Southbend SB1020 ユーザーズマニュアル

-24-

For Machines Mfg. Since 8/09

Model SB1020

blade selection

Proper blade tension is essential to avoid blade 

vibration, twist, or`slippage on the wheels. A 

correctly tensioned blade provides long life, 

straight cuts, and efficient cutting times.

The three major signs of incorrect blade tension 

are: 1) The blade stalls in the cut and slips on the 

wheels, 2) the blade frequently breaks, and 3) the 

bandsaw does not make straight cuts.

1.  Make sure the blade is tracking properly.

2.   DISCONNECT BANDSAW FROM POWER!

3.  Loosen and slide the blade guide as far out 

as it will go, then tighten it down again.

4.  Turn the tension knob in Figure 23 

clockwise to tighten the blade or clockwise to 

loosen the blade.

5.  Tighten the blade until the tension gauge 

moves into the green section.

Many conditions may cause a bandsaw blade to 

break. Some of these conditions are unavoidable 

and are the natural result of the stresses placed 

on the bandsaw; other causes of blade breakage 

are avoidable. 

•  Faulty alignment or adjustment of the blade 

guides.

•  Forcing or twisting a wide blade around a 

tight radius.

•  Feeding the workpiece too fast.

•  Dull or damaged teeth.

•  Over-tensioned blade.

•  Top blade guide assembly set too high above 

the workpiece. Adjust the top blade guide 

assembly so that there is approximately 

1

⁄

8

"–

1

⁄

4

" between the bottom of the assembly 

and the workpiece. Understand that with 

smaller workpieces, this may not be possible. 

In these cases, simply adjust the blade guide 

as far down as possible.

•  Using a blade with a lumpy or improperly 

finished braze or weld.

•  Continuously running the bandsaw when not 

in use.

•  Leaving the blade tensioned when not in use.

•  Using the wrong blade pitch (TPI) for the 

workpiece thickness. The general rule of 

thumb is to have no fewer than three teeth 

in contact with the workpiece when starting 

a cut and at all times during cutting.