Champion Spawn Artifacts lists the new drops for champions

From UOGuide

A component of more complex devices. Despite what the name and appearance implies, only one gear is required to assemble it.

Crafting

Skill required:
0.0 Tinkering

Components:

• 1 Axle
• 1 Gears

Items That Require Axles with Gears

• Clock Parts
• Sextant Parts