Welded body cylinders/welded hydraulic cylinder have no tie rods. The barrel is welded directly to the end caps. The ports are welded to the barrel. The front rod gland is usually threaded into or bolted to the cylinder barrel. That allows the piston rod assembly and the rod seals to be removed for service.
Welded cylinders have a narrower body and often a shorter overall length enabling them to fit better into the tight confines of machinery. Welded hydraulic cylinder do not suffer from failure due to tie rod stretch at high pressures and long strokes. The welded design also lends itself to customization. Special features are easily added to the cylinder body, including special ports, custom mounts, valve manifolds, and so on.
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