Sandvik / Tamrock
550 277 73a Bearing bushing
Rock Drill Spare Part
Available — Request Quote| Part Number | 550 277 73a |
| Description | Bearing bushing |
| Brand | Sandvik (Tamrock) |
| Assembly | Flushing Device Assembly |
| Type | Rock Drill Spare Part |
Quick answer
550 277 73a (also written 55027773a or 550-277-73a) is a Sandvik bearing bushing spare part used in the Flushing Device Assembly assembly of the Sandvik DC125R. Verified compatible with 2 Sandvik machine models including COMMANDO DC125R, DC125R. Used in 2 drifter configurations (HEX1, HLX1). 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: 55027773a, 550 277 73a, 550-277-73a.
Compatible machines
2
Drifter configurations
2
OEM cross-reference
550 277 73a
About Sandvik 550 277 73a Bearing bushing
A vital component in the Flushing Device Assembly of the Sandvik DC125R, 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 DC125R (DC125R). 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.