Sandvik / Tamrock
550 727 99 O-Ring
DS411-C
Available — Request Quote| Part Number | 550 727 99 |
| Description | O-Ring |
| Brand | Sandvik (Tamrock) |
| Assembly | Limiter, Spool Stroke |
| Type | Drill Rig Spare Part |
Quick answer
550 727 99 (also written 55072799 or 550-727-99) is a Sandvik o-ring spare part used in the Limiter, Spool Stroke assembly of the Sandvik DS411-C. Verified compatible with 3 Sandvik machine models including DS411, DS411-C, DT820-SC. 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: 55072799, 550 727 99, 550-727-99.
Compatible machines
3
OEM cross-reference
550 727 99
About Sandvik 550 727 99 O-Ring
A precision-molded sealing element for the Sandvik DS411-C, this O-ring is used in the Limiter, Spool Stroke to create a reliable static or dynamic seal. Even minor O-ring deterioration can lead to system pressure loss, so scheduled replacement during routine maintenance is strongly recommended.
This is an OEM-compatible aftermarket replacement part for the Sandvik DS411-C (DS411-C). 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.
