Sandvik / Tamrock
855 207 09 O-RING
Rock Drill Spare Part
| Part Number | 855 207 09 |
| Description | O-RING |
| Brand | Sandvik (Tamrock) |
| Assembly | ROTATION MOTOR, ASSEMBLY KIT |
| Type | Rock Drill Spare Part |
Compatibility
Drifter Models
Machine Models
Quick answer
855 207 09 (also written 85520709, 855-207-09, or 855.207.09) is a Sandvik o-ring spare part used in the ROTATION MOTOR, ASSEMBLY KIT assembly of the Sandvik DD320-40. Verified compatible with 29 Sandvik machine models including AXERA 6-240, AXERA 7-240, AXERA 8-290. Used in 9 drifter configurations (HE300, HFX5, HFX5T). 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: 85520709, 855 207 09, 855-207-09.
Compatible machines
29
Drifter configurations
9
OEM cross-reference
855 207 09
About Sandvik 855 207 09 O-RING
A precision-molded sealing element for the Sandvik DD320-40, this O-ring is used in the ROTATION MOTOR, ASSEMBLY KIT 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 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.
