Sandvik / Tamrock
550 930 78 Seal, Shaft
DS411-C
| Part Number | 550 930 78 |
| Description | Seal, Shaft |
| Brand | Sandvik (Tamrock) |
| Assembly | Bearing Assembly |
| Type | Drill Rig Spare Part |
Quick answer
550 930 78 (also written 55093078, 550-930-78, or 550.930.78) is a Sandvik seal, shaft spare part used in the Bearing Assembly assembly of the Sandvik DS411-C. Verified compatible with 4 Sandvik machine models including DS411-C, DS421, DS421-C. 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: 55093078, 550 930 78, 550-930-78.
Compatible machines
4
OEM cross-reference
550 930 78
About Sandvik 550 930 78 Seal, Shaft
Critical for maintaining system pressure integrity in the Sandvik DS411-C, this seal is part of the Bearing Assembly and provides a reliable barrier against fluid loss and external contamination. Regular seal replacement is a cost-effective maintenance practice that prevents major hydraulic system failures.
This is an OEM-compatible aftermarket replacement part for the Sandvik DS411-C (DS411-C). 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
What happens when a hydraulic seal fails?
A failed hydraulic seal causes fluid leakage, leading to reduced system pressure, loss of machine force and speed, increased oil consumption, environmental contamination, and potential damage to pumps and valves operating without adequate fluid supply.
How can I identify worn seals in my drilling equipment?
Signs of seal wear include visible fluid leaks around cylinders and connections, reduced hydraulic system pressure, slower machine movements, increased oil consumption, and contaminated hydraulic fluid appearing milky or discolored.
