Pune Carbon Pvt. Ltd.

Product Range
Hard Carbon Brushes

The Most important raw materials are amorphous carbons like retort coke and petroleum coke, bonded with pitch or resin, the raw materials are pressed and kilned at temperatures above 1000’C.

The kilning process carbonises the binder and a relatively hard carbon is produced with much better polishing qualities than electro graphite grades. Therefore, hard carbon brushes are mostly used on small machines with flush mica which require stronlgy polishing brushes. The permissible electical and thermal load for hard carbon brushes is rather low and their elasticlty limits their use to machines with peripheral speeds of up to 20m/sec.