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Drill and Tap Chart

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					                                                    Tapping


Drill and Tap Chart
             Screw Size                                         Tap Drills                                   Clearance Hole Dri
                                                                               Stainless Steel,                          All Materials
                                        Alum, Brass, Plastics       75%
                                                                                Steels & Iron
                                                   thread                                                    Close Fit
           Major    Threads    Minor                                             50% Thread
# or Dia                                    Drill         Decimal          Drill          Decimal    Drill
            Dia     Per Inch    Dia
                                            Size           Equiv.          Size            Equiv.    Size

   0       0.0600     80       0.0447      3/64           0.0469           55             0.0520     52
   1       0.0730     64       0.0538       53            0.0595            1/16          0.0625     48
                      72       0.0560       53            0.0595            52            0.0635
   2       0.0860     56       0.0641       50            0.0700            49            0.0730     43
                      64       0.0668       50            0.0700            48            0.0760
   3       0.0990     48       0.0734       47            0.0785            44            0.0860     37
                      56       0.0771       45            0.0820            43            0.0890
   4       0.1120     40       0.0813       43            0.0890            41            0.0960     32
                      48       0.0864       42            0.0935            40            0.0980
   5       0.1250     40       0.0943       38            0.1015           7/64           0.1094     30
                      44       0.0971       37            0.1040            35            0.1100
   6       0.1380     32       0.0997       36            0.1065            32            0.1160     27
                      40       0.1073       33            0.1130            31            0.1200
   8       0.1640     32       0.1257       29            0.1360            27            0.1440     18
                      36       0.1299       29            0.1360            26            0.1470
  10       0.1900     24       0.1389       25            0.1495            20            0.1610      9
                      32       0.1517       21            0.1590            18            0.1695
  12       0.2160     24       0.1649       16            0.1770            12            0.1890      2
                      28       0.1722       14            0.1820            10            0.1935
                      32       0.1777       13            0.1850             9            0.1960
  1/4      0.2500     20       0.1887        7            0.2010           7/32           0.2188      F
                      28       0.2062        3            0.2130             1            0.2280
                      32       0.2117      7/32           0.2188             1            0.2280
  5/16     0.3125     18       0.2443        F            0.2570             J            0.2770      P
                      24       0.2614        I            0.2720           9/32           0.2812
                      32       0.2742      9/32           0.2812             L            0.2900
  3/8      0.3750     16       0.2983       5/16          0.3125             Q            0.3320     W
                      24       0.3239        Q            0.3320             S            0.3480
                      32       0.3367     11/32           0.3438             T            0.3580
  7/16     0.4375     14       0.3499        U            0.3680          25/64           0.3906    29/64
                      20       0.3762     25/64           0.3906          13/32           0.4062
                      28       0.3937        Y            0.4040             Z            0.4130
  1/2      0.5000     13       0.4056     27/64           0.4219          29/64           0.4531    33/64
                      20       0.4387     29/64           0.4531          15/32           0.4688
                      28       0.4562     15/32           0.4688          15/32           0.4688
  9/16     0.5625     12       0.4603     31/64           0.4844          33/64           0.5156    37/64
                      18       0.4943     33/64           0.5156          17/32           0.5312
                      24       0.5114     33/64           0.5156          17/32           0.5312
  5/8      0.6250     11       0.5135     17/32           0.5312            9/16          0.5625    41/64
                      18       0.5568     37/64           0.5781          19/32           0.5938
                      24       0.5739     37/64           0.5781          19/32           0.5938
 11/16     0.6875     24       0.6364     41/64           0.6406          21/32           0.6562    45/64
  3/4      0.7500     10       0.6273     21/32           0.6562          11/16           0.6875    49/64

                                                    Page 1
                                   Tapping
                 16   0.6733   11/16    0.6875   45/64   0.7031
                 20   0.6887   45/64    0.7031   23/32   0.7188
13/16   0.8125   20   0.7512   49/64    0.7656   25/32   0.7812   53/64
  7/8   0.8750    9   0.7387   49/64    0.7656   51/64   0.7969   57/64
                 14   0.7874   13/16    0.8125   53/64   0.8281
                 20   0.8137   53/64    0.8281   27/32   0.8438
15/16   0.9375   20   0.8762   57/64    0.8906   29/32   0.9062   61/64
  1     1.0000    8   0.8466     7/8    0.8750   59/64   0.9219   1 1/64
                 12   0.8978   15/16    0.9375   61/64   0.9531
                 20   0.9387   61/64    0.9531   31/32   0.9688




                                   Page 2
                                                Tapping




Clearance Hole Drills
            All Materials
Close Fit                      Free Fit
       Decimal         Drill          Decimal
        Equiv.         Size            Equiv.

      0.0635           50            0.0700
      0.0760           46            0.0810

      0.0890           41            0.0960

      0.1040           35            0.1100

      0.1160           30            0.1285

      0.1285           29            0.1360

      0.1440           25            0.1495

      0.1695           16            0.1770

      0.1960            7            0.2010

      0.2210            1            0.2280


      0.2570            H            0.2660


      0.3230            Q            0.3320


      0.3860            X            0.3970


      0.4531         15/32           0.4687


      0.5156         17/32           0.5312


      0.5781         19/32           0.5938


      0.6406         21/32           0.6562


      0.7031         23/32           0.6562
      0.7656         25/32           0.7812

                                                Page 3
                           Tapping



0.8281   27/32    0.8438
0.8906   29/32    0.9062


0.9531   31/32    0.9688
1.0156   1 1/32   1.0313




                           Page 4
                                         Drill Sizes


Drill Sizes
Fraction Drill Decimal   Fraction Drill Decimal    Fraction Drill Decimal   Fraction Drill
          80    0.0135             42    0.0935              7     0.2010             X
          79    0.0145     3/32          0.0938     13/64          0.2031             Y
  1/64          0.0156             41    0.0960              6     0.2040    13/32
          78    0.0160             40    0.0980              5     0.2055             Z
          77    0.0180             39    0.0995              4     0.2090    27/64
          76    0.0200             38    0.1015              3     0.2130      7/16
          75    0.0210             37    0.1040      7/32          0.2188    29/64
          74    0.0225             36    0.1065              2     0.2210    15/32
          73    0.0240     7/64          0.1094              1     0.2280    31/64
          72    0.0250             35    0.1100              A     0.2340      1/2
          71    0.0260             34    0.1110     15/64          0.2344    33/64
          70    0.0280             33    0.1130              B     0.2380    17/32
          69    0.0292             32    0.1160              C     0.2420    35/64
          68    0.0310             31    0.1200              D     0.2460      9/16
  1/32          0.0312      1/8          0.1250       1/4    E     0.2500    37/64
          67    0.0320             30    0.1285              F     0.2570    19/32
          66    0.0330             29    0.1360              G     0.2610    39/64
          65    0.0350             28    0.1405     17/64          0.2656      5/8
          64    0.0360     9/64          0.1406              H     0.2660    41/64
          63    0.0370             27    0.1440              I     0.2720    21/32
          62    0.0380             26    0.1470              J     0.2770    43/64
          61    0.0390             25    0.1495              K     0.2810     11/16
          60    0.0400             24    0.1520      9/32          0.2812    45/64
          59    0.0410             23    0.1540              L     0.2900    23/32
          58    0.0420     5/32          0.1562              M     0.2950    47/64
          57    0.0430             22    0.1570     19/64          0.2969      3/4
          56    0.0465             21    0.1590              N     0.3020    49/64
  3/64          0.0469             20    0.1610       5/16         0.3125    25/32
          55    0.0520             19    0.1660              O     0.3160     51/64
          54    0.0550             18    0.1695              P     0.3230    13/16
          53    0.0595    11/64          0.1719     21/64          0.3281    53/64
   1/16         0.0625             17    0.1730              Q     0.3320    27/32
          52    0.0635             16    0.1770              R     0.3390    55/64
          51    0.0670             15    0.1800     11/32          0.3438      7/8
          50    0.0700             14    0.1820              S     0.3480    57/64
          49    0.0730             13    0.1850              T     0.3580    29/32
          48    0.0760      3/16         0.1875     23/64          0.3594    59/64
  5/64          0.0781             12    0.1890              U     0.3680    15/16
          47    0.0785             11    0.1910       3/8          0.3750    61/64
          46    0.0810             10    0.1935              V     0.3770    31/32
          45    0.0820              9    0.1960              W     0.3860    63/64
          44    0.0860              8    0.1990     25/64          0.3906       1
          43    0.0890




                                          Page 5
          Drill Sizes




Decimal
 0.3970
 0.4040
 0.4063
 0.4130
 0.4219
 0.4375
 0.4531
 0.4688
 0.4844
 0.5000
 0.5156
 0.5312
 0.5469
 0.5625
 0.5781
 0.5938
 0.6094
 0.6250
 0.6406
 0.6562
 0.6719
 0.6875
 0.7031
 0.7188
 0.7344
 0.7500
 0.7656
 0.7813
 0.7969
 0.8125
 0.8281
 0.8438
 0.8594
 0.8750
 0.8906
 0.9062
 0.9219
 0.9375
 0.9531
 0.9688
 0.9844
 1.0000




           Page 6
                                                                                                                                                       Speeds and Feeds



                 RPM at
Diameter         30 fpm      50 fpm     70 fpm          100 fpm      150 fpm     220 fpm     300 fpm    500 fpm
           0.1    1146.49682 1910.82803 2675.15924       3821.656051 5732.48408 8407.64331 11464.9682 19108.2803
           0.2    573.248408 955.414013 1337.57962       1910.828025 2866.24204 4203.82166 5732.48408 9554.14013
           0.3    382.165605 636.942675 891.719745        1273.88535 1910.82803 2802.54777 3821.65605 6369.42675
           0.4    286.624204 477.707006 668.789809       955.4140127 1433.12102 2101.91083 2866.24204 4777.07006
           0.5    229.299363 382.165605 535.031847       764.3312102 1146.49682 1681.52866 2292.99363 3821.65605
           0.6    191.082803 318.471338 445.859873       636.9426752 955.414013 1401.27389 1910.82803 3184.71338
           0.7    163.785259 272.975432 382.165605       545.9508644 818.926297    1201.0919 1637.85259 2729.75432                                                                                          10000
           0.8    143.312102 238.853503 334.394904       477.7070064   716.56051 1050.95541 1433.12102 2388.53503
           0.9    127.388535 212.314225 297.239915       424.6284501 636.942675    934.18259 1273.88535 2123.14225
             1    114.649682 191.082803 267.515924       382.1656051 573.248408 840.764331 1146.49682 1910.82803
             2    57.3248408 95.5414013 133.757962       191.0828025 286.624204 420.382166 573.248408 955.414013
             3    38.2165605 63.6942675 89.1719745        127.388535 191.082803 280.254777 382.165605 636.942675
             4    28.6624204 47.7707006 66.8789809       95.54140127 143.312102 210.191083 286.624204 477.707006                                                                                                                                                                                                                    500 fpm




                                                                                                                                                                                   Revolutions per Minute
             5    22.9299363 38.2165605 53.5031847       76.43312102 114.649682 168.152866 229.299363 382.165605
             6    19.1082803 31.8471338 44.5859873       63.69426752 95.5414013 140.127389 191.082803 318.471338                                                                                                                                                                                                                    300 fpm
             7    16.3785259 27.2975432 38.2165605       54.59508644 81.8926297    120.10919 163.785259 272.975432
             8    14.3312102 23.8853503 33.4394904       47.77070064   71.656051 105.095541 143.312102 238.853503                                                                                                                                                                                                                   220 fpm
             9    12.7388535 21.2314225 29.7239915       42.46284501 63.6942675    93.418259 127.388535 212.314225
                                                                                                                                                                                                                                                                                                                                    150 fpm
           10     11.4649682 19.1082803 26.7515924       38.21656051 57.3248408 84.0764331 114.649682 191.082803

                 50 fpm                   70 fpm                      100 fpm                 150 fpm                220 fpm             300 fpm                     500 fpm
                                                                                                                                                                                                             1000                                                                                                                   100 fpm
           0.1    1910.82803        0.1    2675.15924           0.1    3821.65605       0.1    5732.48408      0.1    8407.64331   0.1    11464.9682           0.1    19108.2803                                                                                                                                                    70 fpm
           0.2    955.414013        0.2    1337.57962           0.2    1910.82803       0.2    2866.24204      0.2    4203.82166   0.2    5732.48408           0.2    9554.14013
           0.3    636.942675        0.3    891.719745           0.3    1273.88535       0.3    1910.82803      0.3    2802.54777   0.3    3821.65605           0.3    6369.42675                                                                                                                                                    50 fpm
           0.4    477.707006        0.4    668.789809           0.4    955.414013       0.4    1433.12102      0.4    2101.91083   0.4    2866.24204           0.4    4777.07006
           0.5    382.165605        0.5    535.031847           0.5     764.33121       0.5    1146.49682      0.5    1681.52866   0.5    2292.99363           0.5    3821.65605                                                                                                                                                    30 fpm
           0.6    318.471338        0.6    445.859873           0.6    636.942675       0.6    955.414013      0.6    1401.27389   0.6    1910.82803           0.6    3184.71338
           0.7    272.975432        0.7    382.165605           0.7    545.950864       0.7    818.926297      0.7     1201.0919   0.7    1637.85259           0.7    2729.75432
           0.8    238.853503        0.8    334.394904           0.8    477.707006       0.8     716.56051      0.8    1050.95541   0.8    1433.12102           0.8    2388.53503
           0.9    212.314225        0.9    297.239915           0.9     424.62845       0.9    636.942675      0.9     934.18259   0.9    1273.88535           0.9    2123.14225
             1    191.082803          1    267.515924             1    382.165605         1    573.248408        1    840.764331     1    1146.49682             1    1910.82803
             2    95.5414013          2    133.757962             2    191.082803         2    286.624204        2    420.382166     2    573.248408             2    955.414013
             3    63.6942675          3    89.1719745             3    127.388535         3    191.082803        3    280.254777     3    382.165605             3    636.942675
             4    47.7707006          4    66.8789809             4    95.5414013         4    143.312102        4    210.191083     4    286.624204             4    477.707006                              100
             5    38.2165605          5    53.5031847             5     76.433121         5    114.649682        5    168.152866     5    229.299363             5    382.165605                                    0.1                                              1.0                                              10.0
             6    31.8471338          6    44.5859873             6    63.6942675         6    95.5414013        6    140.127389     6    191.082803             6    318.471338
             7    27.2975432          7    38.2165605             7    54.5950864         7    81.8926297        7     120.10919     7    163.785259             7    272.975432                                                                         Diameter in inches
             8    23.8853503          8    33.4394904             8    47.7707006         8     71.656051        8    105.095541     8    143.312102             8    238.853503
             9    21.2314225          9    29.7239915             9     42.462845         9    63.6942675        9     93.418259     9    127.388535             9    212.314225
           10     19.1082803         10    26.7515924            10    38.2165605        10    57.3248408       10    84.0764331    10    114.649682            10    191.082803                                   Cutting Speed in Feet per Minute (fpm)                       Milling Feed in Inches per Tooth
                                                                                                                                                                                                                                    Turning                                                        Material
                                                                                                                                                                                                                             Roughing     Finishing
                                                                                                                                                                                                               Material      .010-.020 .002-.010        Milling   Cutter Type Aluminum   Brass    Cast Iron   Steel   Alloy Steel
                                                                                                                                                                                                              Cast Iron        60-80       80-100       50-80      End Mill     0.009    0.007     0.004      0.005      0.003
                                                                                                                                                                                                             Low Carbon         130          160        60-90                   0.022    0.015     0.009      0.010      0.007
                                                                                                                                                                                                             Med Carbon         90           100        40-70                   0.016    0.012     0.007      0.008      0.005
                                                                                                                                                                                                                                                                   Face Mill
                                                                                                                                                                                                             High Carbon        50           65         30-50                   0.040    0.030     0.018      0.020      0.012
                                                                                                                                                                                                              Tool Steel        50           65         30-50        Saw        0.006    0.004     0.001      0.003      0.001
                                                                                                                                                                                                                Brass           160          220       70-175                   0.010    0.010     0.003      0.005      0.003
                                                                                                                                                                                                               Bronze           90           100       65-130     Form Cutter   0.006    0.005     0.004      0.004      0.003
                                                                                                                                                                                                              Aluminum        200-600     300-1000 500-1000                     0.010    0.009     0.007      0.006      0.005




                                                                                                                                                            Page 7

				
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