Band Saw Blade Selection

We supply bandsaw blades for many standard sized machines and blades made up to order using blade stock made by L.S. Starrett in either Scotland or the USA. Blade widths and TPI (Teeth Per Inch) available are indicated below.

 

In choosing a blade you might consider the following.

  • It is good practice to have at least three teeth in the cut at any one time (it follows that thinner stock needs a higher teeth count).
  • Tooth gullet capacity (the gullet is the gap between the teeth which carries the shaving which, when full, slows feed rate), the power of your machine and blade speed (and of course sharpness) largely determine the possible feed rate - the speed work can be cut.
  • Higher tooth counts cut slower because the gullets have a lesser carrying capacity.
  • Faster feed rates equals rougher cuts, slower feed rates equals a finer cut.
  • It follows then that halving the feed rate more or less doubles the effective tooth count.
  • For a given feed rate, more teeth per inch equals a finer but slower cut and fewer teeth equals faster but coarser cuts.
  • Generally (but not always) work faces cut on the bandsaw are re-worked after the cut so instances where an off-saw cut is appropriate to an end use are the exception.
  • If you accept this then trueness and speed of cut may ultimately be more important than smoothness.
  • Greater blade width means less ability to take corners and narrower blades are good at cornering.
  • Wide blades rip more accurately and are better at straight cutting.
  • Higher blade tension and attention to blade guides reduce blade wandering.
  • Higher blade tension is less likely to cause blade breakage in wider blades which have a wider and stronger weld.
  • Blades which predictably cut askew are likely to have unequal set.
  • Blades which randomly cut askew are usually blunt or poorly guided or poorly tensioned or overfed or of low quality.
  • Blades should probably best track on or just backwards of centre of the wheels.
  • Blades which pull off the wheels when work is pulled out of a cut are usually tracking too close to the front of the wheels or are running under less than optimum tension.
  • Using standard blade stock thickness on small diameter wheels can cause fatigue cracks in the blade and/or premature weld failure.
  • Mass produced pre-packaged blades are generally of poorer quality than the made-to-order blades we supply.
  • Never run bandsaws with the wheel guards removed. When a blade breaks it is as startling as a gun shot at close range and remember the powered lower wheel keeps turning and can cause serious injury if the blade remains are not contained.

 

ORDERING

We need to know the length of blade you require.  To ascertain this, wind down the top wheel about 2/3 rds of its travel - i.e not right to the bottom limit but close to it - and either stretch a tape measure or a length of twine around both wheels and measure the length. Hint: Note this measurement in felt tip pen inside the top wheel housing cover.

Then using the available blade widths and TPI's in the table below select your blade and email us for a quote    This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Table 1 - Lists options for smaller diameter three wheel machines which require thinner blade stock.

Table 2 - Lists options for all general purpose two wheel machines with wheels over about 280-300mm.

Table 3 - Lists bi-metal blades for cutting metals - the 14 tpi and coarser 3 tpi are indicated for highly abrasive or gritty woods such as recycled railway sleepers.

 

TABLE 1     TPI----->

Untitled Document
    2 3 4 6 8
10
14 18 24
32
6mm 1/4"     6
  10
14      
10mm 3/8"   3
4
6
8
10
14 18
 
12mm 1/2"     4
6
  10 14      

 

TABLE 2     TPI----->

Untitled Document
    2 3 4 6 8
10
14 18 24
32
3mm 1/8" 14*
5mm 3/16"   10
6mm 1/4" 3
4
6
8
10
14 18 24  
10mm 3/8"   3
4
6
8
10
14 18
24 32
12mm 1/2"   3
4
6
8
10 14 18
24 32
16mm 5/8"   3
4 10 14
19mm 3/4"   3
4   8 10 14
25mm 1" 2 3 4 6 14

 

* Sorry we cannot warrant this blade against breakage due to its small width.

 

TABLE 3     TPI----->

Untitled Document
    2 3 4 6 8
10
14 18 24
32
10mm 3/8"     4
      14    
12mm 1/2"     4
      14