Sandvik / Tamrock
550 645 26a Usit-seal
Rock Drill Spare Part
| Part Number | 550 645 26a |
| Description | Usit-seal |
| Brand | Sandvik (Tamrock) |
| Assembly | Frame Assembly |
| Type | Rock Drill Spare Part |
Quick answer
550 645 26a (also written 55064526a, 550-645-26a, or 550.645.26a) is a Sandvik usit-seal spare part used in the Frame Assembly assembly of the Sandvik DX700. Verified compatible with 12 Sandvik machine models including DD320S, DD321-40, DD321-40C. Used in 5 drifter configurations (HE300, HL300, HL300S). 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: 55064526a, 550 645 26a, 550-645-26a.
Compatible machines
12
Drifter configurations
5
OEM cross-reference
550 645 26a
About Sandvik 550 645 26a Usit-seal
Critical for maintaining system pressure integrity in the Sandvik DX700, this seal is part of the Frame 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 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
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.
