Catalog FORMAT plus - EDE 2015 - 2017

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Band saw blades

TOOTH PITCH

Tooth pitch is the term used to describe the number of teeth per inch (TPI). 1 inch is equivalent to 25.4 mm.

2 Cutting Tools

The decisive factor for the tooth pitch is the working length of the band saw blade in the workpiece. The table shows the respective upper and lower limits.

Variable Tooth distribution ZpZ

working length (mm)

to

from

10 –14 8 –12 6 –10 5 – 8 4 – 6 3 – 4 2 – 3 1.4 – 2 1.0 – 1.4 0.85– 1.15 0.75– 1.25 0.7 – 1.0

–

20 30 50 60 90

10 20 30 50 80

Structure of a bimetal band saw blade

150 300 600 1000 2000 2000 3000

120 250 400 600 600 1000

HSS flat wire

Electron or laser beam welding procedure

Bi-metal saw band

Carrier band made from alloyed heat-treatable stell

BREAKING IN YOUR BAND SAW BLADES

When blades are broken in properly, a long service life is guaranteed, see illustrations above: 1. New cutting edge with very small edge radius 2. Ideal rounding of the cutting edge through proper breaking in of the band saw blade 3. Excessive strain due to improper breaking in leads to micro-breakages of the cutting edge

Carbide saw blades After selection of the optimum parameters for the application case on hand (e.g. using the WIKUS carbide cutting data slide rule) you should break in the carbide saw blade at about 75% of the cutting speed and 50% of the feed rate. The avoidance of oscillation and vibration is very important. If this does occur, changing the cutting speed should help. After the breaking in time of approx. 15 min or 300 cm 2 y ou should slowly increase first the cutting speed and then the feed rate to the data that you determined before. Before you use the blade for the first time check both the blade tension, which should be about 300 N/mm 2, and the oil content of the cooling lubricant. Hand-held refractrometers can be found on Ç 9/95 and belt tensioning measuring devices are available on request.

Bimetal saw blades Sharp cutting edges with extremely small edge radii are the

prerequisite for high cutting capacity. WIKUS blades are predestined for this.

To achieve optimum service life we recommend breaking the blade in properly. Determine the right cutting speed and feed rate (e.g. using the WIKUS bimetal cutting data slide rule) based on the material to be cut and its dimensions.It is important that the new saw blade is only used with approx. 50% of the feed rate determined. This avoids micro-splintering which would otherwise occur due to large chip thicknesses. New saw blades can tend to vibrate and make oscillating noises. In this case, a slight reduction in cutting speed will help here, too. Where small workpiece dimensions are involved, approx. 300 cm 2 of the material should be cut to break in the blade. If large work- piece dimensions are to be machined, we recommend breaking the blade in over a period of approx. 15 min. After breaking in you can slowly increase the feed rate to the value for feed that you determined before.

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