The slew ring's internal clearance, or bearing play, significantly impacts an excavator's digging performance by affecting its stability, precision, and overall structural integrity. The slew ring, also known as a swing bearing, is a large circular bearing that connects the excavator's upper structure (cab and boom) to the undercarriage, allowing the upper structure to rotate. The internal clearance refers to the amount of free space or movement between the rolling elements (balls or rollers) and the raceways within the bearing. Ideally, the slew ring should have a small amount of internal clearance to allow for proper lubrication and prevent excessive fri....
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