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Carbon Brushes

CM9T Metal Graphite Carbon Brush

Part No. CM9T

Morgan CM9T copper-graphite (metal graphite) carbon brush for DC motors up to 60 V and AC-motor slip rings/collector rings. Resistivity 0.8 µΩ·m, rated 14 A/cm², contact drop 0.4 V, max peripheral speed 30 m/s; supplied to size per drawing with copper-braid lead.

Material	Morgan CM9T grade
Dimensions	- 12.5 × 32 × 40 mm - 12.5 × 32 × 50 mm - 25 × 32 × 50 mm / 25 × 32 × 60 mm - 32 × 40 × 66 mm (liste
Application	CM9T metal-graphite brush for: - DC motors of 60 V or less (low-voltage traction/auxiliary, electrolysis and plating equipment class) - Slip rings (collector rings) of AC motors and motors — wound-rotor / slip-ring brush gear - **Turbogenerator b
Voltage	DC motors of **60 V or less
Current Density	14 A/cm²
Speed	Maximum permissible peripheral speed 30 m/s
Hardness	Shore 22 (per gkzhan CM9T parameter table)
Grade	Morgan CM9T — metal graphite

Compatible Models

CM9T (copper graphite Morgan grade) — per gkzhan parameter table CM family cross-references: CM9 (standard copper-carbon) CM3T CM5T CM3H CM1S CM5H

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Technical Specifications

Specification	Value
Grade	Morgan CM9T (metal graphite / copper graphite)
Material	Metal graphite (copper graphite) — high-copper variant of CM9
Resistivity	0.8 µΩ·m (i.e. 80 µΩ·cm, per gkzhan CM9T parameter table)
Flexural Strength	38 MPa (per gkzhan table)
Hardness	Shore 22 (per gkzhan table)
Density	3.1 g/cm³ (per gkzhan table)
Contact Voltage Drop	0.4 V (per gkzhan table)
Friction Coefficient	0.08 (per gkzhan table)
Current Density	14 A/cm² (per gkzhan table)
Max Peripheral Speed	30 m/s (per gkzhan table)
Sizes	12.5 x 32 x 40 mm; 12.5 x 32 x 50 mm; 25 x 32 x 50/60 mm; 32 x 40 x 66 mm; custom per drawing
Voltage	Not rated; supplier application note — DC motors of 60 V or less
Lead Type	Flexible copper braid with terminal (per drawing)
Spring	Not included (brush-holder supplied)
Family Cross-References	CM9 (standard), CM3T, CM5T, CM3H, CM1S, CM5H, CM5B, SM3
Application	DC motors ≤ 60 V; AC motor slip rings / collector rings; turbogenerator brush positions; industrial DC/AC motors

Compatible Models

This CM9T Metal Graphite Carbon Brush is designed as a direct replacement for the following machine models and series:

CM9T (copper graphite Morgan grade) — per gkzhan parameter table CM family cross-references: CM9 (standard copper-carbon) CM3T CM5T CM3H CM1S CM5H CM5B SM3 (verify application fit) Low-voltage DC motors ≤ 60 V using 12.5 × 32 × 40 / 12.5 × 32 × 50 / 25 × 32 × 50 blocks — verify per machine AC motor slip rings / collector rings with 25 × 32 × 60 or 32 × 40 × 66 mm brushes — verify per machine Turbogenerator brush positions (25 × 32 × 60 mm class) — verify per machine

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Description

This CM9T carbon brush is a Morgan metal-graphite (copper graphite) grade — the high-copper variant of the CM9 family — used on low-voltage DC motors (60 V or less) and on slip rings / collector rings of AC motors, as well as turbogenerator brush positions. Compared with standard CM9, the higher copper content lowers resistivity to 0.8 µΩ·m and contact drop to 0.4 V, raises rated current density to 14 A/cm² and reduces friction to 0.08, giving cooler, more stable current transfer on low-voltage commutators and slip rings; the permissible peripheral speed is 30 m/s and Shore hardness 22 per the gkzhan parameter table. The brush is manufactured to your required size — 12.5 × 32 × 40, 12.5 × 32 × 50, 25 × 32 × 50/60 mm, 32 × 40 × 66 mm or custom per drawing — with flexible copper-braid lead and terminal, ready for installation in the corresponding brush holder.

Features & benefits:

Morgan CM9T copper-graphite — high-copper variant, low resistivity 0.8 µΩ·m
Low-voltage DC proven — motors of 60 V or less
Slip-ring proven — AC motor collector rings and wound-rotor slip rings
Low contact drop 0.4 V, low friction 0.08, rated 14 A/cm²
Max peripheral speed 30 m/s; Shore hardness 22
Custom to your drawing — sizes, lead length and terminal per specification
Quality-inspected before dispatch: dimensional check, lead crimp integrity, and surface condition per batch