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Carbon Brushes

CM9 Morgan Carbon Brush 40mm X 25mm

Part No. CM9

Morgan CM9 copper-carbon (metal-graphite) carbon brush, size 40 × 25 mm (W × T) per your specification. Rated 11 A/cm², max peripheral speed 35 m/s; recommended for DC generators/motors ≤ 60 V and AC-motor slip rings. Length, lead and terminal configurable.

Material	Metal graphite
Dimensions	- Width: 40 mm (1.575") — per your specification - Thickness: 25 mm (0.984") — per your specificatio
Application	Morgan CM9 is recommended for DC generators and motors operating at 60 V or less, and for AC-motor slip-ring (collector-ring) positions (per grade datasheet). The grade is also used for grounding / earthing brush devices and general low-voltage industrial
Current Density	11 A/cm²
Speed	Maximum peripheral speed 35 m/s
Hardness	Shore hardness 25
Grade	Morgan CM9

Compatible Models

Morgan grade CM9 (copper-carbon / metal-graphite grade — stock brush custom size) Applications: DC generators & motors ≤ 60 V AC motor slip rings grounding/earthing brush devices Same-family Morgan copper grades (for reference): CM3H CM5H CM5B

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Technical Specifications

Specification	Value
Grade	Morgan CM9
Material	Metal graphite (copper-carbon)
Width	40 mm / 1.575"
Thickness	25 mm / 0.984"
Length	Per drawing (to be specified)
Cross-Section	40 × 25 mm (W × T)
Current Density	11 A/cm² (grade datasheet)
Max Surface Speed	35 m/s (grade datasheet)
Resistivity	3 µΩ·m (grade datasheet)
Flexural Strength	29 MPa (grade datasheet)
Hardness	Shore 25 (grade datasheet)
Density	2.80 g/cm³ (grade datasheet)
Contact Drop	1.16 V (grade datasheet)
Friction Coefficient	0.11 (grade datasheet)
Voltage	Not rated (N/A); application limit 60 V or less
Lead Type	Flexible copper braid with terminal (per drawing)
Spring	Not included (brush-holder supplied)
Application	DC generators/motors ≤60V; AC-motor slip rings; grounding/earthing devices
Compatible Brand	General industrial / OEM DC & AC machines (size-specified)

Compatible Models

This CM9 Morgan Carbon Brush 40mm X 25mm is designed as a direct replacement for the following machine models and series:

Not sure if it fits your machine? Send us your equipment model, motor type or original part number — our engineers will confirm compatibility and advise the correct grade. Ask an engineer →

Description

This Morgan CM9 carbon brush is a metal-graphite (copper-carbon) brush supplied to your specified cross-section of 40 mm × 25 mm. CM9 belongs to Morgan's copper-containing "CM" brush-grade family: the copper-graphite structure gives high conductivity, low contact drop and good commutation, making it a proven choice for DC generators and motors operating at 60 V or less, as well as for AC-motor slip-ring positions and grounding/earthing brush devices. The grade is machined/pressed to your drawing, including length, lead length and terminal style, and is supplied ready for installation in the corresponding brush holder.

Features & benefits:

Morgan CM9 copper-carbon grade — high conductivity, low contact drop (1.16 V), low friction (0.11), rated 11 A/cm².
Custom to your size — 40 × 25 mm cross-section; length, lead and terminal per your drawing.
Low-voltage commutation duty — DC generators/motors ≤ 60 V; AC-motor slip rings; grounding/earthing devices.
Reliable contact — flexible copper-braid shunt with terminal for stable current transfer.
Quality-inspected before dispatch: dimensional check, lead crimp integrity, and surface condition per batch.