Sandvik / Tamrock
550 212 74a Bushing
DC122R
| Part Number | 550 212 74a |
| Description | Bushing |
| Brand | Sandvik (Tamrock) |
| Assembly | Retainer |
| Type | Drill Rig Spare Part |
Quick answer
550 212 74a (also written 55021274a, 550-212-74a, or 550.212.74a) is a Sandvik bushing spare part used in the Retainer assembly of the Sandvik DC122R. Verified compatible with 4 Sandvik machine models including Commando DC130Ri, DC120, DC122R. 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: 55021274a, 550 212 74a, 550-212-74a.
Compatible machines
4
OEM cross-reference
550 212 74a
About Sandvik 550 212 74a Bushing
This precision-machined bushing is a critical wear component in the Sandvik DC122R drilling system. Bushings reduce friction between rotating and stationary parts, significantly extending the service life of the entire Retainer assembly. Regular inspection and timely replacement of worn bushings prevents costly damage to mating components and reduces unplanned downtime in mining operations.
This is an OEM-compatible aftermarket replacement part for the Sandvik DC122R (DC122R). 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.
