The Spring (OEM Part No. 3128230103) is a structural replacement part compatible with multiple Epiroc drilling and bolting rigs. Manufactured from high-strength alloy spring steel, it is designed for use within the drill steel support system, providing stable elastic support and controlled tension performance. This component ensures proper load distribution, vibration absorption, and mechanical return function during drilling operations. It is suitable for equipment models including M2D, T1D, M2C, and Boomer series rigs such as XE3C, 281, 282, 291, and L2D, maintaining reliable structural stability under demanding underground working conditions.