ABB DODGE USN 326 Manual - Página 3

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INSTALLATION:

USN 200 and 300 Series Direct Mount

Measure the internal clearance of the bearing before

mounting. Place the bearing in an upright position as

shown in Figure 1. Seat the inner ring and roller elements by

pressing down firmly on the inner ring bore while rotating

the inner ring a few times. Position the roller assemblies

so that a roller is at the top most position on either side.

Using a feeler gauge measure the clearance for each

side by inserting as far as possible and sliding over top of

roller (Figure 1). Write down the measured clearance and

compare with specifications Table 3. Note: Do not rotate

bearing when moving feeler between roller and outer ring.

Note: For cylindrical bore direct mount bearings, it

is not necessary to check internal clearance after

mounting. It is, however, important to verify the shaft

diameters (Tables 4, 5, and 6) and to measure the

unmounted internal clearance to ensure conformance

to specifications (Table 3).

Install the bearing parts in the following sequence (refer to

parts drawing):

a. V-ring Seal — Slide one of the V-ring seals onto the

shaft, making sure lip is toward the bearing.

Note: Do not install V-ring seal on seal ring until

housing cap has been set in place and tightened.

b. Seal Ring — Install a seal ring on shaft with largest

O.D. toward bearing.

c. Bearing — Install bearing. Bearings with cylindrical

bore up to 70 mm may be cold mounted on the shaft.

Apply coat of light oil to the shaft and bearing bore,

then press on the bearing by mechanical or hydraulic

device or use the mounting nut to drive the bearing

onto the shaft. Bearings with cylindrical bore above

70 mm are heated for mounting on shaft. Bearings,

heated in oil between 93°C and 102°C, should have the

bore wiped dry with a clean cloth and while bearings

are still in a heated condition, they should be rapidly

pushed on the shaft and positioned squarely against

the shoulder. A slight twisting motion during fitting

facilitates the mounting. Large bearings are generally

handled with a hoist or crane.

The use of proper safety equipment including heat

resistent gloves is required for all steps.

Table 3 - Radial Clearance of 222 Series Spherical

Roller Bearings (Straight Bore)

Basic Bearing No.

22209

22210

22211

22212

22213

22214

22215

22216

22217

22218

22219

22220

22222

22224

22226

22228

22230

22232

C3 Radial Clearance (mm)

Min.

Max.

.055

.075

.055

.075

.065

.090

.065

.090

.065

.090

.080

.110

.080

.110

.080

.110

.100

.135

.100

.135

.100

.135

.100

.135

.120

.160

.120

.160

.145

.190

.145

.190

.170

.220

.170

.220