SPRING, COMPRESSIVE

The SPRING, COMPRESSIVE 551 660 43 (also indicated as 0384500016 and 551-660-43) is a mining-grade compression spring engineered for mechanical and hydraulic subsystems on Sandvik drilling rigs, ROC-series platforms, and underground jumbos. The 551 660 43 SPRING, COMPRESSIVE delivers precise return force, stabilizing valve mechanisms, linkage controls, damping units, and pressure-regulated assemblies under continuous vibration and impact loads.

This 551 660 43 SPRING, COMPRESSIVE is manufactured from hardened spring steel with corrosion-resistant coating, ensuring long-term performance despite exposure to hydraulic oil, rock dust, moisture, and thermal cycling. Its controlled elasticity maintains consistent actuation force, preventing misalignment, sluggish valve movement, or mechanical instability. OEM indicators 0384500016 and 551-660-43 confirm compatibility with factory-fitted Sandvik assemblies.

The 551 660 43 SPRING, COMPRESSIVE maintains mechanical preload in critical systems, ensuring stable valve response, precise linkage positioning, and smooth return action during drilling, feeding, rotation, and auxiliary system operation.

Inspect the 551 660 43 SPRING, COMPRESSIVE for fatigue cracks, loss of tension, uneven deformation, or pitting. Replace 551 660 43 immediately if reduced return force, inconsistent actuation, or vibration-induced wear is detected.