LLC Instrument
Our factory specializes, basically, on release of technical, clock and instrument stones. Such as pyroceram, corund foot bearings, ruby, ceramic bushings, and also corund nozzle and another.

Watch superimposed flat stone.ТУ 25-1895.0016-91

Черчеж Фото. Вид под микроскопом.

It composes part of a bearing of regulating wheel finder in chuck of a stone with hole.
The chucks provide flexible shock-resistance of watch mechanism.
Material: Ruby-5

Stone
typesize
D mm Н mm
nominal tolerance nominal tolerance
НП 0825 0,8 -0,010 0,25 -0,030
НП 1030 1,0 -0,010 0,30 -0,030
НП 1230 1,2 -0,010 0,30 -0,030
НП 1240 1,2 -0,010 0,40 -0,060
НП 1640 1,6 -0,010 0,40 -0,060
НП 1645 1,6 -0,010 0,45 -0,060
НП 2050 2,0 -0,014 0,50 -0,060
НП 3080 3,0 -0,014 0,80 -0,060