Sandvik / Tamrock
550 720 03 O-RING
DD320-40
| Part Number | 550 720 03 |
| Description | O-RING |
| Brand | Sandvik (Tamrock) |
| Assembly | GEARBOX |
| Type | Drill Rig Spare Part |
Quick answer
550 720 03 (also written 55072003, 550-720-03, or 550.720.03) is a Sandvik o-ring spare part used in the GEARBOX assembly of the Sandvik DD320-40. Verified compatible with 1 Sandvik machine model including DD320-40. 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: 55072003, 550 720 03, 550-720-03.
Compatible machines
1
OEM cross-reference
550 720 03
About Sandvik 550 720 03 O-RING
This O-ring provides critical sealing in the hydraulic or pneumatic circuits of the Sandvik DD320-40. Part of the GEARBOX, it prevents fluid leakage at connection points and maintains system pressure integrity essential for efficient drilling operations.
This is an OEM-compatible aftermarket replacement part for the Sandvik DD320-40 (DD320-40). 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
Why do O-rings fail in drilling equipment?
O-rings fail due to chemical degradation from hydraulic fluid, extreme temperature cycling, excessive pressure spikes, improper installation (twisting or pinching), and age-related hardening. Using the correct material compound for each application is critical.
