Pistons
With more than 40 years production experience, “Drouzhba” Co. offers highest quality products at reasonable prices.
Ability to achieve diameter ranging from 40 to 150 mm.
Mono-constructions, including annular heat regulation with Ni-resist
or composite ring carriers; alloys preparation under appropriate conditions
and instant spectral control; casting, accomplished in semiautomatic
foundries made by “Fata” – Italy, by using hand-stilts or the recently
developed method of semi-liquid stamping, which provides higher quality
of the crystallized metal’s structure and greatly improved physical,
mechanical and performing qualities of the pistons. Ability to cast
pistons with ring carriers and piston gallery for diesel engines.
All particular and plain surface requirements are achieved by using
distinctive machines and precise CNC equipment, which guarantee adequate
features.
Ability to deposit surface coating by means of graphite, phosphate,
anode and tin.
Tin coating
3÷5 µm 
Phosphate coating
1÷4 µm.
Hard anodizing 40÷80 µm.
Graphite coating 8÷20 µm.
