Expanding Shaft

Engineered around the operating needs of surface and underground drilling equipment, the Expanding Shaft (OEM 3125 3071 80) is an aftermarket component for the rotation and drive train. The part provides a defined fastening or locating function, supporting secure assembly and controlled clearance at the joint.

For fleet maintenance, it offers a practical replacement route where dependable fit, serviceability and cost control are important. Accurate dimensions and durable load-bearing surfaces help the joint resist vibration, repeated movement and loss of alignment in heavy drilling service. Typical listed applications include BOLTEC 235 and BOLTEC 235H, subject to machine specification and configuration verification.

This component forms part of Delkom’s alternative spare-parts program for professional drilling machinery. For current stock, commercial terms and technical cross-checking, quote Delkom part number 120 400 351 with OEM reference 3125 3071 80.