Bearing 438/432A Timken

Tapered roller bearings 438/432A

Bearing number : 438/432A

Size mm : 44.45x95.25x27.783

Brand : Timken

Bore Diameter mm : 44,45

Outer Diameter mm : 95,25

Width mm : 27,783

Bearing dimensions and specification in brand catalogue :

d - 44,45 mm

D - 95,25 mm

T - 27,783 mm

B - 29,9 mm

C - 22,225 mm

R - 3,6 mm

r - 0,8 mm

a - -9,1 mm

Da - 87 mm

db - 57 mm

da - 51 mm

Db - 84 mm

Aa - 1,6 mm

Ab - 0,4 mm

Weight - 0,94 Kg

Basic static load rating C0 - 144 kN

Factor G1 - 42,5

Factor G2 - 11,3

Factor Cg - 0,0202

Factor K - 2,05

Basic dynamic load rating C90 - 30,5

Basic dynamic load rating Ca90 - 14,8

Basic dynamic load rating C1 - 118 kN

Calculation factor e - 0,28

Calculation factor Y - 2,11

Bearing 438/432A 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 438/432A 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 438/432A 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 438/432A 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 438/432A 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 438/432A 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 438/432A 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 438/432A 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 438/432A Timken.

Insulation resistance During extended storage a three monthly insulation test is recommended to avoid possible lengthy drying out periods when installing Bearing 438/432A 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 438/432A 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 438/432A Timken.

Insulation resistance During extended storage a three monthly insulation test is recommended to avoid possible lengthy drying out periods when installing Bearing 438/432A 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 438/432A 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 438/432A Timken.