Catalog FORMAT plus 2017 - 2018 | Contact : 0799.402.346 | 0799.402.343 | e-mail : format@rocast.ro

Knurling Tools 381

Prețurile sunt orientative. Solicitați oferta și veți obține prețuri mult mai avantajoase.

Tooth pitch describes the number of teeth per inch (TpI). 1 inch is equivalent to 25.4 mm. TOOTH PITCH

Cutting Tools 2

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

Working length

Tooth pitch

(mm)

TPI

from

to

10 –14 08 –12 06 –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

Correct breaking in guarantees longevity, see illustration above: 1. New cutting edge with very small edge radius 2. Optimally rounded cutting edge due to correct breaking in of saw band 3. Excessive load due to inappropriate breaking in leads to micro-chipping at the cutting edge. BREAKING IN OF SAW BLADES

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

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. It is very important to avoid vibrations. In this case, a change of cutting speed should help. After the breaking in time of approx. 15 min or 300 cm 2 , you should slowly increase first the cutting speed and then the feed rate to the previously determined data. 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 refractometers can be found on page Ç 9/107 and belt tension measuring devices are available upon enquiry.

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

In order to maintain optimum service life, we recommend to break in the blade accordingly. Depending on the material and dimensions of the cutting object, determine the correct cutting and advancing speed (e.g. with the WIKUS bimetal cutting data slide rule). It is important that the new saw blade is only used with approx. 50% of the feed rate determined. Micro-chipping due to excessive chip thickness is thus avoided. New saw blades can tend to vibrate and generate vibration sounds. Here, it is helpful to slightly reduce the cutting speed. Where small workpiece dimensions are involved, approx. 300 cm 2 of the material should be cut to break in the blade. If large workpiece dimensions have to be processed, we recommend to break in the blade for approx. 15 minutes. After the breaking in period, you can slowly increase the advance to the previously determined speed rate.

2/127

Articles marked ◊ are not held in stock, procurement is effected at short notice.