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Knight Hawk Supply
Your One-Stop Hydraulic Source
Hydraulic Cylinders, Pneumatic Cylinders, Cylinder Repair Parts, Seals, Seal Kits

Selecting the Proper Size Cylinder

Determine The Force Required -- To select a cylinder for an application, first determine the maximum push and/or pull force required to do the job. Then use the pressure table to select the cylinder that gives the necessary force for your application. It should be noted that the force requirements derived by formula are only theoretically correct. Other factors must be provided for.

Pressure drop -- which means that working pressure at the cylinder port will be somewhat less than system pressure -- should be allowed for in such calculations. A margin for overcoming friction in the cylinder likewise must be added. After selecting the proper size cylinder for the job use envelope and mounting dimension charts to determine cylinder dimensions.

Pressure Ratings

Hydraulic Working Pressure PSI

Fluid
Required
Per Inch
of Stroke

CYL. BORE DIA.	HEAVY- DUTY SERVICE	4:1 SAFETY FACTOR †	PISTON ROD DIA.	CYL. WORK ACTION	WORK AREA SQ. IN.	350	500	750	1000	1500	2000	3000	GAL.	CU. FT.
1 1/2	3000	3972	5/8 1	Push Pull Pull	1.767 1.460 .982	618 511 344	883 730 491	1325 1095 736	1767 1460 982	2651 2190 1473	3534 2920 1964	5301 4380 2946	.00765 .00632 .00425	.00102 .00084 .00057
2	3000	3080	1 1 3/8	Push Pull Pull	3.141 2.356 1.656	1099 825 580	1571 1178 828	2356 1767 1242	3141 2356 1656	4711 3534 2484	6283 4712 3312	9423 7068 4968	.01360 .01020 .00717	.00182 .00136 .00096
2 1/2	3000	3225	1 3/8 1 3/4	Push Pull Pull Pull	4.909 4.124 3.424 2.504	1718 1443 1198 876	2454 2062 1712 1252	3682 3093 2568 1878	4909 4124 3424 2504	7363 6186 5136 3756	9818 8248 6848 5008	14727 12372 10272 7512	.02125 .01785 .01482 .01084	.00284 .00239 .00198 .00145
3 1/4	3000	2544	1 3/8 1 3/4 2	Push Pull Pull Pull	8.296 6.811 5.891 5.154	2904 2384 2062 1804	4148 3405 2945 2577	6222 5108 4418 3865	8296 6811 5891 5154	12444 10216 8836 7731	16592 13622 11782 10308	24888 20433 17673 15462	.0359 .0295 .0255 .0223	.00480 .00394 .00341 .00298
4	2700	2100	1 3/4 2 2 1/2	Push Pull Pull Pull	12.566 10.161 9.424 7.657	4398 3556 3298 2680	6283 5080 4712 3828	9425 7621 7068 5743	12566 10161 9424 7657	18849 15241 14136 11485	25132 20322 18848 15314	37698 30483 28272 22971	.0544 .0440 .0408 .0331	.00727 .00588 .00545 .00443
5	3000	2516	2 2 1/2 3 3 1/2	Push Pull Pull Pull Pull	19.635 16.492 14.726 12.566 10.014	6872 5772 5154 4398 3505	9818 8246 7363 6283 5007	14726 12369 11044 9424 7510	19635 16492 14726 12566 10014	29453 24738 22089 18849 15021	39270 32984 29452 25132 20028	58905 49476 44178 37698 30042	.0850 .0714 .0637 .0544 .0433	.01136 .00954 .00852 .00728 .00580
6	2700	2126	2 1/2 3 3 1/2 4	Push Pull Pull Pull Pull	28.274 23.365 21.205 18.653 15.708	9896 8178 7422 6528 5498	14137 11682 10602 9326 7854	21205 17524 15904 13990 11781	28274 23365 21205 18653 15708	42411 35047 31807 27979 23562	56548 46730 42410 37306 31416	84822 70095 63615 55959 47124	.1224 .1011 .0918 .0808 .0680	.01636 .01352 .01227 .01079 .00909
7	3000	2376	3 3 1/2 4 4 1/2 5	Push Pull Pull Pull Pull Pull	38.485 31.416 28.864 25.915 22.585 18.850	13470 10996 10102 9070 7905 6598	19242 15708 14432 12957 11292 9425	28864 23562 21648 19436 16939 14137	38485 31416 28864 25915 22585 18850	57728 47124 43296 38872 33877 28275	76970 62632 57728 51830 45170 37700	115455 94248 86592 77745 67755 56550	.1666 .1360 .1250 .1122 .0977 .0816	.02227 .01818 .01670 .01500 .01307 .01091
8	3000	2100	3 1/2 4 4 1/2 5 5 1/2	Push Pull Pull Pull Pull Pull	50.265 40.644 37.699 34.365 30.630 26.507	17593 14225 13195 12028 10720 9277	25133 20322 18850 17182 15315 13253	37699 30483 28274 25773 22973 19880	50265 40644 37699 34365 30630 26507	75398 60966 56548 51548 45945 39760	100530 81288 75398 68730 61260 53014	150795 121932 113097 103095 91890 79521	.2176 .1759 .1632 .1488 .1326 .1147	.02909 .02352 .02182 .01989 .01772 .01534
10	3000	2993	4 1/2 5 5 1/2 7	Push Pull Pull Pull Pull	78.540 62.636 58.905 54.782 40.055	27489 21923 20617 19174 14019	39270 31318 29453 27391 20027	58905 46977 44179 41086 30041	78540 62636 58905 54782 40055	117810 93954 88357 82173 60082	157080 125272 117810 109564 80110	235620 187908 176715 164346 120165	.3400 .2712 .2549 .2372 .1740	.04545 .03625 .03408 .03170 .02319
12	3000	2801	5 1/2 7 8 8 1/2	Push Pull Pull Pull Pull	113.100 89.339 74.613 62.830 56.352	39585 31269 26117 21990 19723	56550 44670 37310 31415 28176	84825 67005 55965 47122 42264	113100 89340 74620 62830 56352	169650 134010 111930 94245 84528	226200 178680 149240 125660 112704	339300 268020 223860 188490 169056	.4896 .3868 .3230 .2719 .2441	.06545 .05170 .04333 .03636 .03259
Call, Fax or Email Knight Hawk Supply for price and delivery on Cylinders of all types

Knight Hawk Supply
89 Zips Road
Hawk Point, MO 63349
(636) 338-4031 Fax (636) 338-4434
Toll Free (877) 739-3200
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Knight Hawk Supply Your One-Stop Hydraulic Source Hydraulic Cylinders, Pneumatic Cylinders, Cylinder Repair Parts, Seals, Seal Kits

Knight Hawk Supply
Your One-Stop Hydraulic Source
Hydraulic Cylinders, Pneumatic Cylinders, Cylinder Repair Parts, Seals, Seal Kits