Full Load Running (torque of motors in LB. - IN.)
Inertia
Torque
Miscellaneous

INERTIA CHART I=WR$2$ of Steel (per inch of length) DIA. (IN.) WR$2$ (LB.-IN.$2$) DIA. (IN.) WR$2$ (LB.-IN.$2$) DIA. (IN.) WR$2$ (LB.-IN.$2$) 1/4 .00011 8-3/4 162.72 29 19589.76 5/16 .00027 9 182.88 30 22452.48 3/8 .00055 9-1/4 203.04 31 25598.88 7/16 .00102 9-1/2 233.20 32 29059.2 1/2 .00173 9-3/4 252.00 33 32860.8 9/16 .00279 10 277.92 34 37036.8 5/8 .00425 10-1/4 306.72 35 41587.2 11/16 .00623 10-1/2 338.4 36 46540.8 3/4 .00864 10-3/4 371.52 37 51940.8 13/16 .01215 11 407.52 38 57787.2 7/8 .01634 11-1/4 444.96 39 64123.2 15/16 .02154 11-1/2 486.72 40 70963.2 1 .0288 11-3/4 592.92 40 78321.6 1-1/4 .0720 12 576.00 42 86227.2 1-1/2 .144 12-1/4 626.10 43 94766.4 1-3/4 .288 12-1/2 679.88 44 103881.6 2 .432 14-3/4 735.84 45 113659.2 2-1/4 .720 13 803.52 46 124099.2 2-1/2 1.152 13-1/4 858.24 47 135259.2 2-3/4 1.584 13-1/2 924.48 48 147139.2 3 2.304 13-3/4 995.04 49 159782.4 3-1/2 4.176 14 1068.48 50 173246.4 3-3/4 5.472 14-1/4 1147.68 51 187516.8 4 7.056 14-1/2 1229.76 52 202665.6 4-1/4 9.072 14-3/4 1317.60 53 218707.2 4-1/2 11.376 15 1404.00 54 235684.8 5 17.280 16 1815.84 55 253641.6 5-1/2 25.488 17 2314.08 56 272606.4 6 36.000 18 2910.24 57 292593.6 6-1/4 42.624 19 3611.52 58 313675.2 6-1/2 49.680 20 4433.76 59 335880.0 6-3/4 57.888 21 5389.92 60 359238.8 7 66.816 22 6492.96 66 525960.0 7-1/4 77.040 23 7757.28 72 744768.0 7-1/2 87.984 24 9195.84 78 1026000.0 7-3/4 100.656 25 10827.36 84 1380069.0 8 113.904 26 12666.24 90 1818576.0 8-1/4 128.880 27 14731.20 96 2354256.0 8-1/2 144.00 28 17036.64 102 3000384.0 NOTES: 1. To determine WR2 of a given shaft, multiply the WR2 given above by the length of the shaft or the thickness of the disc in inches. 2. For hollow shafts, subtract WR2 of ID from WR2 of OD and multiply by length.

INERTIA CONVERSION CHART To determine the inertia of a rotating member of a material other than steel, multiply the inertia of the steel diameter from the Inertia Chart at left by: MATERIAL MULTIPLIER Bronze 1.05 Steel 1.00 Iron 0.92 Powdered Bronze 0.79 Powdered Metal Iron 0.88 Aluminum 0.35 Nylon 0.17

FULL LOAD RUNNING Torque of Motors in Lb.-In.
HP	3450 RPM	1750 RPM	1150 RPM	870 RPM
1/50	0.365	0.720	1.096	1.448
1/20	0.913	1.800	2.739	3.621
1/12	1.521	3.000	4.563	6.032
1/8	2.283	4.500	6.848	9.051
1/6	3.044	6.000	9.148	12.09
1/4	4.565	9.000	13.70	18.10
1/3	6.081	12.00	18.24	24.11
1/2	9.130	18.00	27.39	36.21
3/4	13.70	27.00	41.09	54.31
1	18.26	36.00	54.78	72.41
1-1/2	27.39	54.00	82.17	108.60
2	36.52	72.00	109.56	144.80
3	54.78	108.00	164.30	217.20
5	91.30	180.00	273.96	362.00
7-1/2	137.00	270.00	410.80	543.10

INERTIA TO CONVERT FROM TO MULTIPLY BY g-cm$2$ lb.-in.$2$ 3.417 x 10$-4$ g-cm$2$ lb.-ft.$2$ 2.373 x 10$-6$ kg-cm$2$ lb.-in.$2$ 3.417 x 10$-1$ kg-cm-sec$2$ lb.-in.$2$ 335.1 N-m-sec$2$ lb.-in.$2$ 3417 kg-m$2$ lb.-in.$2$ 3417 N-m$2$ lb.-in.$2$ 348.47 lb.-in.$2$ kg-cm$2$ 2.926 lb.-in.$2$ kg-m$2$ 2.9265 x 10$-4$ lb.-in.$2$ N-m$2$ 2.870 x 10$-3$ lb.-in.$2$ lb.-in.-sec$2$ 2.590 x 10-3 lb.-in.$2$ lb.-ft.$2$ 6.944 x 10-3 lb.-in.$2$ oz.-in.$2$ 16 lb.-ft.$2$ lb.-in.$2$ 144 lb.-ft.$2$ oz.-in.$2$ 2304 lb.-ft.$2$ oz.-in.-sec$2$ 5.969 oz.-in.$2$ oz.-in.-sec$2$ 2.590 x 10-3 oz.-in.$2$ lb.-in.$2$ 6.25 x 10-2 oz.-in.-sec$2$ oz.-in.$2$ 3.8609 x 10-2 oz.-in.-sec$2$ lb.-in.$2$ 24.125

TORQUE TO CONVERT FROM TO MULTIPLY BY kg-m lb.-in. .6026 N-m lb.-in. 8.850 N-m oz.-in. 141.69 lb.-in. g-cm 1152 lb.-in. kg-cm 1.152 lb.-in. kg-m 1.6596 lg.-in. N-m .1130 lb.-in. oz.-in. 16.0 lb.-in. lb.-ft.. .083 lb.-ft. lb.-in. 12.0 MISCELLANEOUS TO CONVERT FROM TO MULTIPLY BY horsepower ft.-lb./min. 33,000 kilograms pounds 2.2 meters millimeters 1000 millimeters inches 3.937 x 10-3 Newtons pounds .225 radians degrees 57.3 revolutions radians 6.283 revolutions/min. degrees/sec. 6 square-inches square-millimeters 645.2 temp. (°C) +17.78 temp. (° F) 1.8 temp. (°F)-32 temp. (° C) 5/9