Modern Machine-Shop Practice, Volumes I and II

by Joshua Rose

DIAMETER OF STUBS’S DRAWN STEEL WIRE IN FRACTIONAL PARTS OF AN INCH.

No. by Stubs’s wire- gauge.	Stubs’s Dimen- sions.	Measure- ment by Morse Twist- Drill & Machine Co.	No. by Stubs’s wire- gauge.	Stubs’s Dimen- sions.	Measure- ment by Morse Twist- Drill & Machine Co.	No. by Stubs’s wire- gauge.	Stubs’s Dimen- sions.	Measure- ment by Morse Twist- Drill & Machine Co.
1	.227	.228	23	.153	.154	45	.081	.082
2	.219	.221	24	.151	.152	46	.079	.080
3	.212	.213	25	.148	.150	47	.077	.079
4	.207	.209	26	.146	.148	48	.075	.076
5	.204	.206	27	.143	.145	49	.072	.073
6	.201	.204	28	.139	.141	50	.069	.070
7	.199	.201	29	.134	.136	51	.066	.067
8	.197	.199	30	.127	.129	52	.063	.064
9	.194	.196	31	.120	.120	53	.058	.060
10	.191	.194	32	.115	.116	54	.055	.054
11	.188	.191	33	.112	.113	55	.050	.052
12	.185	.188	34	.110	.111	56	.045	.047
13	.182	.185	35	.108	.110	57	.042	.044
14	.180	.182	36	.106	.106	58	.041	.042
15	.178	.180	37	.103	.104	59	.040	.041
16	.175	.177	38	.101	.101	60	.039	.040
17	.172	.173	39	.099	.100	61	.038	.039
18	.168	.170	40	.097	.098	62	.037	.038
19	.164	.166	41	.095	.096	63	.036	.037
20	.161	.161	42	.092	.094	64	.035	.036
21	.157	.159	43	.088	.089	65	.033	.035
22	.155	.156	44	.085	.086

The following table represents the letter sizes of the same wire:—

LETTER SIZES OF WIRE.

A.	0.234	J.	0.277	S.	0.348
B.	0.238	K.	0.281	T.	0.358
C.	0.242	L.	0.290	U.	0.368
D.	0.246	M.	0.295	V.	0.377
E.	0.250	N.	0.302	W.	0.386
F.	0.257	O.	0.316	X.	0.397
G.	0.261	P.	0.323	Y.	0.404
H.	0.266	Q.	0.332	Z.	0.413
I.	0.272	R.	0.339

By an Order in Council dated August 23rd, 1883, and which took effect on March 1st, 1884, the standard department of the British Board of Trade substituted for the old Birmingham wire-gauge the following:—

Descriptive number B. W. G. No.		Equivalents in parts of an inch.	Descriptive number B. W. G. No.	Equivalents in parts of an inch.
No.		Inch.	No.	Inch.
7	/0	0.500	23	0.024
6	/0	.464	24	.022
5	/0	.432	25	.020
4	/0	.400	26	.018
3	/0	.372	27	.016	4
2	/0	.348	28	.014	8
0		.324	29	.013	6
1		.300	30	.012	4
2		.276	31	.011	6
3		.252	32	.010	8
4		.232	33	.010	0
5		.212	34	.009	2
6		.192	35	.008	4
7		.176	36	.007	6
8		.160	37	.006	8
9		.144	38	.006	0
10		.128	39	.005	2
11		.116	40	.004	8
12		.104	41	.004	4
13		.092	42	.004	0
14		.080	43	.003	6
15		.072	44	.003	2
16		.064	45	.002	8
17		.056	46	.002	4
18		.048	47	.002	0
19		.040	48	.001	6
20		.036	49	.001	2
21		.032	50	.001	0
22		.028