Bahco Saw manual Teeth Per Inch TPI, Bandsawing facts, General Information

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Teeth Per Inch (TPI)

The number of teeth per inch (TPI) defines the pitch of the blade and can vary from less than 1 to 24.

Thin-walled workpieces like tubes, pipes, sheet etc., require fine teeth, otherwise there is a risk of tooth damage or breakage.

Large cross sections should be cut with a coarse-pitched saw, i.e. fewer teeth per inch. The fewer teeth engaged in the workpiece the higher the cutting capacity. This is because the penetration capacity of each individual tooth is greater if the saw’s feed pressure is distributed over a fewer number of teeth. A coarse pitch (few TPI) therefore increases productivity and provides a desirable, large chip space.

Soft materials, such as aluminium and bronze, require a large chip space. A coarse pitch prevents the chips from building up and packing together in the gullets, which can impair sawing and damage the blade.

Use the TPI selection guides to find the right pitch for your application.

Bandsawing facts

Machine

Check frequently:

•The operation of the chip brush.

•The wear and alignment of the guides.

•The band tension with a tensionmeter (see page 29).

•The band speed with a tachometer (see page 29).

•The coolant concentration with a refractometer (see page 29).

Coolant / Cutting fluid

The coolant lubricates, cools and carries the chips from the cut. It is important to:

•Use good cutting fluid.

•Use recommended concentration of cutting fluid.

•Make sure that the cutting fluid reaches the cut with low pressure and large flow.

Workpiece

•Make sure that the workpiece is firmly clamped so that it cannot vibrate or rotate.

•Do not use bent or damaged workpieces.

Running in

To obtain the maximum blade life always use the recommended band speed but lower the feed rate to 1/3- 1/2 during the first 10 minutes of cutting.

During the next 10 minutes increase the feed rate in stages, until you have reached the recommended feed rate.

General Information

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Contents Global Precision Introduction Setting Tooth formingHeat treatment Service Storage and DistributionWeld Centres Customer Support Service Services/ResearchResearch and Development DevelopmentBandsaw Selection Guide Metal CuttingNon-Ferrous Cutting Bandsaw Selection Guide Band Length Types of Set General InformationBand Width Raker setTeeth Per Inch TPI Bandsawing factsGeneral Information Feed Rate/Chips Tooth pitch for solid workpieces Cutting pipes and profiles Tooth Shape guide Tooth Shape GuideNon-ferrous Cutting Evenly pitched Production Cutting Sandflex CobraFor high productivity cutting of large workpieces Sandflex Cobra PSG Production CuttingFor high productivity cutting of difficult-to-cut materials Sandflex King Cobra PHGProduction Cutting Carbide Triple Set Xtra Other Production/Special Purpose Cutting Other Production/Special Purpose Cutting Sandflex Die-BandFor contour sawing of tool and mould steels For bundle cutting of tubes and structural steel Sandflex FabricatorMulti-purpose Cutting Multi-purposeSandflex Dragon For easy-to-cut steelsFor portable hand held machines Sandflex Portable Bandsaw Blades10/14 14/18For light machines with limited feed force Sandflex CompensatorSandflex Multi-cut For horizontal machines Non-ferrous CuttingFor vertical machines and contour cutting Economical Bi-Metal blade for non-ferrous cutting Carbide Triple Set Carbide Grit Carbide GritMulti-Grit BandCalc Sawing AidsTensionmeter Sawing AidsRefractometer TachometerImportant Facts Troubleshooting GuideTroubleshooting Guide Loop packaging/Bimetal and Carbide 3866, 3868 Packaging InformationCoil packaging 3000 3001 3661 4121 5335 910 137 175Order Form/Enquiry Form Order Form/Enquiry FormBahco Tools
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