Technical Information for Band Saw Blades

For optimum cutting performance of Bi-Metal band saw blade it is essential to choose the right toothing for individual application. Choose either Standard tooth form with constant tooth pitch or Variable tooth form with unevenly spaced teeth. Combined toothing is recommended for cutting of problematic material with vibration reduction.

Recommended Toothing for Cutting Solid Material

Constant tooth pitch

Cross section Teeth per inch
mm tpi Tooth shape
380-800 1,25 H
200-400 2 H
120-200 3 H
80-120 4 H/N
50-80 6 N
30-50 8 N
20-30 10 N
10-20 14 N
to 10 18 N
N = Standard tooth shape
H = Hook tooth shape

Variable tooth pitch

Cross section Teeth per inch
mm tpi Tooth shape
of 550 0,75/1,25 V-POS
300-600 1/2 V-POS
120-350 2/3 V-POS
80-140 3/4 V-POS
60-110 4/6 V-POS
40-70 5/8 V-0
30-60 6/10 V-0
20-40 8/12 V-0
to 25 10/14 v-0
V-POS = variable tooth shape with positive hook angle
V-0 = variable tooth shape with 0° hook angle

Recommendation to Cut Steel Tubes and Structurals

While cutting steel tubes and profile the choice of the correct toothing plays an decisive role. Variable toothing has been proven to be the most appropriate toothing type.

Important factors are the wall thickness or outer parameters of the tubes or structurals.

Instructions for Right Usage

  1. It is necessary to pay the same attention to band saw blades as to other tools. Please check especially:
    • cracks
    • band saw back jamming
    • twisting and dulling of band saw
  2. Keep the band saw in good technical condition. Please check especially:
    • if the fixing clamp and straightening mechanism are functional
    • if the hydraulic pressure, cooling fluid are sufficient and circular wheel are parallel. If not so, it is absolutely needed to change or set up the mechanism.
  3. Put the band saw on clean, chip- free circular wheels. Insert band saw between circular wheels, straighten band saw properly and adjust rotating brush for chip removal from tooth spaces.
  4. Tighten cutting material in the clamp so that as many teeth as possible are cutting (min. 4, maximum 30).
  5. While bundle cutting, each piece must be well fixed.
  6. Find out the material hardness before you start cutting- cut out hard spot, scale or flame burn off.
  7. Before casting cutting remove sand from the surface with bastard file or steel brush. Sand can make band saw go dull very fast.
  8. Before starting to cut it is necessary to keep minimal clearance between top tooth line and cutting material- 10mm and set up minimal feed pressure of saw arm.
  9. Increase feed pressure of saw arm after starting the machine gradually. Do not use neither high pressure not low pressure.
  10. While cutting make sure the cooling fluid flow into cutting spot is continuos.
  11. Straighten the band saw after cutting 2 or 3 pieces.
  12. Check the single cutting time after a certain time period. If this time is in disproportion, replace the band saw with new one.
  13. Never start cutting with new band saw in old cut line. It is necessary to turn the material and start cutting again.
 
 


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