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Tap Drill Chart - Model Engineering - The Australian Model

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Tap Drill Chart - Model Engineering - The Australian Model Powered By Docstoc
					                                                           Tap Drill Chart
                                                  To give 75% Thread Depth
Tap Size       BSW              BSF            UNC            UNF            BSP                 ANP               BA          ISO Metric
           TPI Drill size   TPI Drill size TPI Drill size TPI Drill size TPI Drill size     TPI    Drill size Size Drill size Tap Size mm Pitch Drill size
  1/16     60     3/64                                                                                         0       7           2      0:40 52 or 1.6
  1/8      40     3/32                                                    28    11/32       27       21/64     1      16           2      0:45 53 or 1.5
  5/32     32     1/8                                                                                                              3      0:50 39 or 2.5
  3/16     24     9/64      32     5/32    24      9/64    32     5/32                                         2      5/32         3      0:60 35 or 2.8
  7/32     24    11/64      28    11/64    24     11/64    32     3/16                                         3      29          3.5     0:60 32 or 2.95
  1/4      20    13/64      26     7/32    20     13/64    28     7/32    19    15/32       18       27/64     4      32           4      0:70 29 or 3.5
  5/16     18    17/64      22    17/64    18      1/4     24    17/64                                         5      37           4      0:75 28 or 3.6
  3/8      16     5/16      20    21/64    16      5/16    24    21/64    19    39/64       18        9/16                        4.5     0:75 25 or 3.8
  7/16     14     3/8       18    25/64    14      3/8     20    25/64                                         6      43           5      0:80 19 or 4.2
  1/2      12    27/64      16     7/16    13     27/64    20    29/64    14     3/4        14       11/16                         5      0:90 20 or 4.1
  9/16     12    31/64      16     1/2     12     31/64    18    33/64                                         7      46           6      1:00 8 or 5.1
  5/8      11    17/32      14     9/16    11     17/32    18    37/64    14    53/64                                              7      1:00 3 or 5.4
 11/16     11    19/32      14    39/64    11     19/32    16     5/8                                          8      50           8      1:25 H or 6.8
  3/4      10    21/32      12    43/64    10     21/32    16    11/16    14    31/32       14       57/64                         9      1:25 N or 7.6
  7/8       9    49/64      11    25/32     9     49/64    14    13/16    14   1 1/8                           9      53           10     1:50 R or 8.6
1           8     7/8       10    29/32     8      7/8     12    29/32    11   1 7/32     11 1/2    1 1/8      10     54           11     1:50     3/8
1 1/8       7    63/64       9   1 1/64     7     63/64    12   1 3/64                                                             12     1:75    13/32
1 1/4       7   1 7/64       9   1 9/64     7    1 7/64    12   1 11/64   11   1 9/16     11 1/2    1 15/32    11     3/64         14     2:00    15/32
1 3/8       6   1 7/32       8   1 1/4      6    1 13/64   12   1 19/64                                                            16     2:00     9/16
1 1/2       6   1 11/32      8   1 3/8      6    1 11/32   12   1 27/64   11   1 51/64    11 1/2    1 23/32    12     59           18     2:50    39/64
1 5/8       5   1 7/16       8   1 1/2                                                                                             20     2:50    11/16
1 3/4       5   1 9/16       7   1 39/64    5    1 9/16                   11   2 1/32                                              22     2:50    49/64
2          4.5 1 25/32       7   1 55/64   4.5   1 25/32                  11   2 17/64    11 1/2    2 3/16                         24     3:00    53/64

				
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