Sandvik / Tamrock
551 587 66 Seal, Rod
Rock Drill Spare Part
Available — Request Quote| Part Number | 551 587 66 |
| Description | Seal, Rod |
| Brand | Sandvik (Tamrock) |
| Assembly | PERCUSSION MECHANISM |
| Type | Rock Drill Spare Part |
Quick answer
551 587 66 (also written 55158766 or 551-587-66) is a Sandvik seal, rod spare part used in the PERCUSSION MECHANISM assembly of the Sandvik DD321-40. Verified compatible with 14 Sandvik machine models including DD321-40, DD321-40C, DD421-60. Used in 1 drifter configuration (RD525). 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: 55158766, 551 587 66, 551-587-66.
Compatible machines
14
Drifter configurations
1
OEM cross-reference
551 587 66
About Sandvik 551 587 66 Seal, Rod
Critical for maintaining system pressure integrity in the Sandvik DD321-40, this seal is part of the PERCUSSION MECHANISM 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 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
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.
