the "als" consists of a fully enclosed housing unit with a rugged axial and radial bearing arrangement and long-term lubrication (low-maintenance). the housing is surface-treated and can be converted into a swivelling ver......the "als" consists of a fully enclosed housing unit with a rugged axial and radial bearing arrangement and long-term lubrication (low-maintenance). the housing is surface-treated and can be converted into a swivelling version by means of 2 pins. the standard version has a self-locking trapezoidal screw with a travelling nut and a drive shaft for mounting a suitable gear motor. the "alsr" version consists of the "als" standard version plus a fully enclosed shaft and piston structure, with the tubes protected against corrosion. countless motor options are possible using a choice of mounting flanges or bell housings and couplings. a ball screw with various nut assemblies can also be used instead of the trapezoidal screw. to complete the product, there is a wide range of accessories such as stroke limiting devices, anti-turn devices and a choice of head types.