Sandvik 55057798 Rotation Bushing (550 577 98) — Drifter Spare Part for HLX5, RDX5, DD310, DD320 & Axera 6

The Sandvik 55057798 Rotation Bushing — also known by its formatted part number 550 577 98 or 550-577-98 — is a critical drifter spare part used in Sandvik hydraulic rock drills and underground jumbo drilling rigs. This part is used in drifter and hydraulic rock drilling machines, and is confirmed compatible with the HLX5 and RDX5 rock drills and drifters, as well as the DD320-40, DD310-40, and Axera 6 underground drill rig models.

Positioned within the rotation mechanism of the drifter assembly, the rotation bushing serves as a precision-fit bearing interface that supports the rotational motion of the drill steel chuck. In high-cycle drilling operations, this component is subject to constant torsional load, vibration, and abrasive debris — conditions that demand exactly the right material hardness, dimensional accuracy, and surface finish to perform reliably over an extended service life. Using a correctly specified, OEM-matched rotation bushing is essential to protecting the drifter’s internal geometry and maintaining drilling accuracy over time.

The RDX5 rock drill is a robust successor to the established HLX5, and the two are interchangeable across all applications where they are used. This means the Sandvik 55057798 Rotation Bushing serves both generations of Sandvik’s most widely deployed underground rock drill platform — making it a high-demand, high-turnover spare part across a broad installed base of equipment worldwide.

Key Features

• OEM Part Number: 55057798 — also searchable as 550 577 98 or 550-577-98, all referring to the same component
• Drifter / Rock Drill Application: Specifically engineered for use within the rotation assembly of Sandvik hydraulic rock drills
• Confirmed Equipment Compatibility: HLX5 Rock Drill · RDX5 Rock Drill · DD310-40 · DD320-40 · Axera 6 Underground Jumbo Drill Rig
• Precision-Fit Construction: Manufactured to tight tolerances to ensure accurate rotation, reduced lateral play, and consistent chuck alignment during drilling
• Wear & Friction Reduction: Acts as a sacrificial wear interface that protects higher-cost drifter components such as the chuck body and rotation motor housing
• High-Cycle Durability: Built to withstand the continuous torsional loading, percussion vibration, and flushing water exposure typical of underground face drilling and rock bolting operations
• Direct Replacement: Drop-in fit for the original factory-installed bushing — no modifications required
• Returnable Part: Classified as a returnable component through authorised Sandvik parts channels

Specifications

Compatible Equipment Overview

The DD310 and DD320 are Sandvik’s widely used single and twin-boom underground face drilling jumbos, deployed across tunneling, mining development, and production drilling globally. Both models are equipped with the HLX5 drifter as the standard rock drill unit — making rotation bushing replacement a routine, high-frequency maintenance task across this equipment family. The newer RDX5 rock drill, designed as a direct drop-in successor to the HLX5, shares the same interfacing components, ensuring the 55057798 bushing serves both generations of Sandvik’s core underground drilling platform.

Order the Sandvik 55057798 Rotation Bushing today and keep your drifter assembly running with the precision and reliability your operation demands.