Sandvik / Tamrock
550 535 85 Seal
DD321-40
| Part Number | 550 535 85 |
| Description | Seal |
| Brand | Sandvik (Tamrock) |
| Assembly | Slip Ring Unit |
| Type | Drill Rig Spare Part |
Quick answer
550 535 85 (also written 55053585, 550-535-85, or 550.535.85) is a Sandvik seal spare part used in the Slip Ring Unit assembly of the Sandvik DD321-40. Verified compatible with 9 Sandvik machine models including DD321-40, DD321-40C, DD421-60C. 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: 55053585, 550 535 85, 550-535-85.
Compatible machines
9
OEM cross-reference
550 535 85
About Sandvik 550 535 85 Seal
Designed specifically for the Sandvik DD321-40 Slip Ring Unit, this seal ensures leak-free operation of hydraulic circuits. Mining environments expose seals to extreme temperatures, pressure spikes, and abrasive particles, making periodic replacement essential for uninterrupted drilling operations.
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.
