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Technical Support Information Tables

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Technical Support

Information Tables

  • Rim Speed—Feet per Minute
    • 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
  • Saw Gauge Equivalent Chart
    • 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-
  • Decimal Equivalents
    • 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
  • Useful Formulas
    • 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
  • Formula for Gullet Capacity/Toothbite
    • 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

  • Feeds/Speeds
    • 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