Buying knowledge

Component guide

Direct guides for buyers who need to match a machine to real work, inspect it remotely, and prepare it for transport.

Used XCMG rotary drilling rig showing mast, rotary drive and Kelly bar system

Component guide · Sep 1, 2026

Friction vs Interlocking Kelly Bar: What Used Rotary Rig Buyers Should Check

Choose and inspect a friction or interlocking Kelly bar by geology, depth, crowd transfer, wear, compatibility and the real scope of a used-rig quotation.Read guide · 9 min read