The Use of Ropes and Tackle

by Homer J. Dana; W. A. Pearl

POWER TRANSMITTED BY WIRE ROPE

Wire Rope Drives

Diam. of Wheel in Feet	No. of Revolutions Per Minute	Diam. of Rope	Horse Power
3	80	3⁄8	3
3	100	3⁄8	3 1⁄2
3	120	3⁄8	4
3	140	3⁄8	4 1⁄2
4	80	3⁄8	4
4	100	3⁄8	5
4	120	3⁄8	6
4	140	3⁄8	7
5	80	7⁄16	9
5	100	7⁄16	11
5	120	7⁄16	13
5	140	7⁄16	15
6	80	1⁄2	14
6	100	1⁄2	17
6	120	1⁄2	20
6	140	1⁄2	23
7	80	9⁄16	20
7	100	9⁄16	25
7	120	9⁄16	30
7	140	9⁄16	35
8	80	5⁄8	26
8	100	5⁄8	32
8	120	5⁄8	39
8	140	5⁄8	45
		9⁄16	47
9	80	5⁄8	48
		9⁄16	58
9	100	5⁄8	60
		9⁄16	69
9	120	5⁄8	73
		9⁄16	82
9	140	5⁄8	84
10	80	5⁄8	64
		11⁄16	68
10	100	5⁄8	80
		11⁄16	85
10	120	5⁄8	96
		11⁄16	102
10	140	5⁄8	112
		11⁄16	119
12	80	11⁄16	93
		3⁄4	99
12	100	11⁄16	116
		3⁄4	124
12	120	11⁄16	140
		3⁄4	149
12	120	7⁄8	173
14	80	1	141
		1 1⁄8	148
14	100	1	176
		1 1⁄8	185

MINIMUM DIAMETERS OF SHEAVES FOR
POWER TRANSMISSION BY WIRE ROPES

(All Dimensions in Inches)

Rope Diam.	Steel		Iron
	7-Wire	19-Wire	7-Wire	19-Wire
1⁄4	20	12	40	24
5⁄16	25	15	50	30
3⁄8	30	18	60	36
7⁄16	35	21	70	42
1⁄2	40	24	80	48
9⁄16	45	27	90	54
5⁄8	50	30	100	60
11⁄16	55	32	110	66
3⁄4	60	35	120	72
7⁄8	70	41	140	84
1	80	47	160	96
1 1⁄8	90	53	180	108
1 1⁄4	100	58	200	120
1 3⁄8	110	64	220	132
1 1⁄2	120	70	240	144

DIAMETER OF MINIMUM SHEAVES IN INCHES,
CORRESPONDING TO A MAXIMUM
SAFE WORKING TENSION.

Diam. of Rope in Inches	Steel			Iron
	7-Wire	12-Wire	19-Wire	7-Wire	12-Wire	19-Wire
1⁄4	19	15	11	39	31	23
5⁄16	24	19	14	49	38	29
3⁄8	29	22	17	59	46	35
7⁄16	34	26	19	69	54	41
1⁄2	38	30	22	79	61	47
9⁄16	43	33	25	89	69	52
5⁄8	48	37	28	99	77	58
11⁄16	53	41	31	109	84	64
3⁄4	58	44	34	119	92	70
7⁄8	67	52	39	138	107	81
1	77	59	45	158	123	93