DE7000 Carbon Brush Locomotive traction motor

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Carbon Brushes

DE7000 Carbon Brush Locomotive traction motor

Part No. DE7000

DE7000 electrographite carbon brush, Morgan grade for EMD locomotive traction motors (PN 9578681). Outstanding high-speed commutation, low friction coefficient, stable performance under heavy vibration and high load. Ideal replacement for railway diesel locomotive traction motor maintenance, engineered for long service life in heavy haul rail applications. Bulk stock available for railway fleets.

Material	Electrographite (Morgan DE7000 Grade)
Dimensions	15.8mm × 50.8mm × 54mm, twin flexible copper shunt leads with terminal lugs
Application	OEM replacement carbon brush for EMD diesel-electric locomotive DC traction motors, part number 9578681. Designed for railway locomotive traction motors, heavy haul rail, mining traction motors, delivers reliable commutation under heavy shock & vibration
Voltage	DC up to 1000V
Current Density	Up to 15.5 A/cm²
Speed	Max peripheral speed up to 51 m/s
Hardness	Shore Scleroscope 83
Grade	DE7000 Electrographite Grade
Connection	Multi-shunt wire bonded connection
Lead Type	Flexible stranded copper shunt leads with bolt-on terminal lugs
Spring	External separate spring assembly (no built-in spring)

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Technical Specifications

Product Model	DE7000
Material	Electrographite (Morgan DE7000 Grade)
Dimensions	15.8mm × 50.8mm × 54mm, twin copper shunt leads with terminal lugs
Application	EMD diesel-electric locomotive DC traction motors, PN 9578681, heavy haul railway & mining traction motors
Working Voltage	DC up to 1000V
Current Density	Up to 15.5 A/cm²
Max Peripheral Speed	51 m/s
Hardness	Shore Scleroscope 83
Brush Grade	DE7000 Electrographite Grade
Connection Type	Multi-shunt wire bonded connection
Lead Type	Flexible stranded copper shunt leads with bolt-on terminal lugs
Spring	External separate spring assembly, no integrated spring
Equivalent OEM Part	EMD 9578681
Key Features	High speed commutation, low friction, vibration resistant, heavy load capacity, long service life
Quality Standard	Matches Morgan DE7000 grade OEM specification

Description

The DE7000 Carbon Brush is a premium electrographite traction motor carbon brush originally developed by Morgan, widely used as OEM replacement for EMD diesel-electric locomotive traction motors with part number 9578681. This grade is specially formulated for railway heavy-duty DC traction motors, featuring low friction coefficient, low contact voltage drop and excellent commutation performance under high current, high speed and continuous vibration conditions. It maintains stable sliding contact on commutator surfaces, forms a uniform protective patina, minimizes sparking and reduces commutator wear even during frequent load changes of locomotives. Equipped with dual flexible stranded copper shunt leads with terminal lugs, it ensures secure mechanical bonding and consistent high-current transmission. Precision machined to OEM dimensions for direct drop-in replacement. Suitable for heavy haul freight locomotives and mining traction motors. Each batch undergoes strict quality testing for resistivity, hardness and wear rate. Worldwide shipping and bulk supply for railway operators and locomotive maintenance workshops.