Sandvik / Tamrock
858 550 79a Seal, Shaft
Rock Drill Spare Part
Available — Request Quote| Part Number | 858 550 79a |
| Description | Seal, Shaft |
| Brand | Sandvik (Tamrock) |
| Assembly | Rock Drill, Hydraulic |
| Type | Rock Drill Spare Part |
Quick answer
858 550 79a (also written 85855079a or 858-550-79a) is a Sandvik seal, shaft spare part used in the Rock Drill, Hydraulic assembly of the Sandvik DS411-C. Verified compatible with 2 Sandvik machine models including DS411, DS411-C. Used in 1 drifter configuration (HE300). 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: 85855079a, 858 550 79a, 858-550-79a.
Compatible machines
2
Drifter configurations
1
OEM cross-reference
858 550 79a
About Sandvik 858 550 79a Seal, Shaft
Critical for maintaining system pressure integrity in the Sandvik DS411-C, this seal is part of the Rock Drill, Hydraulic 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.
