Sandvik / Tamrock
550 212 52a O-ring
DD321-40
| Part Number | 550 212 52a |
| Description | O-ring |
| Brand | Sandvik (Tamrock) |
| Assembly | Hydraulic receiver assembly |
| Type | Drill Rig Spare Part |
Quick answer
550 212 52a (also written 55021252a, 550-212-52a, or 550.212.52a) is a Sandvik o-ring spare part used in the Hydraulic receiver assembly assembly of the Sandvik DD321-40. Verified compatible with 4 Sandvik machine models including DD321-40, DD321-40C, DL431-7C. 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: 55021252a, 550 212 52a, 550-212-52a.
Compatible machines
4
OEM cross-reference
550 212 52a
About Sandvik 550 212 52a O-ring
This O-ring provides critical sealing in the hydraulic or pneumatic circuits of the Sandvik DD321-40. Part of the Hydraulic receiver assembly, 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 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
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.
