Adjusting Blade Tension on the FEMI 780/783 Bandsaw

[Micke S]

It is important to apply good band tension to a bandsaw to make it cut nice and not to get premature blade wear. I did the following to get a reproducible method.

• Checked how much the blade stretched when I turned the adjuster to more than a reasonable tension. This gave a blade stretch of just over a thou, 0.03 mm
• Reduced the blade tension to what I felt is quite hard but not too hard. This resulted in a stretch of 0.8 thou, 0.02 mm
• Replaced the adjuster knob with a M8 nut and a large and thick washer
• Checked what torque that gives 0.8 thou. This was 15 Nm, which will the torque to use each time the blade is stretched

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[Ulma Doctor]

:thumbsup:
bra tänkande,
bladspänning är mycket viktigt för rak sågning och blad livslängd.
Jag är säker på andra kommer att följa din bly.
tack.

mike)

 

[Micke S]

Thick wall steel tube cutting. A 10 lbs weight is attached to the handle to get a strong and defined pressure.

 

[Ulma Doctor]

the saw cut through the tube like it was butter!!!
great work!!!