


Sandvik / Tamrock
550 734 39a Ring, Backing
Rock Drill Spare Part
| Part Number | 550 734 39a |
| Description | Ring, Backing |
| Brand | Sandvik (Tamrock) |
| Assembly | Power Extractor |
| Type | Rock Drill Spare Part |
Quick answer
550 734 39a (also written 55073439a, 550-734-39a, or 550.734.39a) is a Sandvik ring, backing spare part used in the Power Extractor assembly of the Sandvik DT821-SC. Verified compatible with 2 Sandvik machine models including DT821-SC, DT921i. Used in 2 drifter configurations (HLX5, RD525). 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: 55073439a, 550 734 39a, 550-734-39a.
Compatible machines
2
Drifter configurations
2
OEM cross-reference
550 734 39a
About Sandvik 550 734 39a Ring, Backing
This component is part of the Power Extractor assembly in the Sandvik DT821-SC. Maintaining OEM-compatible replacement parts ensures reliable machine performance and minimizes downtime in demanding mining and drilling operations.
This is an OEM-compatible aftermarket replacement part for the Sandvik DT821-SC (DT821-SC). 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
Why use OEM-compatible parts for Sandvik drilling equipment?
OEM-compatible parts are manufactured to the same dimensional tolerances and material specifications as original components, ensuring proper fit, reliable performance, and maintaining the designed safety margins of the drilling machine.


