Bearing 42690/42620 Timken

Tapered roller bearings 42690/42620

Bearing number : 42690/42620

Size mm : 77.788x127x30.162

Brand : Timken

Bore Diameter mm : 77,788

Outer Diameter mm : 127

Width mm : 30,162

Bearing dimensions and specification in brand catalogue :

d - 77,788 mm

D - 127 mm

T - 30,162 mm

B - 31 mm

C - 22,225 mm

R - 3,6 mm

r - 3,3 mm

a - -2,8 mm

Da - 121 mm

db - 91 mm

da - 85 mm

Db - 114 mm

Aa - 3,4 mm

Ab - 0,9 mm

Weight - 1,38 Kg

Basic static load rating C0 - 222 kN

Factor G1 - 96,2

Factor G2 - 28,6

Factor Cg - 0,0333

Factor K - 1,39

Basic dynamic load rating C90 - 38,7

Basic dynamic load rating Ca90 - 27,7

Basic dynamic load rating C1 - 149 kN

Calculation factor e - 0,42

Calculation factor Y - 1,43

Bearing 42690/42620 Timken 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 42690/42620 Timken 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 42690/42620 Timken 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 42690/42620 Timken 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 42690/42620 Timken 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 42690/42620 Timken 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 42690/42620 Timken. 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 42690/42620 Timken 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 42690/42620 Timken.

Insulation resistance During extended storage a three monthly insulation test is recommended to avoid possible lengthy drying out periods when installing Bearing 42690/42620 Timken. 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 42690/42620 Timken 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 42690/42620 Timken.

Insulation resistance During extended storage a three monthly insulation test is recommended to avoid possible lengthy drying out periods when installing Bearing 42690/42620 Timken. 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 42690/42620 Timken 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 42690/42620 Timken.