


Sandvik / Tamrock
551 817 88a Support
DD321-40
| Part Number | 551 817 88a |
| Description | Support |
| Brand | Sandvik (Tamrock) |
| Assembly | Frame, Backing |
| Type | Drill Rig Spare Part |
Quick answer
551 817 88a (also written 55181788a, 551-817-88a, or 551.817.88a) is a Sandvik support spare part used in the Frame, Backing assembly of the Sandvik DD321-40. Verified compatible with 3 Sandvik machine models including DD321-40, DD321-40C, DT621. 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: 55181788a, 551 817 88a, 551-817-88a.
Compatible machines
3
OEM cross-reference
551 817 88a
About Sandvik 551 817 88a Support
An essential element of the Frame, Backing in the Sandvik DD321-40, this part is designed to meet the exacting standards required for underground and surface drilling equipment. Timely replacement prevents costly cascading failures in critical machine systems.
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.







