Super Precision Bearings & Aerospace Rolling Bearings

 

 

These bearings are characterised by increased operation safety and reliability as well as by low internal friction in the bearing.  Production of these bearings is separated from other series production and is governed by special technical, production and inspection regulations.

Increased operating safety of bearings or a low friction moment is achieved by appropriate selection of material which is treated in metallurgical works to higher quality, by extent of its inspections, introduction of special checking operations into the production process, determination of higher technical parameters than those determined by tolerance class of the bearing, by modification of the bearing internal design and the design of the bearing arrangement.

 

The bearings are manufactured of once melted (VIM) or double melted (VIM-VAR) bearing steel 100Cr6, AISI 52100. Some of bearings of "PLC" type and the "TPFK" bearings are manufactured of once melt or double melt speed steel 19802, M50 or stainless steel 17042, 440C.  Bearings are manufactured according to a special drawing documentation. They should correspond to ISO 492 or to other technical requirements agreed upon with the customers in the form of technical terms. Depending on the character of the arrangement, the bearings are manufactured in the tolerance classes P6, P5, P4 and higher. Safety degree of bearings is designated as C7, C8, C9 according to the STN 02 4608. They are manufactured only with a reduced vibration level.

 

Prevailing portion of bearings with increased operating safety is intended for the arrangement of the main rotors, rotary parts of reducers, driving boxes, starting-up units, auxiliary power units, high-pressure hydraulic pumps, hydro-generators, turbo cooling units for air conditioning systems, for instruments, and for arrangements of gyroscopes for the following producers of aircrafts and helicopters:  Bearings from this production are also intended for the arrangement of the main rotors of turbo-blowers in road, railway and ship transport, for transmission gearing's in helicopters, for electric motors for actuating mechanisms in nuclear power plants, etc.