Brake shoes for underground cars 720.31.31.44.157.1

Brake shoes are used in wheel pairs of railway wagons of passenger and goods trains. The shoe is a friction material moulded in a press mould with a hole for a cheque. Method of manufacture: cold and hot moulding in a mould at a certain pressure and temperature with pressing into a mesh-wire frame. Brinell hardness, NV 16/1875/30 can be presented in the range from 14 to 30 incl. Coefficient of friction on cast iron grade ??-15 can be presented in the range from 0,38 to 0,56. Linear wear on cast iron grade ?? 15, mm, not more than 0,13