CLEVIS

136 259 08 CLEVIS Acting as a crucial pivot point, this CLEVIS connects a hydraulic cylinder rod to a moving part of the drill rig's positioning system. You will typically find it at the end of a boom or feed cylinder, where it allows for the angular movement necessary to position the drifter accurately for drilling. Its job is to transfer immense pushing and pulling forces reliably.

The integrity of this connection is directly tied to both operational safety and drilling performance. Wear in the CLEVIS pin hole can cause unwanted play in the entire boom structure, leading to inaccurate collaring and increased stress on other pins and bushings. A sudden failure of a worn or cracked CLEVIS could result in an uncontrolled drop of the feed or boom, creating a serious hazard.

During routine inspections, check the CLEVIS for any signs of cracking, especially around the pin bore. Also, look for elongation or an 'oval' shape in the hole, which indicates significant wear. If you notice excessive slop or hear clunking sounds from the linkage during operation, this component should be inspected immediately.