Carbon Brushes

Listing ID #4371354

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Supply Type Manufacturer, Exporter, Supplier

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A carbon brush is a device for maintaining electrical contact from a static to a rotating part in a motor or generator, a moving surface such as a commutator or a slipring, ensures a spark-free....

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Product Details

A carbon brush is a device for maintaining electrical contact from a static to a rotating part in a motor or generator, a moving surface such as a commutator or a slipring, ensures a spark-free commutation and performs the following critical functions-
•   Deliver or collect electric current from rotating part of a machine
•   Perform the duty of commutation i.e. changing the direction of the flow of current
•   Keep the commutator or slipring surface clean & smooth with a protective film of copper & carbon graphite to maintain good contact without excessive wear.

Carbon brushes have been used for a long period of time and are preferred due to their excellent properties like good electrical & thermal conductivity and high temperature resistance which make it a highly suitable material for current transmission in rotating electrical machines. They are widely used in the automotive industry, iron & steel industry, cement plants, paper mills, domestic appliances, generators & motors of the railways.

A carbon brush can be made of one or more carbon blocks and equipped with one or more shunts / terminals.

Trouble Shooting -

1.   Over time, the abrasion caused by the moving parts will mean that the brushes will need to be replaced.
2.   It's normal for small sparks to appear when the brushes rub against the motor’s armature, but excessive sparking could mean you need new brushes.
3.   Hardness does not have a direct effect on brush life or brush wear. If the commutators are out of round or have high spots, a harder brush will actually have a tendency to bounce more and leave the commutator surface, potentially causing greater problems than before. Light loads, light spring force and poor commutator conditions are the usual causes of rapid brush wear.
4.   Grooving occurs when there is poor electrical contact, resulting in a high resistance at the brush face with the ring or commutator. This may be due to roughness on the surface or vibration.

Company Details

Malabar Carbons Pvt. Ltd. (MCPL) began operations in the year 1986 at its modern plant in Jamshedpur, Jharkhand in East India. Using latest technologies & machinery imported from Germany & United Kingdom, MCPL began manufacturing & supplying high quality carbon brushes, for various applications to Tata Steel. Owing to the superior quality and affordability of our products, MCPL was invited to other Tata units like Tata Motors, Tata Tinplate & ISWP and by the year 2000 we were the main supplier of carbon brushes to all Tata units in East India including the their iron ore mines.
In the year 2001 we were approached by several ACC cement plants across the country and are now meeting the carbon brush requirements of almost all the ACC plants across the country. Today our products are used in leading Iron & Steel Plants, Power Plants, Paper Mills, Boiler Manufacturers, Automobile Plants & Cement Plants across the country & abroad.
Our products are made using indigenous & imported material and are used for the following applications-
Stationery DC & AC Motors in all branches of industry such as coal mines, iron & steel plants, cement plants, paper mills etc.
Slipring Motors
Traction motors and auxiliary machines for locomotives, rail cars & electrically propelled vehicles
FHP motors for domestic appliances & power tools
Automobile starters, dynamo & screen wipers
Power plant exciters, sliprings & generators
Carbon contacts as current collectors for railways, trams, trolleys, buses, overhead cranes & lifts
While selecting the correct product & grade for an application, we study the following factors carefully-
Type of machine
Total current to pass through the brushes
Peripheral speed of the commutator or slipring
Load conditions
Atmospheric conditions
Location of the machine
Design of the machine
Commutation conditions
We exist to-
Develop innovative solutions for complex problems
Supply quality products for every application
Provide world class after sales service
MCPL has endured the test of time with its commitment to supplying high technology products which are regularly updated to suit latest technological advancements. Our plant is equipped with latest instruments like pull strength machine and drop testing machine to carry out quality tests at every stage of production.