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Information Tables

Diameter
of Saw
(inches)
8,0009,00010,00012,00014,000
12" 2,5462,8643,1833,8194,456
14" 2,1822,4552,7283,2743,819
16" 1,9092,1482,3872,8643,342
18" 1,6971,9092,1222,5462,970
20" 1,5271,7181,9102,2922,674
22" 1,3881,5621,7362,0832,430
24" 1,2731,4321,5921,9102,228
26" 1,1751,3221,4691,7632,056
28" 1,0911,2271,3641,6371,910
30" 1,0181,1461,2731,5281,782
32" 9541,0741,1931,4321,671
34" 8981,0111,1231,3481,572
36" 8489541,0611,2731,485
38" 8049041,0051,2061,407
40" 7638599151,1461,337
42" 7288189101,0911,273
44" 6947818681,0411,215
46" 6647478309961,162
48" 6367167969551,114
50" 6116877649161,069
52" 5876617348811,028
54" 566637707849990
56" 546614682818955
58" 526593658790922
60" 509573636764891
62" 493554616740862
64" 477537597716836
66" 462521579694810
68" 449505562674786
70" 436491546655764
72" 424477530636742
74" 413464516619722
76" 402452502603704
78" 392440490587685
80" 382429477573668
82" 373419465559652
84" 364409455546636
96" 318358398477557
108" 283318354424495
GaugeThousandths Fraction
40.23815/64"
50.2207/32"
60.20313/64"
70.1803/16" scant
80.1655/32" full
90.1485/32" scant
100.1341/8" full
110.1201/8" scant
120.1097/64"
130.0953/32"
140.0835/64" full
150.0725/64" scant
160.0651/16" full
170.0581/16" scant
180.0493/64"
190.042-
200.035-
Fraction Decimal Gauge
1 1.0000
31/32 0.9687
15/16 0.9375
29/32 0.9062
7/8 0.8750
27/32 0.8437
13/16 0.8125
25/32 0.7812
3/4" 0.7500
23/32 0.7187
11/16 0.6875
21/32 0.6562
5/8 0.6250
19/32 0.5937
9/16 0.5625
17/32 0.5312
1/2" 0.5000
15/32 0.4687
7/16 0.4375
13/32 0.4062
0.3800 00
3/8 0.3750
11/32 0.3437
0.3400 0
5/16 0.3125
0.3000 1
0.2840 2
9/32 0.2812
0.2590 3
1/4" 0.2500
0.2380 4
0.2000 5
7/32 0.2187
0.2030 6
3/16 0.1875
0.1800 7
0.1650 8
5/32 0.1562
0.1480 9
0.1340 10
1/8 0.1250
0.1200 11
0.1090 12
0.0950 13
3/32 0.0937
0.0830 14
0.0720 15
0.0650 16
1/16 0.0625
0.0580 17
0.0490 18
0.0420 19
0.0350 20
0.0320 21
1/32 0.0312
0.0280 22
Rim Speed (feet/minute) =RPM x Saw Diameter inches ÷ 3.8197
Chip Load per Tooth (Inches) =Feed Rate (FPM) x 12 ÷ RPM x Teeth
Number of Teeth =Feed Rate RPM x 12 ÷ Chip Load x RPM
Feed Rate =(Feed Roll Diameter x 11 (3.1417)
  x Feed Roll RPM) ÷ (Chip Load x RPM)
Circumference =3.1417 x Diameter
Diameter =Circumference ÷ 3.1417
Required Gullet Capacity =(Tooth Bite x Depth of Cut) x 2.5
Driven Pulley RPM =(Driver Pulley 0 x RPM-Driver) ÷ Driven Pulley 0
Driver Pulley RPM =(Driven Pulley 0 x Driven Pulley RPM)
  ÷ Driver Pulley 0
Horsepower per Saw =(Depth of Cut x Kerf x FPM x Factor) ÷ 144
Factor:A = 35 (soft wood)
B = 40 (southern pine)
C = 45 (hardwood)
Tooth Bite Parameters =Gang Edger Saws (Carbide ): .030–.045
  Board Edger Saws (Carbide): .030–.050
More Useful Formulas
π / Pii / Pie / Pye / Peye =3.142
Speed (Surface Feet / Minute) =Revolutions Per Minute x Tooth Load (Inches)
  x Number of Teeth
Tooth Load (Inches) =Feed Rate (Inches ÷ Revolutions Per
  Minute) x Tooth Load (Inches)
Number of Teeth =Feed Rate (Inches / Minute / Revolutions Per
  Minute) x Tooth Load (Inches)
1 Inch =25.4 Millimeters
1 Kilometer =0.621 Mile
1 Mile =1.60 Kilometers
1 Kilogram=2.204 Pounds
1 Ounce =28.3 Grams
1 Gallon =0.1604 Cubic Feet
Normal Atmospheric Pressure =14.7 Pounds ÷ Square Inch or 1013 Millibars
1 Knot =6,080 Feet / Hour
Quick Fix Calculation for
Revolutions Per Minute
=4 x Feet / Minute ÷ Diameter
Area of a Circle =3.142 x (Radius x Radius)
Volume Of a Cylinder =Area of Circle x Length of Cylinder
Volume Of a Rectangle =Length x Width x Thickness
  • FPM
    Inches
    Common Factors:PINE=2.25
    FIR=2.5 (standard)
    HARDWOODS=2.75 - 3.00

    Toothbite Formula
    (Feed Speed * 12) ÷ (RPM * # of Teeth)

    Gullet Capacity Formula
    Maximum Depth * Toothbite * Factor

  • Inches
    Feet
    Common Factors:PINE=2.25
    FIR=2.5 (standard)
    HARDWOODS=2.75 - 3.00

    Chipload Formula (Inches)
    (Feed Rate * 12) ÷ (RPM * # of Teeth)

    Horse Power Per Saw Formula
    (Depth of Cut * Kerf * Feed Rate * Factor) ÷ 144

    Gullet Capacity Needed Formula
    Chipload * Depth of Cut * 2.5

    Tooth Pitch Formula
    Circumference ÷ # of Teeth