Industrial Carbon Brush with Copper Connection Wire
Industrial Component (Electrical Motor Carbon Brush) · None (Copper and Carbon Composition)
Purity: Non-gold; primarily carbon/graphite with copper wire
Type
Industrial Component (Electrical Motor Carbon Brush)
Purity
Non-gold; primarily carbon/graphite with copper wire
Gold Type
None (Copper and Carbon Composition)
Weight
2-5 grams
Description
This is an industrial electrical component known as a carbon brush. It consists of a rectangular block of conductive carbon/graphite attached to a flexible copper shunt wire. These items are frequently mistaken for gold bars by laypeople due to the warm reflection of the copper wire and the metallic sheen of the carbon, but they contain no precious metal.
Key Features
Rectangular carbon block; braided copper wire tail; friction-worn contact surface
Color & Finish
Matte black/grey carbon block with metallic reddish-orange copper wire; surface shows mechanical friction wear
Hallmarks & Stamps
None visible; potentially part numbers on the alternate side of the carbon block
Dimensions Estimate
15mm x 8mm x 5mm carbon block; 10mm wire lead
Gemstones & Inlays
None
Clasp & Closure
Frayed copper shunt/lead wire for electrical terminal connection
Chain & Links
Braided copper wire shunt
Craftsmanship Details
Machine-pressed carbon powder; crimped or tamped copper wire connection for electrical conductivity
Authentication Indicators
Red flag: lacks precious metal hallmarks; carbon block is brittle and leaves black residue; copper wire has a distinct orange hue inconsistent with gold
Origin & Maker
Unknown industrial manufacturer (e.g., Bosch, Makita, or generic aftermarket)
Era & Period
Modern industrial / Mechanical era
Age Estimate
Likely manufactured within the last 5-10 years; shows usage wear
Cultural Significance
Represents the backbone of modern power tools and household appliances
Condition Notes
Fair; the copper wire is frayed/cut and the carbon block shows significant edge wear from friction against a motor commutator
Value Estimate
Zero to negligible; scrap value of copper is minimal at this weight
Care & Maintenance
Not applicable for jewelry or investment; industrial scrap
Similar Items
Copper-coated welding rods, small graphite ingots, or used fuse components
Interesting Facts
Carbon brushes are essential in DC motors and generators, acting as the sliding contact that transfers electricity to the rotating parts.