


Sandvik / Tamrock
550 503 78c Flange
DT821-C
| Part Number | 550 503 78c |
| Description | Flange |
| Brand | Sandvik (Tamrock) |
| Assembly | Power Pack Assembly |
| Type | Drill Rig Spare Part |
Quick answer
550 503 78c (also written 55050378c, 550-503-78c, or 550.503.78c) is a Sandvik flange spare part used in the Power Pack Assembly assembly of the Sandvik DT821-C. Verified compatible with 8 Sandvik machine models including DD421-60, DD421-60C, DT721. 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: 55050378c, 550 503 78c, 550-503-78c.
Compatible machines
8
OEM cross-reference
550 503 78c
About Sandvik 550 503 78c Flange
An essential element of the Power Pack Assembly in the Sandvik DT821-C, this part is designed to meet the exacting standards required for underground and surface drilling equipment. Timely replacement prevents costly cascading failures in critical machine systems.
This is an OEM-compatible aftermarket replacement part for the Sandvik DT821-C (DT821-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 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.






