Suitable for operating pressures up to 500 bar and temperatures up to 200°C (optionally 250°C), a new range of compact hydraulic cylinders with block-type body and high load capacity has been introduced by Hitchin-based Roemheld UK Ltd (
www.roemheld.co.uk).
Designed for use in punching and forming applications, the new Block Cylinder S (strong) units are a further
development of the manufacturer’s proven cylinder range.
Hydraulically double-acting, they can be used for linear movements with demanding force requirements, as they can withstand high loads — including side loads, which are absorbed by the piston and rod guide rings (these also prevent direct metal contact between piston and cylinder housing, minimising mechanical wear).
Applications are typically to be found in press-working applications, such as on punching, trimming, bending and stamping machines.
They can also be used with joining and insertion equipment, as well as for mould slide actuation and core pulling. Inductive stroke-end controls are an option for position monitoring.
Five piston diameters from 32 to 80mm and four stroke lengths from 25 to 100mm are available (the stroke can be shortened by 5-29mm by means of a shrink-fit bushing).
Piston variants with an internal or external thread can also be supplied, and five sealing systems are available (depending on the application conditions).
By combining different materials, the sealing can be optimally adapted to the operating pressure, temperature and hydraulic fluid; and to meet high mechanical and thermal requirements, the threaded bushing, cylinder housing and internal piston stops have been reinforced.
The units can be mounted in a variety of ways, and there are numerous options for connecting the hydraulics.
Selection of the appropriate model is facilitated by a series of diagrams showing the load limits for all operating conditions.
The admissible side load for the piston stroke, the permitted piston speed in relation to the mass and the appropriate seal combinations for the application are stipulated.