Key seat Wiper

 滑套式鍵槽擴大器由芯軸和滑套兩部分組成，滑套由兩半合圓組焊在芯軸上，可以在芯軸上上下活動和轉動。在滑套上堆焊三組三條螺旋形硬質合金棱?；咨隙擞幸粚︿忼X形牙嵌，與上接頭下端的鋸齒牙嵌相配。當滑套卡入鍵槽后，加壓正轉時可以產生向下的震擊作用使滑套解卡?；紫虏康囊粚︿忼X形牙嵌與下接頭上端面的牙嵌相配，可以在鍵槽處施加一定拉力進行倒劃眼，以破壞鍵槽。

Key seats develop during the drilling process whenever deviation or major changes in direction occur. Use MZS Key seat Wiper in these conditions will save you from costly fishing jobs and downtime. The key seat reaming tool is a sleeve with five blades dressed with an aggressive tungsten carbide hardfacing.