Block cylinder S is hydraulically double-acting and universally applicable for all linear movements with high force requirements. According to Roemheld, the cylinder can withstand high mechanical and thermal loads, and is suitable for operating pressures up to 500 bar and operating temperatures up to 200°C. Versions up to 250°C are also available on request.
The block cylinder S shows its strengths where high loads and side loads are to be expected, such as on punching, pressing, trimming, bending and stamping machines, as well as in joining and press-in devices. All designs are equipped with piston and rod guide rings, which absorb side loads between the moving components. The rod guide rings also prevent direct metal contact between the piston and cylinder housing, minimising mechanical wear. Importantly, the operating pressure of block cylinder S must be limited to 250 bar for these applications because of very high loads during punching.
Thanks to numerous variants and small dimensions, block cylinder S can also be used for a range of other applications, such as operating core pullers and sliders in mould tools. The cylinder can also be deployed in fully automatic production systems with short cycle times thanks to its high load capacity. Inductive stroke end controls are provided for optional position monitoring.
Five sizes with piston diameters from 32 to 80 mm, and four stroke lengths from 25 to 100 mm, are available. If required, the standard stroke can be shortened by 5 to 29 mm by means of a shrink-fit distance bushing. Piston variants with internal or external thread can be supplied.
Five different sealing systems are offered depending on the application conditions. By combining various sealing materials, the sealing system can be optimally adapted to the respective operating pressure, temperature and hydraulic fluid. This concept ensures that the piston moves constantly and smoothly, even at low speeds, without any stick-slip effect.
To meet high mechanical and thermal requirements, the threaded bushing, cylinder housing and internal piston stops of the block cylinder S have been reinforced. The rod seals minimise leakage to ensure clean operation, while the newly designed dirt wiper prevents the penetration of coarse dirt or swarf.
Block cylinder S can be fixed in various ways. For this purpose, bore holes are available on the broad side, the rod side and the bottom side. There is also a whole range of different connecting options for hydraulics by means of pipe or flange, all with generously dimensioned diameters for high flow rates.
The selection of the correct model variant is facilitated by a series of clear diagrams which show customers the respective load limits for all possible operating conditions. At a glance, the admissible side loads as a function of the piston stroke, the permitted piston speeds in relation to the fixed mass, and the appropriate seal combinations for the respective application, can be seen.