Sandvik / Tamrock
550 474 77 BUSHING
DD320-40
| Part Number | 550 474 77 |
| Description | BUSHING |
| Brand | Sandvik (Tamrock) |
| Assembly | CYLINDER |
| Type | Drill Rig Spare Part |
Quick answer
550 474 77 (also written 55047477, 550-474-77, or 550.474.77) is a Sandvik bushing spare part used in the CYLINDER assembly of the Sandvik DD320-40. Verified compatible with 11 Sandvik machine models including AXERA 6-240, DD320-40, DD421-60. 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: 55047477, 550 474 77, 550-474-77.
Compatible machines
11
OEM cross-reference
550 474 77
About Sandvik 550 474 77 BUSHING
Engineered for the demanding conditions of the Sandvik DD320-40, this bushing provides essential support and alignment for rotating shafts and moving components within the CYLINDER. Manufactured to OEM specifications, it ensures precise fit and optimal load distribution throughout its operational life.
This is an OEM-compatible aftermarket replacement part for the Sandvik DD320-40 (DD320-40). 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.
