BOLT, SPECIAL

552 000 22 BOLT, SPECIAL This special bolt is engineered to secure major components together under extreme vibration and load. It provides the essential clamping force, or preload, that keeps critical joints from shifting or separating during operation. You will typically find these bolts in high-stress locations like the drifter body, holding the main sections together, or mounting the rotation unit to the feed beam.

Using the correct genuine bolt is fundamental for both safety and reliability. A failing or incorrect bolt can lead to catastrophic structural failure, creating a serious hazard underground. Proper tension from this fastener also ensures that the drifter transmits its full impact energy to the rock. If a key joint like this loosens, you will notice a drop in penetration rate and may cause secondary damage to other expensive parts.

Always inspect these critical bolts for any signs of loosening, corrosion, or cracking during routine maintenance. An oil weep from a joint is often the first sign of a loose fastener. Due to material stretching and fatigue, these bolts should not be reused after being removed during a major repair. Always tighten to the specified torque using a calibrated tool to ensure the rig's safety and integrity.