Bearing 685/672 KOYO

Tapered roller bearings 685/672

Bearing number : 685/672

Size mm : 98.425x168.275x41.275

Brand : KOYO

Bore Diameter mm : 98,425

Outer Diameter mm : 168,275

Width mm : 41,275

Bearing dimensions and specification in brand catalogue :

d - 98,425 mm

D - 168,275 mm

T - 41,275 mm

B - 41,275 mm

C - 30,162 mm

a - 38,6 mm

r min. - 3,6 mm

r2 min. - 3,2 mm

da min. - 116 mm

Da - 149 mm

db min - 109 mm

ra max. - 3,6 mm

rb max. - 3,2 mm

Db - 160 mm

Weight - 3,51 Kg

Basic dynamic load rating C - 224 kN

Basic static load rating C0 - 349 kN

Grease Lubrication Speed - 2200 r/min

Oil Lubrication Speed - 3000 r/min

Calculation factor e - 0,47

Calculation factor Y0 - 0,7

Calculation factor Y1 - 1,28

Bearing 685/672 KOYO Shielded bearings have a storage life of five years and a further two years operational life following installation. Wash all bearing parts with a noncontaminating solvent. Lightly pack the bearings with grease applying a 33% fill by volume into the bearing and housings. Where Bearing 685/672 KOYO space heaters are fitted, and the storage environment has wide humi dity and temperature variations, it is strongly recommended they be energised. Warnings should be placed on the Bearing 685/672 KOYO to make operatives aware of the live heaters Supplies are normally 220-240 volt single phase, from a 380-415 volt three phase supply. See terminal box lid for details.

Bearing 685/672 KOYO Shielded bearings have a storage life of five years and a further two years operational life following installation. Wash all bearing parts with a noncontaminating solvent. Lightly pack the bearings with grease applying a 33% fill by volume into the bearing and housings. Where Bearing 685/672 KOYO space heaters are fitted, and the storage environment has wide humi dity and temperature variations, it is strongly recommended they be energised. Warnings should be placed on the Bearing 685/672 KOYO to make operatives aware of the live heaters Supplies are normally 220-240 volt single phase, from a 380-415 volt three phase supply. See terminal box lid for details.

Insulation resistance During extended storage a three monthly insulation test is recommended to avoid possible lengthy drying out periods when installing Bearing 685/672 KOYO. Use a 500 volt d.c. Megger.The insulation resistance between phases and between the windings and the frame should be checked. The insulation resistance should be maintained above 10 megohm. If a lower reading is measured, use one of the drying out methods recommended on page 14 until an acceptable reading is obtained. If heaters are fitted but not energised, they should be used in future. Wound rotors Ideally, wound Bearing 685/672 KOYO brushes should not be in contact with the slip-rings during storage as there is a risk of corrosion. Brushes should either be lifted off the slip-rings or stored separately. This may not be possible with small Bearing 685/672 KOYO.

Insulation resistance During extended storage a three monthly insulation test is recommended to avoid possible lengthy drying out periods when installing Bearing 685/672 KOYO. Use a 500 volt d.c. Megger.The insulation resistance between phases and between the windings and the frame should be checked. The insulation resistance should be maintained above 10 megohm. If a lower reading is measured, use one of the drying out methods recommended on page 14 until an acceptable reading is obtained. If heaters are fitted but not energised, they should be used in future. Wound rotors Ideally, wound Bearing 685/672 KOYO brushes should not be in contact with the slip-rings during storage as there is a risk of corrosion. Brushes should either be lifted off the slip-rings or stored separately. This may not be possible with small Bearing 685/672 KOYO.