


Sandvik / Tamrock
551 740 77b Marking label set
DD321-40
| Part Number | 551 740 77b |
| Description | Marking label set |
| Brand | Sandvik (Tamrock) |
| Assembly | CONTROL ASSEMBLY |
| Type | Drill Rig Spare Part |
Quick answer
551 740 77b (also written 55174077b, 551-740-77b, or 551.740.77b) is a Sandvik marking label set spare part used in the CONTROL ASSEMBLY assembly of the Sandvik DD321-40. Verified compatible with 2 Sandvik machine models including DD321-40, DD321-40C. 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: 55174077b, 551 740 77b, 551-740-77b.
Compatible machines
2
OEM cross-reference
551 740 77b
About Sandvik 551 740 77b Marking label set
This component is part of the CONTROL ASSEMBLY assembly in the Sandvik DD321-40. 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 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
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.







