How to choose the right blade
Shape (geometry) of teeth
Choosing the right tooth geometry is always the foundation of your success. It is essential to thoroughly assess the composition of the material to be cut and decide how you intend to work with the tool. The more versatile the solution you seek, the shorter the life of the bandsaw blade.
Standard S
- small cross-section materials
- tool and cast steel
- materials with higher carbon content
Profile P
- profile material shapes O, L, I, T, H, U
- cutting in bundles and layers
- where vibrations occur during cutting
Positive K
- full materials of larger sizes
- thick-walled tubes
- stainless and acid-resistant steels
- non-metallic materials
Extremely positive K+
- durable materials of large dimensions forming a long chip
- higher cutting performance
- exotic alloys
Grinded T
- highly durable materials
- productive cutting
- perfect surface quality of the cut material
Cutting edge
The cutting edge materials listed below differ mainly in increasing hardness, wear resistance and higher thermal load. The decisive factors for the correct selection is the machinability of the material to be cut and the machine design.
| Material | Hardness | Usability |
|---|---|---|
| Tool steel | ca. 850 HV | ca. 200 °C |
| HSS (bimetal) | ca. 940–1000 HV | ca. 600 °C |
| Carbide | ca. 1600–3800 HV | ca. 800 °C |
| Diamond | ca. 9000 HV |
Tooth pitch options
You can choose between constant and variable tooth pitch as standard, with variable pitch being more versatile. The practical table 4) Tooth pitch selection will help you choose the right solution.
Constant tooth pitch
Variable tooth pitch
Tooth pitch selection
Recommendation for full materials
| Diameter (mm) | Number of teeth per inch (tpi) |
|---|---|
| from 550 | 0,75-1,25 |
| 380-750 | 1-1,3 |
| 250-550 | 1,4-2 |
| 120-350 | 2-3 |
| 40-80 | 3-4 |
| Diameter (mm) | Number of teeth per inch (tpi) |
|---|---|
| 60-110 | 4-6 |
| 40-70 | 5-8 |
| 30-60 | 6-10 |
| 20-40 | 8-12 |
| to 25 | 10-14 |
The decisive factor for choosing the right tooth pitch is the length of the uninterrupted part of the cut. In the case of solid materials it is the diameter of the material, in the case of bundle cutting it is their sum. In order to achieve lower vibrations during cutting, we recommend choosing a variable tooth pitch.
Recommendation for profiles and tubes
- Thin-walled profiles
- Thick-walled profiles
| Wall thickness (mm) | Outer profile diameter (mm) | ||||||
|---|---|---|---|---|---|---|---|
| 20 | 40 | 60 | 80 | 100 | 120 | 150 | |
| 2 | 14 | 14 | 14 | 14 | 14 | 14 | 10-14 |
| 3 | 14 | 14 | 14 | 14 | 10-14 | 10-14 | 8-11 |
| 4 | 14 | 14 | 10-14 | 10-14 | 8-11 | 8-11 | 6-10 |
| 5 | 14 | 10-14 | 10-14 | 8-11 | 8-11 | 6-10 | 6-10 |
| 6 | 14 | 10-14 | 8-11 | 8-11 | 6-10 | 6-10 | 5-7 |
| 8 | 10-14 | 8-11 | 6-10 | 6-10 | 5-7 | 5-7 | 5-7 |
| 10 | – | 6-10 | 6-10 | 5-7 | 5-7 | 5-7 | – |
| Wall thickness (mm) | Outer profile diameter (mm) | |||||||
|---|---|---|---|---|---|---|---|---|
| 80 | 100 | 120 | 150 | 200 | 300 | 500 | 750 | |
| 10 | - | - | - | 4-6 | 4-6 | 4-6 | 3-4 | 3-4 |
| 15 | 4-6 | 4-6 | 4-6 | 4-6 | 4-6 | 3-4 | 2-3 | 2-3 |
| 20 | 4-6 | 4-6 | 4-6 | 4-6 | 3-4 | 3-4 | 2-3 | 2-3 |
| 30 | 4-6 | 4-6 | 4-6 | 3-4 | 3-4 | 2-3 | 2-3 | 2-3 |
| 50 | - | - | 3-4 | 3-4 | 2-3 | 2-3 | 2-3 | 1,4-2 |
| 80 | - | - | - | - | 2-3 | 2-3 | 1,4-2 | 1,4-2 |
| 100 | – | – | – | – | – | 2-3 | 1,4-2 | 1,4-2 |
When cutting profiles and tubes, the choice of the correct tooth pitch is particularly important. The required pitch depends on the material diameter and wall thickness. If you are cutting two or more profiles side by side, double the wall thickness must be taken into account.
Blade width
For horizontal machines, the width of the bandsaw blade is determined and is invariable. Vertical band saws allow the use of different blade widths to a certain extent. Naturally, the strength and stability of the bandsaw blades increases with increasing width. For curved cuts, the smallest cutting radius is the determining factor for choosing the width of the blade.
Width of bandsaw blade in mm
6
8
10
13
16
20
Minimum cutting radius in mm
- 16
- 30
- 40
- 65
- 95
- 140
Blade length
Each machine has a specific bandsaw blade length, which is specified in the machine's technical documentation. If you do not know how to choose the right blade, our technicians will be happy to help you. Please contact our team with confidence.
According to machinability
- General use
| Aluminium, non-ferrous metals | Standarduniversal use | Positivesolid materials | ||
| Carbon steels | Profilelong lifetime* | |||
| Structural steels | ||||
| Alloy steels | Positivesolid materials | |||
| Bearing steels | ||||
| Mold steels | M51 Positivedurable blade | |||
| Tool steels | ||||
| Stainless steels | ||||
| Titanium alloys | ||||
| Nickel-based alloys |
- Easy machinability
- Difficult machinability
- * structures / bundles