Sandvik / Tamrock
550 577 98b Bushing, Rotation
Rock Drill Spare Part
| Part Number | 550 577 98b |
| Description | Bushing, Rotation |
| Brand | Sandvik (Tamrock) |
| Assembly | Rock Drill |
| Type | Rock Drill Spare Part |
Quick answer
550 577 98b (also written 55057798b, 550-577-98b, or 550.577.98b) is a Sandvik bushing, rotation spare part used in the Rock Drill assembly of the Sandvik DD321-40. Verified compatible with 5 Sandvik machine models including DD320S, DD321-40, DD321-40C. Used in 1 drifter configuration (HLX5). Available as an aftermarket replacement drill part from BK Drilling — Turkey-based Sandvik and Epiroc spare parts supplier serving mining contractors worldwide. Quote on request via WhatsApp; typical lead time 3-7 days for stock items.
Part code alternate forms: 55057798b, 550 577 98b, 550-577-98b.
Compatible machines
5
Drifter configurations
1
OEM cross-reference
550 577 98b
Reference image
Available
About Sandvik 550 577 98b Bushing, Rotation
A vital component in the Rock Drill of the Sandvik DD321-40, this bushing acts as a sacrificial wear element designed to protect more expensive surrounding components. Its precise dimensional tolerances ensure smooth operation and minimal vibration during drilling operations.
This is an OEM-compatible aftermarket replacement part for the Sandvik DD321-40 (DD321-40). Also compatible with Tamrock branded equipment of the same model series. BK Drilling supplies this part with fast worldwide shipping and competitive pricing.
Frequently asked questions
What does a bushing do in a drilling machine?
A bushing acts as a wear-resistant liner that reduces friction between moving and stationary parts. It protects more expensive components from direct contact wear, extends service intervals, and maintains precise alignment of rotating elements in drilling equipment.
How often should bushings be replaced?
Bushing replacement intervals depend on operating conditions, but typical mining applications require inspection every 500-1000 operating hours. Signs of wear include increased play or vibration, unusual noise, and visible scoring or deformation of the bushing surface.
