
Sandvik / Tamrock
551 877 54a Valve Assembly
DL421-7C
| Part Number | 551 877 54a |
| Description | Valve Assembly |
| Brand | Sandvik (Tamrock) |
| Assembly | Cylinder feed assembly |
| Type | Drill Rig Spare Part |
Quick answer
551 877 54a (also written 55187754a, 551-877-54a, or 551.877.54a) is a Sandvik valve assembly spare part used in the Cylinder feed assembly assembly of the Sandvik DL421-7C. Verified compatible with 2 Sandvik machine models including DL311-7, DL421-7C. 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: 55187754a, 551 877 54a, 551-877-54a.
Compatible machines
2
OEM cross-reference
551 877 54a
About Sandvik 551 877 54a Valve Assembly
This valve controls fluid flow and pressure within the hydraulic or pneumatic system of the Sandvik DL421-7C. Part of the Cylinder feed 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 DL421-7C (DL421-7C). 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.


