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Band Saw Calculator

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Band Saw Calculator

This utility will help you with industry standard calculation for your band saws

 

Select desired Calculation

 

Driver Pulley Diameter:  (inch)
Driver Pulley RPM:  (rpm)
Driven Pulley Diameter:  (inch)
 
 

 

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Saw Tips

Braze Alloy

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gullet-area.jpg

Bandmill Saws - Gullet Area

ga = tp × gd × gaf

ga = gullet area (square inch)
tp = tooth pitch (inch)
gd = gullet depth
gaf = gullet area factor (.42 for square back tooth .52 for round back tooth)

 

tooth-bite.jpg

 

Bandmill Saws - Tooth Bite
tb = (fpm × 12) ÷ ((bwd × 3.1416 × rpm) ÷ tp)

tb = tooth bite (inch)
fpm = feed speed (fpm)
bwd = wheel diameter (in.)
rpm = arbor rpm
tp = tooth pitch (inch)

 

gullet-capacity.jpg

Bandmill Saws - Gullet Capacity

gc = ga ÷ sef

gc = gullet capacity (square inches)
ga = gullet area (square inches)
sef = sawdust expansion factor

Sawdust Expansion Factor:

  • 1.8 to 2.0 for slow growing species (ie. Northern Spruce)
  • 2.5 for fast growing species (ie. Southern Yellow Pine)
saw-speed.jpg

Bandmill - Saw Speed

bs = (bwd × 3.1416 × rpm) ÷ 12

bs = blade speed (feet / minute)
dwd = wheel diameter (in.)
rpm = arbor rpm

 

 

horsepower.jpg

Bandmill - Horsepower

hp = fpm x doc x kf x sg x 100 ÷ 144 ÷ ade x 100

hp = estimated power required (hp)
fpm = feed speed (fpm)
doc = depth of cut (inch)
kf = kerf (inch)
sg = Specific Gravity
144 = 12 inch/feet squared
ade = arbor drive efficiency %

Specific Gravity:

  • Spruce = .35
  • Douglas Fir = .45
  • SYP = .47
  • Oak = .60

 

gullet-fill-percentage.jpg

Bandmill Saws - Gullet Fill Percentage

gf% = (doc × tb) ÷ (ga ÷ sef) × 100

gf% = gullet fill %
doc = depth of cut
 
tb = tooth bite
ga = gullet area (sq. inches)
sef = sawdust expansion factor

Sawdust Expansion Factor

  • 1.8 to 2.0 for slow growing species (ie. Northern Spruce)
  • 2.5 for fast growing species (ie. Southern Yellow Pine)

 


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