Tuesday, June 19, 2012

STANDARD TAP DIMENSIONS • GROUND THREAD


STANDARD TAP DIMENSIONS • GROUND THREAD


(Ref. USCTI Table 302, general dimensions)



SPECIAL TAPS



Nominal Diameter
Mach.
Nominal
Nominal
Black
Tap Dimensions -- Inches
Range-Inches
Screw
Fractional
Metric
Design
Overall
Thread
Square
Shank
Size of
Over
To(Incl.)
Size No.
Diameter
Diameter
No.
Length (L)
Length (l)
Length (l2)
Diameter (d1)
Square (a)
0.0520
0.0650
0          (.0600)
M1.6 (.0630)
1
1.63
0.31
0.19
1.1410
0.1100
0.0650
0.0780
1          (.0730)
M1.8 (0709)
1
1.69
0.38
0.19
1.1410
0.1100
0.0780
0.0910
2          (.0860)
M2(0787, M2.2 (.0866)
1
1.75
0.44
0.19
1.1410
0.1100
0.0910
0.1040
3          (.0990)
M2.5 (.0984)
1
1.81
0.50
0.19
1.1410
0.1100
0.1040
0.1170
4          (.1120)
1
1.88
0.56
0.19
1.1410
0.1100
0.1170
0.1300
5          (.1250)
M3 (.1181)
1
1.94
0.63
0.19
1.1410
0.1100
0.1300
0.1450
6            (1380)
M3.5 (.1378)
1
2.00
0.69
0.25
1.1410
0.1100
0.1450
0.1710
8           (.1640)
M4 (.1575)
1
2.13
0.75
0.25
0.1680
0.1310
0.1710
0.1970
10         (.1900)
M4.5(.1772), M5(.1969)
1
2.38
0.88
0.28
0.1940
0.1520
0.1970
0.2230
12         (.2160)
1
2.38
0.94
0.31
0.2200
0.1650
0.2230
0.2600
1/4            (.2500)
M6 (.2362)
2
2.50
1.00
0.38
0.2550
0.1910
0.2600
0.3230
5/16          (.3125)
M7 (.2756), M8(.3150)
2
2.72
1.13
0.44
0.3180
0.2380
0.3230
0.3950
3/8             (.3750)
M10 (.3937)
2
2.94
1.25
0.41
0.3810
0.2860
0.3950
0.4480
7/16          (.4375)
3
3.16
1.44
0.44
0.3230
0.2420
0.4480
0.5100
1/2            (.5000)
M12 (.4724)
3
3.38
1.66
0.50
0.3670
0.2750
0.5100
0.5730
9/16          (.5625)
M14 (.5512)
3
3.59
1.66
0.56
0.4290
0.3220
0.5730
0.6350
5/8            (.6250)
M16 (.6299)
3
3.81
1.81
0.63
0.4800
0.3600
0.6350
0.7090
11/16        (.6875)
M18 (.7087)
3
4.03
1.81
0.69
0.5420
0.4060
0.7090
0.7600
3/4             (.7500)
3
4.25
2.00
0.69
0.5900
0.4420
0.7600
0.8230
13/16         (.8125)
M20 (.7874)
3
4.47
2.00
0.75
0.6520
0.4890
0.8230
0.8850
7/8             (.8750)
M22 (.8661)
3
4.69
2.22
0.75
0.6970
0.5230
0.8850
0.9480
15/16        (.9375)
M24 (.9449)
3
4.91
2.22
0.81
0.7600
0.5700
0.9480
1.0100
1               (1.0000)
M25 (.9843)
3
5.13
2.50
0.88
0.8000
0.6000
1.0100
1.0730
1-1/16    (1.0625)
M27 (1.0630)
3
5.13
2.50
0.88
0.8960
0.6720
1.0730
1.1350
1-1/8       (1.1250)
3
5.44
2.56
1.00
0.8960
0.6720
1.1350
1.1980
1-3/16    (1.1875)
M30 (1.18111)
3
5.44
2.56
1.00
1.0210
0.7660
1.1980
1.2600
1-1/4      (1.2500)
3
5.75
2.56
1.00
1.0210
0.7660
1.2600
1.3230
1-5/16    (1.3125)
M33 (1.2992)
3
5.75
2.56
1.06
1.1080
0.8310
1.3230
1.3850
1-3/8      (1.3750)
3
6.06
3.00
1.06
1.1080
0.8310
1.3580
1.4480
1-7/16    (1.4375)
M36 (1.4173)
3
6.06
3.00
1.13
1.2330
0.9250
1.4480
1.5100
1-1/2      (1.5000)
3
6.38
3.00
1.13
1.2330
0.9250
1.5100
7.6350
1-5/8         (1.625)
M39 (1.5354)
3
6.69
3.19
1.13
1.3050
0.9790
1.6350
1.7600
1-3/4       (1.7500)
M42 (1.6535)
3
7.00
3.19
1.25
1.4300
1.0720
1.7600
1.8850
1-7/8       (1.8750)
3
7.31
3.56
1.25
1.5190
1.1390
1.8850
2.0100
 2               (2.0000)
M48 (1.8898)
3
7.63
3.56
1.38
1.6440
1.2330
2.010
2.135
2 1/8   (2.1250)
3
8.00
3.56
1.38
1.7690
1.327
2.135
2.260
2 1/4   (2.2500)
M56 (2.2047)
3
8.25
3.56
1.44
1.8940
1.420
2.260
2.385
2 3/8   (2.3750)
3
8.50
4.00
1.44
2.0190
1.514
2.385
2.510
2 1/2   (2.5000)
3
8.75
4.00
1.50
2.1000
1.575
2.510
2.635
2 5/8   (2.6250)
M64 (2.5197)
3
8.75
4.00
1.50
2.2250
1.669
2.635
2.760
2 3/4   (2.7500)
3
9.25
4.00
1.56
2.3500
1.762
2.760
2.885
2 7/8   (2.8750)
M72 (2.8346)
3
9.25
4.00
1.56
2.4750
1.856
2.885
3.010
3                (3.0000)
3
9.75
4.56
1.63
2.5430
1.907
3.010
3.135
3 1/8   (3.1250)
3
9.75
4.56
1.63
2.6680
2.001
3.135
3.260
3 1/4   (3.2500)
M80 (3.1496)
3
10.00
4.56
1.75
2.7930
2.095
3.260
3.385
3 3/8   (3.3750)
3
10.00
4.56
1.75
2.8830
2.162
3.385
3.510
3 1/2   (3.5000)
3
10.25
4.94
2.00
3.0080
2.256
3.510
3.635
3 5/8   (3.6250)
M90 (3.5433)
3
10.25
4.94
2.00
3.1330
2.350
3.635
3.760
3 3/4   (3.7500)
3
10.50
5.31
2.13
3.2170
2.413
3.760
3.885
3 7/8 (3.8750)
3
10.50
5.31
2.13
3.3420
2.506
3.885
4.010
4               (4.0000)
M100 (3.9370)
3
10.75
5.31
2.25
3.4670
2.600


Unless otherwise specified:


Special taps over 1.010” to 1.510” diameter inclusive, having 14 or more threads per inch or 1.75 millimeter pitch and finer, and sizes over 1.510” diameter with 10 or more threads per inch or 2.5 millimeter pitch and finer, are made to general dimensions shown in Table 303.


Special tap thread limits are determined by using the formulas shown in Table 331 for Unified Inch Screw Threads and Table 341 for Metric M-Profile Screw Threads

                                                                                                                       
NOTES


Tap sizes .395” and smaller have an external center on the thread end (may be removed on bottoming taps). Sizes .223” and smaller have an external center on the shank end. Sizes .224” thru .395 have truncated partial cone centers on the shank end (length of cone approx. ¼ of diameter shank). Sizes over .395” have internal centers on both the thread and shank ends.

For standard thread limits and tolerances for United Screw Threads see table 327 and for Metric Threads see table 337.


For eccentricity tolerances of tap elements see table 317.

For more info please vist www.taylortool.com


Tolerance
Element
Nominal Diameter
Direction
Range in Inches
Tolerance
Over
To(Inc.)
(Inches)
Length Overall - L
0.0520
1.0100
Plus or Minus
0.031
1.0100
4.0100
Plus or Minus
0.063
Length of thread - l
0.0520
0.2230
Plus or Minus
0.047
0.2230
0.5100
Plus or Minus
0.063
0.5100
1.5100
Plus or Minus
0.094
1.5100
4.0100
Plus or Minus
0.125
Length of square -  l2
0.0520
1.0100
Plus or Minus
0.031
1.0100
4.0100
Plus or Minus
0.063
Diameter of Shank - d1
0.0520
0.2230
Minus
0.0015
0.2230
0.6350
Minus
0.0015
0.6350
1.0100
Minus
.0020
1.0100
1.5100
Minus
.0020
1.5100
2.0100
Minus
.0030
2.0100
4.0100
Minus
.0030
Size of square - a
0.0520
0.5100
Minus
.004
0.5100
1.0100
Minus
.006
1.0100
2.0100
Minus
.008
2.0100
4.0100
Minus
.010




2 comments:

  1. This comment has been removed by a blog administrator.

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  2. Opps! Removed your comment by accident.

    Ill re-post it

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    ReplyDelete