copper graphite carbon brush for collector ring with carbon brush holder

What is a Carbon Brush?

Rotating machines are used for the conversion of mechanical energy into electrical energy or vice versa. All electrical machines whether motors or generators using direct or alternating current, depend for their actions on the principles of electromagnetic induction. Michael Faraday’s fundamental discovery, that a conductor whilst being moved through a magnetic field becomes the seat of electromotive forces (emf) and furthermore the direction of the electromotive forces is at right angles to both the direction of motion and the direction of magnetic field. The carbon brush is the integral part on the transfer of current in the rotating machine and although they differ in size, shape and technical composition carbon brushes and collectors all fulfil the same basic function. This is to transfer current from a moving device to a stationary point or vice versa within an electric circuit. The Carbon Brush is fitted in a brush holder which is designed to hold it in the correct position and allow the brush to run on the surface of the commutator or slip ring (collector) to transfer that currrent at optimum performance.

Brush material grades

Electrographites - Commutation & Collection (Carbon partially transformed into graphite by heating to temperatures in the range 2200°C to 2800°C)

Biggest range of applications

• DC drives, & AC rings, etc.

• Current densities normally in the range 4 to 16Acm-2

• Surface speeds up to 50ms-1

Metal graphites - Mainly collection except for low voltage applications Copper -

• low voltage/collection of high current

• Current densities 12 to 30Acm-2

• Surface speeds up to 30ms-1 Silver -

• low voltage with good signal integrity

• Current densities vary from almost zero to 30Acm-2

• Surface speeds up to 30ms-1

Natural graphites - Collection

• TA exciters with steel sliprings

• Current densities up to 12Acm-2

• Surface speeds up to 80ms-1 Resin bonded - Commutation

• High contact drop (poor commutation) or low current/temperature applications • Current densities up to 8Acm-2

• Surface speeds up to 30ms-1

Metal impregnated - Commutation

• High strength/ high current requirements

• Current densities up to 30A/cm-2

• Surface speeds up to 40ms-1 Hard carbon & carbon graphites - Commutation

• ‘Older applications’ or Difficult commutation

• Current densities up to 10Acm-2

• Surface speeds up to 30ms-1

Power Tool Carbon Brush & Holder

Why Choose IUGIS ?

1. Professional Manufacturer and Advance Technology Application Develop Rapidly in Domestic Market Over 20 Years !

2. Various Carbon Brush,Carbon Brush Holder,Slip Ring,Inductor,Carbon Vane and etc Can be Supplied by Us !

3. International Approved : ISO9001:2001, CE, RoHS, SGS, CCC... Assure High Quality Products !

4. Optional Material Choice: Imported Material, National Material, Alternative Material !

5. Have a Factory in Jiangsu: Accept Customize, Factory Price, Best Service !

6. Discount up to 30% in Maxium in Large Quantities Demands !

IUGIS Supplier:

BOSCH            B&D AEG         DEWALT       HITACHI

MAKITA           KOSOKU          KAISER         POTER CABLE

METABO         JEPSON           KEYANG        MITACHI

RYOBI             MIKASA            SHNIKO         MOULINEX

TALON            TOSHBA           WOLF             MILWAUKEE