The Shaft Lock (OEM Part No. 3128309116) is a spare part compatible with Boltec 235, Boltec-MC, and Boomer-MD underground drilling rigs. Manufactured from high-strength alloy steel, it is designed as a mechanical component for the shaft assembly position in shaft retaining and locking mechanisms. The shaft lock securely fixes shaft components, prevents unwanted movement, and maintains accurate alignment during equipment operation. Its durable construction provides reliable strength and resistance to mechanical stress in harsh underground mining environments. This OEM replacement shaft lock ensures stable performance and long service life for drilling and bolting equipment.