Cushion Connectors

Foremost Cushion Connectors,specifically designed for blast hole drilling, reduce the shock created during the drilling operation and increase the wear life of valuable drill components. The results? Significant cost savings and increased drilling productivity.

Vibrations from the rotary bit are dramatically decreased resulting in increased bit life and drilling footage. By decreasing shock and vibrations, the Foremost Cushion Connector keeps the bit in continuous contact with the formation and helps drillers cut through some of the most difficult drilling conditions including fractured and/or intermittent hard and soft formation. The disc springs incorporated into the unique design of the Cushion Connector allow controlled axial movement between the drill stem and the rotary drive to absorb the drilling shock. This internal movement within the connector housing provides optimum cushion stroke over large operation ranges. The down pressure applied by the disc springs helps to keep the drill bit in constant contact with the formation which will reduce the risk of breaking or fracturing the carbides in the bit. Torsional shock and vibration encountered during the drilling operation are decreased by means of polyurethane materials located between the drive lugs of the internal stem and the external housing. The drive blocks are an effective means of transferring torque from the rotary drive to the drill stem without any loss of H.P., providing 100% transfer of torque to the drill stem components when removing the rotary bit and other members of the drill string. Available for both mid-range and large blast hole drill applications, Foremost manufacture four individual Cushion Connector models to handle various operating loads ranging from 8,000 to 120,000lbs.