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Double acting pneumatic cylinders

rodless, series OSP-P

The rodless cylinders of the OSP-P series are particularly useful where there is no space for a standard cylinder. The piston rod does not extend from the cylinder. Thanks to their maximum stroke of up to 6 meters, they can also be used in applications where the use of a conventional cylinder would be impossible. This series uses the proven two-strip principle. The cylinders are equipped with a magnetic piston as standard for contactless position sensing. The air connection is standardly from the side of the cover and can be turned to any side.

Technical information

Technical data

Working pressure	0,6 MPa
Min. pressure	0,35 MPa
Max. pressure	0,8 MPa
Temperature range	-10^oC to +80^oC
Working medium	modified compressed air

Piston diameter [mm]	25	32	40	50	63	80
Force at 0,6 MPa [N]	250	420	640	1000	1550	2600
Connection	G1/8"	G1/4"	G1/4"	G1/4"	G3/8"	G1/2"
Length of adjustable cushioning [mm]	17	20	27	30	32	39
Max. stroke [mm]	6000	6000	6000	6000	6000	6000
Carriage speed [m.s^-1]	standard: 0,2 to 3, low speed lubrication: 0,005 to 0,2
Weight 0 mm stroke [kg]	0,65	1,44	1,95	3,53	6,41	12,46
Weight of 100 mm stroke [kg]	0,197	0,354	0,415	0,566	0,925	1,262

Construction / materials

end caps: aluminium, painted
body: drawn aluminium tube, anodized
carrier (piston): aluminium, anodized
sealing strips: stainless steel
seals: NBR (optional Viton®)
screws: steel, galvanized (optional stainless steel)
scraper covers: plastic

Permissible load

Examination and selection of cushioning

In a system with dynamic masses as for example with the rodless cylinder, it is essential to control the dissipation of the kinetic energy during braking until standstill. The first thing to be done is to select cushioning. Two kinds are available: 1. internal cushioning and 2. external cushioning. It is of special significance that the carriage with load does not hit the end cap at high speed

If the point corresponding to a given load and speed lies beneath the appropriate curve, the cushioning is able to absorb the kinetic energy of the system. Vice versa if the point lies above the curve, the cushioning is not able to absorb the kinetic energy, in which case you must:
a) reduce load and keep the speed the same
b) decrease the speed and maintain the load
c) select a larger cylinder
d) use shock absorbers as an external damping.
Cushioning capacity is shown in the diagrams on the right (in respect to final speed, when carriages get close to end caps).

**Allowable values of static load of cylinders**
Piston diameter	F [N]	P1 [N]	M1 [Nm]	M2 [Nm]	M3 [Nm]
25	250	300	15	1,5	3
32	420	450	30	3	5
40	640	750	60	6	8
50	1000	1200	115	10	15
63	1550	1650	200	12	24
80	2600	2400	360	24	48

Allowable values of dynamic load of cylinders

How to find allowable value at dynamic load:

take coefficient value from table according to the speed
allowable values of static load multiple by Kd value and we will get max. allowable value for dynamic load

Speed [m/s]	0,1	0,2	0,3	0,6	0,9	1,2	1,5	1,8	2,1	2,4	2,7	3,0
Coefficient	1,00	0,90	0,67	0,45	0,33	0,24	0,18	0,14	0,11	0,08	0,07	0,06

Loading the middle support

To prevent strong deflection and vibrations of the cylinder tube, middle supports are required from a certain length. The diagram shows the possible maximum buckling widths depending on the load. The permissible deformation is a max. 0.5 mm deflection between the supports.

Buckling lengths for cylinders diameters 25 and 32 mm:

Buckling lengths for cylinders diameters 40 to 80 mm: