Carbon Brushes Mahle

Mahle carbon brushes – wear part for DC electric motors

Carbon brushes for Mahle electric motors – from the brand history of Iskra via Letrika to Mahle – are the central wear part in the commutator area of the DC motor. They transfer current from the stationary brush holder to the rotating commutator and are subject to defined mechanical and electrical wear in the process. At SULEJ Ladebordwand you will find carbon brushes in matching geometries and material grades as a maintenance spare part for Mahle drives on mobile hydraulic power packs.

Material and geometry: carbon-copper compound for stable current transfer

Carbon brushes in the Mahle range are typically made of a carbon-copper compound, the exact composition of which is matched to current density, commutator material and operating duration. The copper content reduces contact resistance and improves current-carrying capacity, while the carbon content ensures running and lubrication properties on the commutator. The brush pair is supplied with a braided copper pigtail, a defined seat for the contact spring and a geometry that fits the specific brush holder of the Mahle motor. Shape, cross-section and pigtail length depend on the version – the correct combination is the prerequisite for low-spark operation.

Replacement routine and signs of an upcoming brush change

Carbon brushes are a deliberately planned wear part with a finite service life. Audible changes in running noise, weak starting, irregular speed or visible sparking at the commutator indicate that a change is due. During maintenance both brushes are replaced as a pair, the commutator surface is cleaned and the brush chamber is freed from carbon dust. Important for selection: original geometry, correct pigtail length and matching brush holder version of the specific Mahle motor variant.

Benefits at a glance

• Directly suited to the brush holder geometry of Mahle electric motors
• Carbon-copper compound for stable current transfer at the commutator
• Plannable wear part – enables defined maintenance intervals
• Pair-wise replacement ensures even brush pressure and smooth running

Carbon brushes replaced in good time extend the service life of the Mahle motor and protect the commutator and winding from consequential damage.