with different profiles and material cross-sections were performed. The variety of workpieces highlighted the challenges faced by the saw blades.

The tests were carried out on the Meba eco 335 metal band saw. The machines of this series are as individual as the customer-specific requirements. They are equipped with the patented double miter system as well as with smart technical features, and if necessary, can be networked and fully automated.

Results are astonishing

The tests were conducted according to two different strategies. In the first strategy, a universal saw blade was used. In the second, specialized strategy, the saw blade was changed depending on the workpiece dimensions. The best saw blade for each workpiece was used in this approach. The results were astounding: They showed that optimal saw blade selection leads to significantly improved cutting performance, reduced saw blade stress, and longer tool life. Specifically, machine time was reduced by 18 percent, and tool costs were reduced by more than 50 percent through the use of specialized saw blades.

These figures clearly demonstrate that cost optimization through the selection of the right saw blade is significant and should definitely be implemented in metalworking.

The saw tests with solid material demonstrated even more clearly how the use of specialized saw blades impacts efficiency. In addition to the usual workpieces, 5 cuts of solid material were simulated according to the described strategies. By changing the saw blade types according to workpiece dimensions, cutting performance increased by 35 percent, and saw blade consumption was reduced by 58 percent. If this result doesn't speak for itself.

Conclusion: The myth of the universal saw blade persists, but practice shows that the optimal choice of saw blade significantly enhances both cutting performance and the efficiency of a band saw. By using the correct saw blades targeted for metal band saws, not only can machine times be reduced, but tool costs can also be significantly lowered. Recognizing the differences in saw blades and consequently choosing the right blade are critical factors for operating costs in metal processing. It is once again confirmed: The idea of a universal saw blade may sound tempting, but in reality, tailored solutions are the key to an efficient and cost-effective production process.