


Sandvik / Tamrock
551 707 91 Bracket, Valve
DD321-40
| Part Number | 551 707 91 |
| Description | Bracket, Valve |
| Brand | Sandvik (Tamrock) |
| Assembly | Valve Assembly |
| Type | Drill Rig Spare Part |
Quick answer
551 707 91 (also written 55170791, 551-707-91, or 551.707.91) is a Sandvik bracket, valve spare part used in the Valve Assembly assembly of the Sandvik DD321-40. Verified compatible with 4 Sandvik machine models including DD321-40, DD321-40C, DD421-60C. 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: 55170791, 551 707 91, 551-707-91.
Compatible machines
4
OEM cross-reference
551 707 91
About Sandvik 551 707 91 Bracket, Valve
This valve controls fluid flow and pressure within the hydraulic or pneumatic system of the Sandvik DD321-40. Part of the Valve Assembly, it ensures precise regulation of drilling parameters including feed force, percussion frequency, and rotation speed.
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.









