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Catalogue MMA Roundline Cylinders

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Roundline C MMA Series

Catalogue HY07-1210/UK

Theoretical Push and Pull Forces

Calculation of Cylinder Diameter

Given that the load and operating pressure of the system are known, and that a piston rod size has been estimated taking account of whether the rod is in tension (pull) or compression (push), then the cylinder bore can be selected.

If the piston rod is in compression, use the 'Push Force' table below.

1. Identify the operating pressure closest to that required.

2. In the same column, identify the force required to move the load (always rounding up).

3. In the same row, look along to the cylinder bore required.

If the cylinder envelope dimensions are too large for your application increase the operating pressure, if possible, and repeat the exercise.

If the piston rod is in tension, use the 'Deduction for Pull Force' table. The procedure is the same but, due to the reduced piston surface area resulting from the piston rod, the force available on the 'pull' stroke will be smaller.

To determine the pull force:

1. Follow the procedure for 'Push' applications, as described above.

2. Using the 'Deduction for Pull Force' table below, establish the force indicated according to the rod diameter and pressure selected.

3. Deduct this from the original 'Push' force. The resulting figure is the net force available to move the load.

If this force is not large enough, go through the process again but increase the system operating pressure or cylinder diameter if possible. If in doubt, our design engineers will be pleased to assist.

Deduction for Pull Force

Push Force


	Bore 0	Cylinder Bore Area
	mm	mm²
	50	1964
	63	3117
	80	5026
	100	7854
	125	12272
	140	15386
	160	20106
	180	25434
	200	31416
	250	49087
	320	80425


Cylinder Push Force in kN at various Pressures
50 Bar	100 Bar	150 Bar	200 Bar	250 Bar
10	20	30	40	50
15	31	46	63	79
25	51	76	102	128
40	80	120	160	200
62	125	187	250	312
77	154	231	308	385
102	205	307	410	512
127	254	381	508	635
160	320	480	640	801
250	500	750	1000	1250
410	820	1230	1640	2050


	Piston Rod 0	Piston Rod Area
	mm	mm²
	32	804
	36	1018
	40	1257
	45	1590
	50	1964
	56	2463
	63	3386
	70	3848
	80	5027
	90	6362
	100	7855
	110	9503
	125	12274
	140	15394
	160	20109
	180	25447
	200	31420
	220	38013

Reduction in Force in kN due to Area of Piston Rod at Various Pressures


50 Bar	100 Bar	150 Bar	200 Bar	250 Bar
4	8	12	16	20
5	10	15	20	25
6	12	19	24	31
8	16	24	32	40
10	19	29	38	49
12	25	37	50	62
17	34	51	68	85
19	39	58	78	98
25	50	76	100	126
32	64	97	129	162
39	79	118	158	196
48	96	145	193	242
61	123	184	246	307
78	156	235	313	392
100	201	301	402	503
129	259	389	518	648
157	314	471	628	785
198	387	581	775	969

inPHorm

For more comprehensive information on the calculation of cylinder bore size required, please refer to the European cylinder inPHorm selection program (1260-Eur).

Parker Hannifin pic

Cylinder Division Europe