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Both the jib cylinder and the luffing cylinder are hydraulic actuators used in aerial work platforms, but they control different boom motions. The jib cylinder actuates the jib linkage for local articulation and positioning, while the luffing cylinder changes the main boom elevation angle to raise or lower the boom. Their mounting geometry, required force, stroke, load conditions, and operating characteristics differ, so the two cylinders are engineered for different functions rather than treated as interchangeable actuators. At Newstar, we specialize in the R&D and manufacturing of hydraulic cylinders, servo cylinders, and various non-standard equipment. Our products are widely used in…

Modern factory automation involves much more than simply moving parts in straight lines. Many machines must also pivot a fixture, tip a platform, index a part, or turn a joint. These jobs need circular motion instead of basic back-and-forth travel. In these applications, a rotary actuator can be an effective solution when controlled torque and rotary motion are required. At Newstar, we build hydraulic cylinders, servo cylinders, and rotary actuators. We also make custom equipment for tough motion-control needs. Our products are used in building machinery, lift platforms, ships, mines, and planes. For designers and buyers, it is key to…

A hydraulic jack may fail to lift, lose load-holding pressure, develop external leakage, move slowly, or fail to lower properly. These symptoms can originate from the hydraulic circuit, including low fluid level, air or aeration, pump or valve malfunction, internal leakage, seal failure, or mechanical problems within the cylinder and mounting system. Low fluid level can also allow air to enter the suction circuit, resulting in aeration, noise and inconsistent actuator movement. If pressure cannot be maintained under a steady load, the system may have internal leakage, valve leakage, insufficient pump performance, or an incorrectly adjusted relief valve. These may…