Sandvik / Tamrock
551 519 78 O-ring
DX700
| Part Number | 551 519 78 |
| Description | O-ring |
| Brand | Sandvik (Tamrock) |
| Assembly | Cylinder assembly |
| Type | Drill Rig Spare Part |
Compatibility
Machine Models
Quick answer
551 519 78 (also written 55151978, 551-519-78, or 551.519.78) is a Sandvik o-ring spare part used in the Cylinder assembly assembly of the Sandvik DX700. Verified compatible with 11 Sandvik machine models including DI550, DL321-7, DL421-15C. 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: 55151978, 551 519 78, 551-519-78.
Compatible machines
11
OEM cross-reference
551 519 78
About Sandvik 551 519 78 O-ring
A precision-molded sealing element for the Sandvik DX700, this O-ring is used in the Cylinder assembly to create a reliable static or dynamic seal. Even minor O-ring deterioration can lead to system pressure loss, so scheduled replacement during routine maintenance is strongly recommended.
This is an OEM-compatible aftermarket replacement part for the Sandvik DX700 (DX700). 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 do O-rings fail in drilling equipment?
O-rings fail due to chemical degradation from hydraulic fluid, extreme temperature cycling, excessive pressure spikes, improper installation (twisting or pinching), and age-related hardening. Using the correct material compound for each application is critical.
