HAFNER Pneumatyka
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Pneumatics Hafner Piston cylinders

Pneumatics, Compressors, Dryers, Tanks, Pneumatic installations, Air prepration units, Gauges, Pneumatic tubes, Pneumatic valves, Pneumatic cylinders, Pneumatic fittings.







Use properties of the Hafner’s production cylinders

All of the Hafner’s cylinders characterises very high toughness in the wide temperature ranges and outer conditions. The are produced with the wide range of stokes and in different material versions, which enalble them to fit to different, also very difficult working conditions. They are equipped in a built-in magnet, which enables to control the location of the piston by using the ecectronic sensors.

1. Basic information

Pneumatic cylinders are a group of pneumatic elements, which change the compressed air enegry into the mechanical energy (forcefulness or torque) , they belong to the group of the execution elements. The general classificaton of the pneumatic cylinders is given below:

Klasyfikacja siłowników

2. Pneumatic cylinders usable power calculation:

Usable power on the poiston rod- calculation:

Obliczanie siły

– Power pressure [bar]
D –nominal diameter (Piston’s) [cm]
d – piston rod’s diameter [cm]

Cylinder’s pushing force F1:

F1=Π x D²/4 x p1 [kG]

Cylinder’s pulling force F2:

F2 = Π x (D²-d²)/4 x p1 [kG]

The pusching force of the cylinder with the one side piston rod is bigger, than the pulling force

Usable power on the poiston rod- calculation: double acting two side piston rod

Obliczanie siły

p1 – Power pressure [bar]
D –nominal diameter (Piston’s) [cm]
d – piston rod’s diameter [cm]


The pusching force and the pulling force of the pneumatic cylinder are equal, and counted according to :


F1(F²)=Π x (D²-d²)/4 x p1 [kG]



3. The table of the theoretical force action of the pneumatic cylinders depending on the diameter and pressure

Theoretical pusching force [daN] [kG]
Cylinder’s diameter Air pressure [MPa]
0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0
D12 3,39 4,52 5,65 6,79 7,92 9,05 10,18 11,31
D16 6,03 8,04 10,05 12,06 14,07 16,09 18,10 20,11
D20 9,42 12,56 15,70 18,85 21,99 25,13 28,27 31,42
D25 14,72 19,63 24,54 29,42 34,36 39,27 44,17 49,09
D32 24,12 32,17 40,21 48,25 56,29 64,34 72,38 80,42
D40 37,7 50,2 62,8 75,4 88,0 100,5 113,0 125,7
D50 59,0 78,5 98,0 117 137 157 176 196
D63 93,5 124 155 187 218 249 280 311
D80 150 201 251 301 351 402 452 502
D100 235 314 392 471 549 628 706 785
D125 368 490 613 736 859 981 1104 1227
D160 603 804 1005 1206 1407 1608 1810 2011
D200 942 1257 1571 1885 2199 2513 2827 3142
D250 1473 1963 2454 2945 3436 3927 4418 4909
D320 2492 3322 4153 4984 5814 6645 7476 8306

4. The table of air consumption at full duty cycle of pneumatic cylinders:

The air consumption in the normalized cylinders according to ISO/VDMA given in nominal liters while the power pressure is 6 bar and the stroke 10 mm.

Piston’s diameter
[mm]		 Piston rod’s working motion
[NI]		 Piston rod’s return motion
[NI]
8 0,0033 0,0026
10 0,0055 0,0046
12 0,008 0,006
16 0,014 0,012
20 0,022 0,018
25 0,034 0,029
32 0,060 0,051
40 0,088 0,074
50 0,140 0,115
63 0,221 0,200
80 0,352 0,317
100 0,550 0,515
125 0,859 0,803
160 1,410 1,319
200 2,210 2,111
250 3,436 3,299
320 5,620 5,412

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We have become part of the Rubix Group

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