cautions for handling

1

Cautions for handling• Store condition• Clean• Non-Humid• Place which is not exposed to direct sunshine• Air flow between the box and floor

2

No Good !!

Untidy

Dusty

Humidity Sunshine

Danger

3

Fitting a Bearing on the Shaft

Always press the ring to be fitted.

4

Mounting

5

Fitting a Bearing into a Housing

Always press on the ring to be fitted.

6

Mounting

7

Thermal Mounting

Under no circumstances should you heat a bearing

by directly putting the torch on the bearing surface.

• Use oven, hot plate, or NSK bearing induction heater

• Clean heating apparatus

• Exercise care when using hot oil bath

• Do not heat above 248 deg F (120 deg C)

• Reference inner ring expansion chart in NSK catalog, fig. 14.3

8

• Precautions

– Make Sure Oil Is Free of Sludge

– Control Temperature, Do Not Overheat

– Keep Tank Covered When Not In

• Advantages

– Heat Large Heats Efficiently

– Safe For Bearing

• Disadvantages

– Oil Can Contaminate Bearing

– Heating Oil May Not Compatible with Lube

– Can Not Heat Sealed Bearings By This Method

Without using flames or oil uniform heating in short time is possible, making shrink fitting efficient and clean.

9

Bearing Removal Procedures

• Mark position/orientation of bearing

• Remove very carefully to avoid damage to shaft/housing

• Use appropriate tools (not hammers)

• Apply pressure to the ring with the interference fit

10

Dismounting

11

Dismounting

12

Dismounting by puller

13

Misalignment

Misalignment due to the bearing

being mounted out of square.