ABB DODGE USN 322 Manuale - Pagina 2

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INSTALLATION:

USN 500 and 600 Series Adapter Mount

Apply a coating of light oil or other rust inhibitor to the

adapter area of the shaft.

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. For bore sizes above 135 mm only, press these

top rollers inward ensuring contact with the center guide

ring. 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 for use

in Step 3e.

Note: Do not rotate bearing when moving feeler

between roller and outer ring.

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. Adapter Sleeve — Slide adapter sleeve onto the shaft,

threaded end outboard to the approximate location of

the bearing. Apply light coating of oil to sleeve O.D. Do

Not Use Grease.

d. Bearing — Make sure that the internal clearance has

been written down. Install bearing on adapter sleeve,

large end of tapered bore first. Locate bearing in proper

position on shaft.

Figure 1 - Internal Clearance

e. Lockwasher and Locknut — Install the lockwasher

on the adapter sleeve with inner prong located in the

slot of the sleeve and pointing towards the bearing.

Install locknut, chamfered face toward bearing as

Tighten locknut using a spanner wrench and hammer

until clearance noted in Step 2 is reduced by amount

shown in Table 1. During this step shaft should be

supported so all weight is off the bearing.

Table 1 - Adapter Mount Bearings Only

Shaft Diameter, (mm)

35, 40

45, 50

55, 60, 65

70, 75, 80

85, 90, 100

110, 115, 120

125, 130, 135, 140

* Amount of clearance to be removed from clearance measured in Step 2.

Reduction in Internal Clearance* (mm)

.020 - .025

.025 - .030

.030 - .038

.038 - .051

.046 - .064

.051 - .066

.064 - .089

Now find a lockwasher tab that aligns with a locknut slot and

bend tab into slot. If slot is past tab then tighten, not loosen,

locknut to meet a washer tab.

Steps f and g are not necessary if pillow block housing is a

cast closed end style.

f. Seal Ring — Install second seal ring with large O.D.

toward locknut.

g. V-ring Seal — Slide second V-ring seal onto the shaft,

making certain lip is toward bearing. Do not install

V-ring seal on seal ring until housing cap has been

set in place and tightened. For assistance in installing

seals, use instructions supplied with the seals.

Remove any paint, dirt or burrs from the mating surfaces of

the housing halves. Thoroughly clean seal grooves on both

sides. Set lower half of housing on base and apply oil to the

bearing seats.

Apply grease to the bearing and seal rings. The lubricant

should be smeared between the rolling elements (see

Grease Lubrication section). This step and the first

sentence of Step 9 do not apply for oil-lubricated bearings.

Place shaft with bearing into lower half while carefully

guiding the seal rings into the housing grooves.

Bolt lower half of the non-expansion bearing to the base.

Move shaft endwise so that spacer ring can be inserted as

shown on Figure 4. Center all other bearings on same shaft

in their housing seats. Note: Only one bearing per shaft is

non-expansion, other bearings should be expansion.

When closed end is required and the block is not a cast

closed, an optional end plug may be fit into the center seal

ring groove of the housing. Shaft extension should not be

beyond adapter end to ensure no rubbing with end plug or

housing on cast closed end.

Grease the bearing seal grooves in the housing cap and

place over the bearing after wiping the mating surfaces

(does not apply for oil-lubricated bearings). The two dowel

pins will align the cap with the lower housing half. Note:

Each cap must be matched with its mating lower half, as

these parts are not interchangeable. Cap and base have

serial number stamped at joint. The serial numbers should

line up for proper match. If the blocks are mounted other

than in the horizontal position, a sealer must be applied at

the cap and base mating surfaces.

10. Tighten cap bolts to the recommended torque shown on

Table 2.

11. Assure that there is running clearance at seal rings, then

install V-ring onto the seal rings as shown on Figure 4. Coat

V-ring seal with grease to protect against ozone attack.

12. Misalignment of plummer blocks must not exceed ±1/2º

(one-half degree).

Table 2 - Recommended Torque Value

Bolt Size, mm

Grade 8.8

47-51

Stainless Steel

A2/A4 Class 70

81-89

203-215

415-420

110

170

720-725

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