Sandvik / Tamrock
856 811 29a O-ring
Rock Drill Spare Part
Available — Request Quote| Part Number | 856 811 29a |
| Description | O-ring |
| Brand | Sandvik (Tamrock) |
| Assembly | Rock drill |
| Type | Rock Drill Spare Part |
Compatibility
Drifter Models
Machine Models
Quick answer
856 811 29a (also written 85681129a or 856-811-29a) is a Sandvik o-ring spare part used in the Rock drill assembly of the Sandvik DX700. Verified compatible with 16 Sandvik machine models including DL310-7, DL311-7, DL321-7. Used in 13 drifter configurations (HF800T, HF810T, HF820T). 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: 85681129a, 856 811 29a, 856-811-29a.
Compatible machines
16
Drifter configurations
13
OEM cross-reference
856 811 29a
About Sandvik 856 811 29a O-ring
A precision-molded sealing element for the Sandvik DX700, this O-ring is used in the Rock drill 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 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
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.
