Overview
Brush rockers (also called brush rocker rings) are the brush-rigging yokes of brushed DC machines: the ring mounts the brush holders and can be rotated relative to the commutator to set the correct brush neutral position. They support and position the carbon brushes, compensating for brush wear and vibration to keep stable electrical contact.QY Research
Construction
- Ring/arms in metal alloy, with insulating rings, bushings and connector rings per OEM design
- Carries multiple brush-holder stations around the commutator
- Rotatable mounting on the end shield/bracket with alignment marks for neutral setting
- Provisions for wear switches on traction/forklift designs (e.g., Linde)
Setting & Maintenance
- Align the rocker line mark with the end-shield mark after brush changes (Siemens SIMOTICS DC / Baumüller practice)
- Setting clearance is steplessly adjustable (typically 1.5–2 mm on SIMOTICS DC)
- Incorrect rocker position causes brush sparking and commutator damage — always reset to the line marks
[IMAGE 2 – Detail: alignment marks and brush-holder station]
Fitment
- Siemens SIMOTICS DC (1HS6/1HS7/1HQ7/1GH5), Baumüller GN..N DC motors, Linde forklift traction motors
- Industrial brushed DC motors/generators, wound-rotor machines
- Fitment is per SKU — confirm motor frame, ring diameter, holder-station count and setting marks before ordering
Brush-rocker family listing. Siemens, Baumüller, Linde and other names are trademarks of their respective owners; compatibility references are informational.