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Choose the right saw band for your project

What is a bimetallic bandsaw blade?

Bimetallic bandsaw blades combine the high flexibility of the base band, made of specially alloyed heat-treated steel, with the enormous resistance of the tooth tips made of hardened high-speed steel (HSS) in grades M42 and M51.

High performance carbide tipped bandsaw blades from ARNTZ feature welded carbide balls that are machined into carbide teeth with different tooth geometries in the production process, resulting in low-vibration cuts and smooth material surfaces with high cutting performance.

The setting of the tooth ensures that the saw band is cut freely, preventing the band from getting caught in the cutting material.

The dimensions of the bandsaw blade are determined by the model of the bandsaw and are given in millimetres (or inches). Please obtain this information from the machine manufacturer's specifications. ARNTZ bandsaw blades can be individually made to measure for you or supplied as rolls.

It is always recommended that bandsaw blades are retracted when they are used for the first time to prevent premature breakage of the tooth edge. This significantly changes the lifetime and cutting quality of the bandsaw blade.

Choose the optimal tooth pitch for your workpiece

How to choose the right number of teeth per inch (tpi) for your bandsaw blade

Choosing the right tooth pitch is crucial for accurate and efficient cuts. The tooth pitch is determined and influenced by the number of teeth per inch (tpi). A higher number of teeth means a fine tooth pitch, while a lower number of teeth results in a coarser tooth pitch.

Division of teeth

1.
Definition
The correct tooth pitch is crucial for accurate and efficient cutting results. It is defined by the number of teeth per inch (tpi) and has a direct effect on cutting quality. A higher tooth pitch results in a finer cut, while a lower tooth pitch produces a coarser cut.

2.
Basic rules for correct tooth selection
Larger workpieces require a coarser tooth pitch (e.g. 4/6, 3/4 or 2/3 tooth pitch).
Smaller workpieces should be processed with a finer tooth pitch (e.g. 10/14, 8/11 or 8/12 tooth pitch).
Medium-sized workpieces can be processed with a medium-sized tooth pitch (e.g. 5/7, 5/8 or 6/10 tooth pitch).
For hard materials, a finer tooth pitch should be selected, whereby the chip removal is distributed over several teeth.
For soft materials, a coarser tooth pitch should be chosen, as the larger chip space provides more capacity for the long sawdust.

The choice of the right cutting speed and feed rate of the saw blade depends largely on the strength of the material, the shape and cross-section of the workpiece. Precise adjustment of these parameters ensures efficient processing and optimal cutting results.

Cutting speed

1.
Definition
Efficient machining and optimum cutting results require careful co-ordination of the saw blade cutting speed and the saw blade feed speed, where the strength of the material, the shape of the workpiece and the cross-section play a central role. The cutting speed is the speed at which the saw blade moves. It is expressed in metres per minute (m/min) or feet per minute (ft/min).

2.
Basic rules for optimal setting
The higher the material strength, the lower the cutting speed.
The smaller the workpiece cross-section, the higher the cutting speed.
Pipes and profiles are cut at a lower cutting pressure than solid material.
The finer the serration, the smaller the chip chamber.
The feed rate must be adapted to the tooth pitch to avoid overfilling the chip chambers.

Proper break-in is important for a long service life and to reduce tool and set-up costs. At the beginning of cutting, the particularly sharp tooth tips should not be fully loaded immediately, as overloading can lead to damage or chipping of the bandsaw blade at an early stage. Proper break-in ensures that the cutting edges are perfectly rounded, which significantly improves tool performance and durability.

1
Definition

Like all cutting tools, ARNTZ bandsaw blades need to be properly set up. This ensures maximum service life and saves tool and set-up costs. The particularly sharp tooth tips should not be fully loaded at the start of cutting. Premature overloading can lead to chipping of the tooth tips. Correct running-in ensures optimal rounding of the cutting edges.

2.
Our recommendation for bimetallic bandsaw blades

The starting feed should be half of the final feed at the recommended cutting speed for the first 300 - 500 cm2 of cutting area. Thereafter, the feed should be gradually increased to the maximum cutting speed. If vibrations or noise occur at the beginning of cutting, the cutting speed should be adjusted slightly.

The right break-in procedure - the guarantee of a long blade

The correct saw blade tension is an important factor for accurate cuts. Too low tension can lead to skewed or incorrect results

For bandsaw blades with a width of up to 27 mm, we recommend a minimum tensile stress of 200 N/mm² (29,000 PSI).

For bandsaw blades with a width between 34 and 80 mm, the tensile stress should be at least 250 N/mm² (36,000 PSI).

Optimise your cutting results with the right saw blade tension.

Cooling lubricants prevent overheating of the saw teeth and the workpiece. This can increase the life of the bandsaw blade. It also helps to transport the chips from the cutting surface to the collection container.

It is common practice on the market to saw with a cooling lubricant emulsion. Depending on the material to be sawn, the mixing ratio is from 1:5, 1:10 up to 1:30.

Regular maintenance and special checks will keep your saw in perfect condition. We recommend a regular check of the saw machine. For example, the chip cleaning brushes, saw blade guide and cooling lubrication should be checked daily for proper operation.

Regular review is also important for:

  1. the concentration of the cooling lubricant
  2. tension of the bandsaw blade
  3. bandsaw machine wheels at stake
  4. hydraulic system (if available)