


Sandvik / Tamrock
085 407 78b Plate, Backing
DD321-40
| Part Number | 085 407 78b |
| Description | Plate, Backing |
| Brand | Sandvik (Tamrock) |
| Assembly | Flushing Valve Assembly |
| Type | Drill Rig Spare Part |
Quick answer
085 407 78b (also written 08540778b, 085-407-78b, or 085.407.78b) is a Sandvik plate, backing spare part used in the Flushing Valve Assembly assembly of the Sandvik DD321-40. Verified compatible with 6 Sandvik machine models including DD321-40, DD421-60C, DD422i-60C. 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: 08540778b, 085 407 78b, 085-407-78b.
Compatible machines
6
OEM cross-reference
085 407 78b
About Sandvik 085 407 78b Plate, Backing
Part of the Flushing Valve Assembly in the Sandvik DD321-40, this plate provides essential mounting, wear protection, or structural support. Regular inspection for wear, cracking, or deformation helps prevent unexpected equipment failure during 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 use OEM-compatible parts for Sandvik drilling equipment?
OEM-compatible parts are manufactured to the same dimensional tolerances and material specifications as original components, ensuring proper fit, reliable performance, and maintaining the designed safety margins of the drilling machine.







