Page 76 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS

• Apply Prussian blue on all sides and bottom portion of the key so that proper bearing of key on the keyway is
ascertained.
• Insert the key in the keyway of the shaft and tap with a light weight soft hammer (Fig 5).
• Tap the hub on the shaft, and remove the hub from the shaft, check the key and note the high spots where the
key has made contact with the keyway of the hub.

• Lightly file the high spots away, the top of the key should be approximately 0.1mm clear.
• Repeat the fitting and filing operation until the hub is fit on to the shaft to the desired position (Fig 6).

Fig 5

Fig 6

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CITS : C G & M - Fitter - Exercise 65