
Sandvik / Tamrock
551 644 14b Assembly
DD321-40
| Part Number | 551 644 14b |
| Description | Assembly |
| Brand | Sandvik (Tamrock) |
| Assembly | Steering Unit |
| Type | Drill Rig Spare Part |
Quick answer
551 644 14b (also written 55164414b, 551-644-14b, or 551.644.14b) is a Sandvik assembly spare part used in the Steering Unit assembly of the Sandvik DD321-40. Verified compatible with 19 Sandvik machine models including DD320S, 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: 55164414b, 551 644 14b, 551-644-14b.
Compatible machines
19
OEM cross-reference
551 644 14b
About Sandvik 551 644 14b Assembly
This component is part of the Steering Unit 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.








