Machining Reference Info

Collets

Tapers

Tap & Drill Chart

Machining Reference Info

This is a collection of information that I keep finding myself searching for when I'm not at home with all my reference materials at hand. I hope you will find it as handy as I am.
Ty Hoeffer

Machine Shop Trade Secrets
Something every machinist should read 'IMHO'... Ty

For a review of this book click here
Look under Shop Notes---> Book Reviews

I'll review this book when I'm done reading as well,
Ty

Collet Specifications

Figure 1

Figure 2

Dimensions

Back Bearing Diameter

Overall Length

Thread

Rated Capacities

Collet

Figure

A

B

C

Round

Hexagon

Square

2M

2 Morse

2.875"

3/₈-16 RH

1/₂"

7/₁₆"

11/₃₂"

3AT

1

0.687"

2.313"

0.637-26 RH

1/₂"

7/₁₆"

11/₃₂"

3C

1

0.650"

2.688"

0.640-26 RH

1/₂"

7/₁₆"

11/₃₂"

3J

1

2.000"

3.750"

1.988-20 RH

1 ¹/₂"

1 ¹/₂"

1 ¹/₄"

4C

1

0.950"

3.000"

0.938-20 RH

3/₄"

21/₃₂"

17/₃₂"

5C

1

1.250"

3.281"

1.238-20 RH

1 ¹/₁₆"

29/₃₂"

3/₄"

R8

2

0.950"

4.000"

0.437-20 RH

3/₄"

41/₆₄"

17/₃₂"

TAPERS

Jacobs Taper

LARGE

SMALL

LENGTH

0

0.25000

0.22844

0.43750

1

0.38400

0.33341

0.65625

2

0.55900

0.48764

0.87500

2 Short

0.54880

0.48764

0.75000

3

0.81100

0.74610

1.21875

4

1.12400

1.03720

1.65625

5

1.41300

1.31611

1.87500

6

0.67600

0.62409

1.00000

33

0.62401

0.56051

1.00000

Morse Taper

LARGE

SMALL

LENGTH

(A)

(B)

0

0.36510

0.25200

1-15/16

1

0.47500

0.36900

2-1/16

2

0.70000

0.57200

2-1/2

3

0.93800

0.77800

3-1/16

4

1.23100

1.02000

3-7/8

4-1/2

1.50000

1.26600

4-5/16

5

1.74800

1.47500

4-15/16

6

2.49400

2.11600

7

7

3.27000

2.75000

9-1/2

Brown & Sharp

LARGE

SMALL

LENGTH

(A)

(B)

1

0.23922

0.20000

15/16

2

0.29968

0.25000

1-3/16

3

0.37525

0.31250

1-1/2

4

0.40233

0.35000

1-1/4

5

0.52315

0.45000

1-3/4

6

0.59961

0.50000

2-3/8

7

0.72537

0.60000

3

8

0.89873

0.75000

3-9/16

9

1.06705

0.90010

4

10

1.28927

1.04465

5-11/16

11

1.53176

1.24995

6-3/4

12

1.79681

1.50010

7-1/8

13

2.07310

1.75005

7-3/4

14

2.34375

2.00000

8-1/4

15

2.61458

2.25000

8-3/4

TAP DRILL CHART

TAP TAP DRILL Decimal Drill Size Theo. % of Thread Probable Oversize Probable Hole Size % of THREAD

0-80 56 .0465 83 .0015 .0480 74

3/64 .0469 81 .0015 .0480 71

1-64 54 .0550 89 .0015 .0565 81

53 .0595 67 .0015 .0610 59

1-72 53 .0595 75 .0015 .0610 67

1/16 .0625 58 .0015 .0640 50

2-56 51 .0670 82 .0017 .0687 74

50 .0700 69 .0017 .0717 62

49 .0730 56 .0017 .0747 49

2-64 50 .0700 79 .0017 .0717 70

49 .0730 64 .0017 .0747 56

3-48 48 .0760 85 .0019 .0779 78

5/64 .0781 77 .0019 .0800 70

47 .0785 76 .0019 .0804 69

46 .0810 67 .0019 .0829 60

45 .0820 63 .0019 .0839 56

3-56 46 .0810 78 .0019 .0829 69

45 .0820 73 .0019 .0839 65

44 .0860 56 .0020 .0880 47

4-40 44 .0860 80 .0020 .0880 74

43 .0890 71 .0020 .0910 65

42 .0935 57 .0020 .0955 51

3/32 .0938 56 .0020 .0958 50

4-48 42 .0935 68 .0020 .0955 61

3/32 .0938 68 .0020 .0958 60

41 .0960 59 .0020 .0980 52

5-40 40 .0980 83 .0023 .1003 76

39 .0995 79 .0023 .1018 71

38 .1015 72 .0023 .1038 65

37 .1040 65 .0023 .1063 58

5-44 38 .1015 79 .0023 .1038 72

37 .1040 71 .0023 .1063 63

36 .1065 63 .0023 .1088 55

6-32 37 .1040 84 .0023 .1063 78

36 .1065 78 .0023 .1088 72

7-64 .1094 70 .0026 .1120 64

35 .1100 69 .0026 .1126 63

34 .1110 67 .0026 .1136 60

33 .1130 62 .0026 .1156 55

6-40 34 .1110 83 .0026 .1136 75

33 .1130 77 .0026 .1156 69

32 .1160 68 .0026 .1186 60

8-32 29 .1360 69 .0029 .1389 62

28 .1405 58 .0029 .1434 51

8-36 29 .1360 78 .0029 .1389 70

28 .1405 68 .0029 .1434 57

9-64 .1406 68 .0029 .1435 57

10-24 27 .1440 85 .0032 .1472 79

26 .1470 79 .0032 .1502 74

25 .1495 75 .0032 .1527 69

24 .1520 70 .0032 .1552 64

23 .1540 67 .0032 .1572 61

10-32 5/32 .1563 83 .0032 .1595 75

22 .1570 81 .0032 .1602 73

21 .1590 76 .0032 .1622 68

20 .1610 71 .0032 .1642 64

19 .1660 59 .0032 .1692 51

12-24 11/64 .1719 82 .0035 .1754 75

17 .1730 79 .0035 .1765 73

16 .1770 72 .0035 .1805 66

15 .1800 67 .0035 .1835 60

14 .1820 63 .0035 .1855 56

12-28 16 .1770 84 .0035 .1805 77

15 .1800 78 .0035 .1835 70

14 .1820 73 .0035 .1855 66

13 .1850 67 .0035 .1885 59

3/16 .1875 61 .0035 .1910 54

1/4-20 9 .1960 83 .0038 .1998 77

8 .1990 79 .0038 .2028 73

7 .2010 75 .0038 .2048 70

13/64 .2013 72 .0038 .2069 66

6 .2040 71 .0038 .2078 65

5 .2055 69 .0038 .2093 63

4 .2090 63 .0038 .2128 57

1/4-28 3 .2130 80 .0038 .2168 72

7/32 .2188 67 .0038 .2226 59

2 .2210 63 .0038 .2248 55

5/16-18 F .2570 77 .0038 .2608 72

G .2610 71 .0041 .2651 66

17/64 .2656 65 .0041 .2697 59

H .2660 64 .0041 .2701 59

5/16-24 H .2660 86 .0041 .2701 78

I .2720 75 .0041 .2761 67

J .2770 66 .0041 .2811 58

3/8-16 5/16 .3125 77 .0044 .3169 72

O .3160 73 .0044 .3204 68

P .323 64 .0044 .3274 59

3/8-24 21/64 .3281 87 .0044 .3325 79

Q .3320 79 .0044 .3364 71

R .3390 67 .0044 .3434 58

7/16-14 T .3580 86 .0046 .3626 81

23/64 .3594 84 .0046 .3640 79

U .3680 75 .0046 .3726 70

3/8 .3750 67 .0046 .3796 62

V .3770 65 .0046 .3816 60

7/16-20 W .3860 79 .0046 .3906 72

25/64 .3906 72 .0046 .3952 65

X .3970 62 .0046 .4016 55

1/2-13 27/64 .4219 78 .0047 .4266 73

7/16 .4375 63 .0047 .4422 58

1/2-20 29/64 .4531 72 .0047 .4578 65

9/16-12 15/32 .4688 87 .0048 .4736 82

31/64 .4844 72 .0048 .4892 68

9/16-18 1/2 .500 87 .0048 .5048 80

33/64 .5156 65 .0048 .5204 58

5/8-11 17/32 .5313 79 .0049 .5362 75

35/64 .5469 66 .0049 .5518 62

5/8-18 9/16 .5625 87 .0049 .5674 80

37/64 .5781 65 .0049 .5831 58

3/4-10 41/64 .6406 84 .0050 .6456 80

21/32 .6563 72 .0050 .6613 68

3/4-16 11/16 .6875 77 .0050 .6925 71

7/8-9 49/64 .7656 76 .0052 .7708 72

25/32 .7812 65 .0052 .7864 61

7/8-14 51/64 .7969 84 .0052 .8021 79

13/16 .8125 67 .0052 .8177 62

1-8 55/64 .8594 87 .0059 .8653 83

7/8 .875 77 .0059 .8809 73

57/64 .8906 67 .0059 .8965 64

29/32 .9063 58 .0059 .9122 54

1-12 29/32 .9063 87 .0059 .9122 81

59/64 .9219 72 .0060 .9279 67

15/16 .9375 58 .0060 .9435 52

1-14 59-64 .9219 84 .0060 .9279 78

15/16 .9375 67 .0060 .9435 61

1 1/8-7 31/32 .9688 84 .0062 .9750 81

63/64 .9844 76 .0067 .9911 72

1 1.000 67 .0070 1.007 64

1 1/64 1.0156 59 .0070 1.0226 55

1 1/8-12 1 1/32 1.0313 87 .0071 1.0384 80

1 3/64 1.0469 72 .0072 1.0541 66

1 1/4-7 1 3/32 1.0938 84 REAMING RECOMMENDED

1 7/64 1.1094 76 REAMING RECOMMENDED

1 1/8 1.125 67 REAMING RECOMMENDED

1 1/4-12 1 5/32 1.1563 87 REAMING RECOMMENDED

1 11/64 1.1719 72 REAMING RECOMMENDED

1 3/8-6 1 3/16 1.1875 87 REAMING RECOMMENDED

1 13/64 1.2031 79 REAMING RECOMMENDED

1 7/32 1.2188 72 REAMING RECOMMENDED

1 15/64 1.2344 65 REAMING RECOMMENDED

1 3/8-12 1 9/32 1.2813 87 REAMING RECOMMENDED

1 19/64 1.2969 72 REAMING RECOMMENDED

1 1/2-6 1 5/16 1.3125 87 REAMING RECOMMENDED

1 21/64 1.3281 79 REAMING RECOMMENDED

1 11/32 1.3438 72 REAMING RECOMMENDED

1 23/64 1.3594 65 REAMING RECOMMENDED

1 1/2-12 1 13/32 1.4063 87 REAMING RECOMMENDED

1 27/64 1.4219 72 REAMING RECOMMENDED

Last updated 01/24/2000

You are Visitor number since 01/20/2000

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Dimensions
		Back Bearing Diameter	Overall Length	Thread	Rated Capacities
Collet	Figure	A	B	C	Round	Hexagon	Square
2M		2 Morse	2.875"	3/₈-16 RH	1/₂"	7/₁₆"	11/₃₂"
3AT	1	0.687"	2.313"	0.637-26 RH	1/₂"	7/₁₆"	11/₃₂"
3C	1	0.650"	2.688"	0.640-26 RH	1/₂"	7/₁₆"	11/₃₂"
3J	1	2.000"	3.750"	1.988-20 RH	1 ¹/₂"	1 ¹/₂"	1 ¹/₄"
4C	1	0.950"	3.000"	0.938-20 RH	3/₄"	21/₃₂"	17/₃₂"
5C	1	1.250"	3.281"	1.238-20 RH	1 ¹/₁₆"	29/₃₂"	3/₄"
R8	2	0.950"	4.000"	0.437-20 RH	3/₄"	41/₆₄"	17/₃₂"

Jacobs Taper	LARGE	SMALL	LENGTH
0	0.25000	0.22844	0.43750
1	0.38400	0.33341	0.65625
2	0.55900	0.48764	0.87500
2 Short	0.54880	0.48764	0.75000
3	0.81100	0.74610	1.21875
4	1.12400	1.03720	1.65625
5	1.41300	1.31611	1.87500
6	0.67600	0.62409	1.00000
33	0.62401	0.56051	1.00000

Morse Taper	LARGE	SMALL	LENGTH
	(A)	(B)
0	0.36510	0.25200	1-15/16
1	0.47500	0.36900	2-1/16
2	0.70000	0.57200	2-1/2
3	0.93800	0.77800	3-1/16
4	1.23100	1.02000	3-7/8
4-1/2	1.50000	1.26600	4-5/16
5	1.74800	1.47500	4-15/16
6	2.49400	2.11600	7
7	3.27000	2.75000	9-1/2

Brown & Sharp	LARGE	SMALL	LENGTH
	(A)	(B)
1	0.23922	0.20000	15/16
2	0.29968	0.25000	1-3/16
3	0.37525	0.31250	1-1/2
4	0.40233	0.35000	1-1/4
5	0.52315	0.45000	1-3/4
6	0.59961	0.50000	2-3/8
7	0.72537	0.60000	3
8	0.89873	0.75000	3-9/16
9	1.06705	0.90010	4
10	1.28927	1.04465	5-11/16
11	1.53176	1.24995	6-3/4
12	1.79681	1.50010	7-1/8
13	2.07310	1.75005	7-3/4
14	2.34375	2.00000	8-1/4
15	2.61458	2.25000	8-3/4

TAP	TAP DRILL	Decimal Drill Size	Theo. % of Thread	Probable Oversize	Probable Hole Size	% of THREAD
0-80	56	.0465	83	.0015	.0480	74
	3/64	.0469	81	.0015	.0480	71
1-64	54	.0550	89	.0015	.0565	81
	53	.0595	67	.0015	.0610	59
1-72	53	.0595	75	.0015	.0610	67
	1/16	.0625	58	.0015	.0640	50
2-56	51	.0670	82	.0017	.0687	74
	50	.0700	69	.0017	.0717	62
	49	.0730	56	.0017	.0747	49
2-64	50	.0700	79	.0017	.0717	70
	49	.0730	64	.0017	.0747	56
3-48	48	.0760	85	.0019	.0779	78
	5/64	.0781	77	.0019	.0800	70
	47	.0785	76	.0019	.0804	69
	46	.0810	67	.0019	.0829	60
	45	.0820	63	.0019	.0839	56
3-56	46	.0810	78	.0019	.0829	69
	45	.0820	73	.0019	.0839	65
	44	.0860	56	.0020	.0880	47
4-40	44	.0860	80	.0020	.0880	74
	43	.0890	71	.0020	.0910	65
	42	.0935	57	.0020	.0955	51
	3/32	.0938	56	.0020	.0958	50
4-48	42	.0935	68	.0020	.0955	61
	3/32	.0938	68	.0020	.0958	60
	41	.0960	59	.0020	.0980	52
5-40	40	.0980	83	.0023	.1003	76
	39	.0995	79	.0023	.1018	71
	38	.1015	72	.0023	.1038	65
	37	.1040	65	.0023	.1063	58
5-44	38	.1015	79	.0023	.1038	72
	37	.1040	71	.0023	.1063	63
	36	.1065	63	.0023	.1088	55
6-32	37	.1040	84	.0023	.1063	78
	36	.1065	78	.0023	.1088	72
	7-64	.1094	70	.0026	.1120	64
	35	.1100	69	.0026	.1126	63
	34	.1110	67	.0026	.1136	60
	33	.1130	62	.0026	.1156	55
6-40	34	.1110	83	.0026	.1136	75
	33	.1130	77	.0026	.1156	69
	32	.1160	68	.0026	.1186	60
8-32	29	.1360	69	.0029	.1389	62
	28	.1405	58	.0029	.1434	51
8-36	29	.1360	78	.0029	.1389	70
	28	.1405	68	.0029	.1434	57
	9-64	.1406	68	.0029	.1435	57
10-24	27	.1440	85	.0032	.1472	79
	26	.1470	79	.0032	.1502	74
	25	.1495	75	.0032	.1527	69
	24	.1520	70	.0032	.1552	64
	23	.1540	67	.0032	.1572	61
10-32	5/32	.1563	83	.0032	.1595	75
	22	.1570	81	.0032	.1602	73
	21	.1590	76	.0032	.1622	68
	20	.1610	71	.0032	.1642	64
	19	.1660	59	.0032	.1692	51
12-24	11/64	.1719	82	.0035	.1754	75
	17	.1730	79	.0035	.1765	73
	16	.1770	72	.0035	.1805	66
	15	.1800	67	.0035	.1835	60
	14	.1820	63	.0035	.1855	56
12-28	16	.1770	84	.0035	.1805	77
	15	.1800	78	.0035	.1835	70
	14	.1820	73	.0035	.1855	66
	13	.1850	67	.0035	.1885	59
	3/16	.1875	61	.0035	.1910	54
1/4-20	9	.1960	83	.0038	.1998	77
	8	.1990	79	.0038	.2028	73
	7	.2010	75	.0038	.2048	70
	13/64	.2013	72	.0038	.2069	66
	6	.2040	71	.0038	.2078	65
	5	.2055	69	.0038	.2093	63
	4	.2090	63	.0038	.2128	57
1/4-28	3	.2130	80	.0038	.2168	72
	7/32	.2188	67	.0038	.2226	59
	2	.2210	63	.0038	.2248	55
5/16-18	F	.2570	77	.0038	.2608	72
	G	.2610	71	.0041	.2651	66
	17/64	.2656	65	.0041	.2697	59
	H	.2660	64	.0041	.2701	59
5/16-24	H	.2660	86	.0041	.2701	78
	I	.2720	75	.0041	.2761	67
	J	.2770	66	.0041	.2811	58
3/8-16	5/16	.3125	77	.0044	.3169	72
	O	.3160	73	.0044	.3204	68
	P	.323	64	.0044	.3274	59
3/8-24	21/64	.3281	87	.0044	.3325	79
	Q	.3320	79	.0044	.3364	71
	R	.3390	67	.0044	.3434	58
7/16-14	T	.3580	86	.0046	.3626	81
	23/64	.3594	84	.0046	.3640	79
	U	.3680	75	.0046	.3726	70
	3/8	.3750	67	.0046	.3796	62
	V	.3770	65	.0046	.3816	60
7/16-20	W	.3860	79	.0046	.3906	72
	25/64	.3906	72	.0046	.3952	65
	X	.3970	62	.0046	.4016	55
1/2-13	27/64	.4219	78	.0047	.4266	73
	7/16	.4375	63	.0047	.4422	58
1/2-20	29/64	.4531	72	.0047	.4578	65
9/16-12	15/32	.4688	87	.0048	.4736	82
	31/64	.4844	72	.0048	.4892	68
9/16-18	1/2	.500	87	.0048	.5048	80
	33/64	.5156	65	.0048	.5204	58
5/8-11	17/32	.5313	79	.0049	.5362	75
	35/64	.5469	66	.0049	.5518	62
5/8-18	9/16	.5625	87	.0049	.5674	80
	37/64	.5781	65	.0049	.5831	58
3/4-10	41/64	.6406	84	.0050	.6456	80
	21/32	.6563	72	.0050	.6613	68
3/4-16	11/16	.6875	77	.0050	.6925	71
7/8-9	49/64	.7656	76	.0052	.7708	72
	25/32	.7812	65	.0052	.7864	61
7/8-14	51/64	.7969	84	.0052	.8021	79
	13/16	.8125	67	.0052	.8177	62
1-8	55/64	.8594	87	.0059	.8653	83
	7/8	.875	77	.0059	.8809	73
	57/64	.8906	67	.0059	.8965	64
	29/32	.9063	58	.0059	.9122	54
1-12	29/32	.9063	87	.0059	.9122	81
	59/64	.9219	72	.0060	.9279	67
	15/16	.9375	58	.0060	.9435	52
1-14	59-64	.9219	84	.0060	.9279	78
	15/16	.9375	67	.0060	.9435	61
1 1/8-7	31/32	.9688	84	.0062	.9750	81
	63/64	.9844	76	.0067	.9911	72
	1	1.000	67	.0070	1.007	64
	1 1/64	1.0156	59	.0070	1.0226	55
1 1/8-12	1 1/32	1.0313	87	.0071	1.0384	80
	1 3/64	1.0469	72	.0072	1.0541	66
1 1/4-7	1 3/32	1.0938	84	REAMING RECOMMENDED
	1 7/64	1.1094	76	REAMING RECOMMENDED
	1 1/8	1.125	67	REAMING RECOMMENDED
1 1/4-12	1 5/32	1.1563	87	REAMING RECOMMENDED
	1 11/64	1.1719	72	REAMING RECOMMENDED
1 3/8-6	1 3/16	1.1875	87	REAMING RECOMMENDED
	1 13/64	1.2031	79	REAMING RECOMMENDED
	1 7/32	1.2188	72	REAMING RECOMMENDED
	1 15/64	1.2344	65	REAMING RECOMMENDED
1 3/8-12	1 9/32	1.2813	87	REAMING RECOMMENDED
	1 19/64	1.2969	72	REAMING RECOMMENDED
1 1/2-6	1 5/16	1.3125	87	REAMING RECOMMENDED
	1 21/64	1.3281	79	REAMING RECOMMENDED
	1 11/32	1.3438	72	REAMING RECOMMENDED
	1 23/64	1.3594	65	REAMING RECOMMENDED
1 1/2-12	1 13/32	1.4063	87	REAMING RECOMMENDED
	1 27/64	1.4219	72	REAMING RECOMMENDED