550 663 21 Union, Silicon

DP800

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Part Number	550 663 21
Description	Union, Silicon
Brand	Sandvik (Tamrock)
Assembly	Mounting
Type	Drill Rig Spare Part

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550 663 21 (also written 55066321 or 550-663-21) is a Sandvik union, silicon spare part used in the Mounting assembly of the Sandvik DX700. Verified compatible with 35 Sandvik machine models including DC550, DD321-40, DD321-40C. 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.

Compatible machines

OEM cross-reference

550 663 21

About Sandvik 550 663 21 Union, Silicon

An essential element of the Mounting in the Sandvik DX700, 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 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 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.