
Sandvik / Tamrock
550 606 78b Motor, Three Phase
DD321-40
| Part Number | 550 606 78b |
| Description | Motor, Three Phase |
| Brand | Sandvik (Tamrock) |
| Assembly | Electric Module |
| Type | Drill Rig Spare Part |
Quick answer
550 606 78b (also written 55060678b, 550-606-78b, or 550.606.78b) is a Sandvik motor, three phase spare part used in the Electric Module assembly of the Sandvik DD321-40. Verified compatible with 3 Sandvik machine models including DD321-40, DS411-C, DS421. 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: 55060678b, 550 606 78b, 550-606-78b.
Compatible machines
3
OEM cross-reference
550 606 78b
About Sandvik 550 606 78b Motor, Three Phase
This motor is a primary drive component in the Sandvik DD321-40, powering elements within the Electric Module. Whether hydraulic or electric, motor performance directly impacts drilling speed, torque output, and overall machine productivity in mining applications.
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.








