Specification -
 

FYH First started operation for the production of pillow blocks for the Japanese market in the year 1953.Since the FYH has kept a recognized position as a national top manufacturer using special production techniques for pillow block applications.

FYH has accumulated a great deal of experience over the years and has developed an Automatic line production for individual self aligning structure bearings. leading us to control and fabricate very high quality of bearings including specially designed ceramic bearings.

In contrast to today's commercially available bearings FYH products surface finishing is beyond what is prescribed by Japanese IndustrialBearing Standards. FYH products are designed and produced to fully cope with severe operational conditions where high speed and heavy loads are required. FYH produces nearly 700 types of bearings and over 300 different types of housings. This range makes FYH as one of the leading producer of pillow blocks in the world.

Besides standard production series produced by the most of the leading manufacturers of the world FYH also produces small right weight unit (so called clean series), stainless steel series and Ceramic series of bearing units.

The Ceramic bearings (Si3N4) series which are internationally thought as new generation of bearings has also been developed by our R&D dept, starting from the idea that ceramics can effectively substitute the steel balls running on the bearings. Their main feature if durability which is substantially improved, where as adhesion between ball and race can be prevented by the combination of different kind of materials of steel and ceramic, also termed as hybrid bearings. Furthermore the bearings maintenance is free even under aggressive environmental conditions.

The goal of is to continue R&D activities, in order to fabricate pillow blocks which can keep working with no maintenance even under ultimate environments such as in the ocean and/or the space technology.
 
 
Procedures of selection of ordinary ball bearing units
 

Procedures of selection

Items to be examined

Operating conditions to be considered

Reference

1 Selection of model

•  Pillow type
•  Flange type
•  Take-up type
•  Cartridge type
•  Hanger type

Structure of machinery, mounting
space, mounting dimensions

2 Models (P.6)

2 Selection of shaft dia. and dia. series

•  Bearing bore dia.:
    From 8 to 140 mm
•  Dia. series : 0, 2, X, 3

Rating life of bearings required, load
applied to bearings, rotating speed

4    Rating life of bearings (P.19)
5    Bearing load (P.22)
6    Allowable rotating speed (P.29)

3 Selection against atmosphere

•  L3 type
•  Cover type
•  Clean series
•  Stainless steel series
•  Ceramic series
•  For high speed use
•  For blower

Environment (dusts, mud water,
moisture, chemicals), rotating speed

2 Models (P.6) (P. 14)
6 Allowable rotating speed (P.29)

4 Selection against temperature

•  Heat resistant type
•  Cold resistant type
•  Ceraball series
•  Measures against expansion
   and contraction of shaft
•  Grease supply

Bearing temperature

2 Models (P.6) (P. 14)
7 Operating temperature and bearing
   specifications (P.30)
9 Design of shaft and base (P.36)
14 Handlings (P.52)

5 Selection of installing to shaft

•  Set screw Adapter
•  Eccentric locking collar

Rotating speed, load conditions,
handling

2 Models (P.6)
14 Handlings (P.52)

6 Selection of shafts

•  Dimensional tolerance
■   Adoption of shouldered     shaft
•  Provision of set screw for    shaft
•  Measures against expansion
   and contraction of shaft

Rotating speed, load conditions,
bearing temperature

2 Models (P.6) (P. 14)
6 Allowable rotating speed (P.29)
9 Design of shaft and base (P.36)
14 Handlings (P.52)

7 Selection of strength of housings

•  Cast iron
•  Cast steel
•  Steel plate

Load conditions, load directions,
presence of impact

8 Strength of housings (P.31)

8 Selection of lubricant

•  Lubricating type
•  Non-lubricating type
•  Centralized lubricating type
•  Greasing interval

Environment, importance of machine,
bearing temperature, grease life

14 Handlings (P.52)

9 Selection of maintenance
and check

•  Periodic inspection
•  Grease supply

Environment, importance of machine,
bearing temperature, grease life

14 Handlings (P.52)
 
Installation
Installation of setscrew units Tightening of set screws
Tightening locknut Bending claw of washer (Locking locknut)
Ball bearing units with eccentric locking collar Installing eccentric locking collar
Packing grease in internal space of seal lip of covers Installing steel plate covers