Two-layer (twin-brush) carbon brush holder

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Carbon Brush Holders

Two-layer (twin-brush) carbon brush holder

Two-layer (twin-brush) carbon brush holder — each box carries two stacked brushes on the commutator/slip ring, doubling brush contact area and current capacity for high-current DC motors, slip-ring motors, generators and plating brush gear. Verify brush size, brush count and spring per SKU.

Application	Two-layer (twin-brush) carbon brush holder — each box carries two stacked brushes on the commutator/slip ring, doubling brush contact area and current capacity without enlarging the brush box: high-current DC motors, slip-ring/wound-rotor motors, gene
Connection	Brush seats in the box; two brush layers stacked per box; each brush spring-loaded (constant-force spring typical);

Compatible Models

High-current DC motors (Z4-class and equivalents — double/twin brush gear) Slip-ring / wound-rotor AC motors (collector-ring multi-brush gear) Generators & exciter slip-ring systems (high current density duty) Electroplating / rectifier high-current brush gear

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Technical Specifications

Two-Layer (Twin-Brush) Carbon Brush Holder — Family
Specification	Value
Product Type	Two-layer (twin-brush) carbon brush holder
Brush Arrangement	Two stacked brushes per box (double layer)
Material	Copper / brass / bronze boxes + steel/stainless springs (typical) — confirm
Brush Size	Per SKU — confirm (market ref: 12.5 × 32 × 50 mm, 400 A double-box)
Spring	Independent per brush; coil/torsion/constant-force per SKU
Applications	High-current DC motors; slip-ring motors; generators/exciters; plating rectifier brush gear
Key Feature	Doubles brush contact area & current capacity per box

* Family-level listing based on double-box / twin-brush holder market data. Verify brush size, brush count, spring and current rating per SKU.

Compatible Models

This Two-layer (twin-brush) carbon brush holder 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

Overview

Two-layer (twin-brush) carbon brush holder — a high-current brush holder where each box carries two stacked brushes on the commutator or slip ring. Doubling the brush contact area in the same brush-box footprint raises current capacity and helps balance current sharing — used where single-brush boxes cannot carry the required current.Alibaba.com

Construction

Copper / brass / bronze brush boxes (typical)
Two brush layers per box
Independent spring loading per brush (constant-force spring typical)
Terminals for circuit connection
Insulating mounting

Why Two Layers

Doubles brush contact area without enlarging the box
Higher current capacity (market example: double-box holder rated 400 A)
Multi-contact brush gear for slip-ring / collector-ring duty (2- and 4-brush arrangements in market)