Carbon brushes and commutators for railway traction machines
Railway machines see duty cycles that few industrial motors match: repeated acceleration under full load, regenerative and rheostatic braking, constant vibration and wide temperature swings. Traction motors, auxiliary machines, alternators and coach equipment all depend on brushes and, on DC machines, on commutators in good condition.
We manufacture DC commutators from hard-drawn silver-bearing electrolytic copper with mica insulation, heat-seasoned and mirror-turned, together with carbon brushes in matched grades and brush holders that maintain pressure under vibration. Parts are built to the sample or drawing supplied, in the sizes and terminal styles the existing brush gear takes.
Where our parts are used in railways
- 01
Traction motor commutators
Hard-drawn silver-bearing copper segments in steel V-ring construction, heat-seasoned and mirror-turned.
- 02
Traction and auxiliary machine brushes
Electro-graphite and metal-graphite brushes with twin leads and secure terminals.
- 03
Alternators and coach equipment
Brushes and holders made to sample for auxiliary generating sets.
- 04
Brush rocker and holder assemblies
Brass and plated holders with spring systems sized to hold pressure under vibration.
What these parts have to survive
- Repeated high-current acceleration and braking cycles stress commutation heavily
- Continuous vibration and shock loosen terminations and cause brush bounce
- Wide ambient temperature range across seasons and regions
- Long service intervals mean parts must hold their form for the full period between overhauls
Made to your sample
Send the worn part or a dimensioned drawing and we manufacture a replacement to the same sizes — no re-machining at your end. Manufacturing in Bulandshahr, Uttar Pradesh since 1995.
Products we supply to railways
Railways — common questions
Do you manufacture traction motor commutators to drawing?
Yes. Supply the drawing or the existing commutator and we manufacture to those dimensions — segment count, diameter, length, V-ring construction and riser detail — using hard-drawn electrolytic copper and mica insulation.
Which brush grades suit railway traction duty?
Traction machines generally use electro-graphite grades chosen for their commutating ability under heavy current. Because grade selection depends on the specific machine, we match what is already running successfully in your equipment rather than substituting.
Can brushes be supplied with twin leads and specific terminals?
Yes. Single or twin flexible braided copper leads with fork, spade, slotted or ring terminals are all made to your sample or specification.