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Bearing Wear Identification

(April 11, 2017)

Image showing typical wear patterns & causes.

bearing_damage

 

Bearing sizes

 

Case Line Bore Thrust Crank
     

Std - 65mm

Std - 22mm Std - 55mm

1st - 0.5mm

65.5mm

1st - 1mm

21mm

1st undersize - 0.25mm

54.75mm

2nd - 1.0mm

66mm

2nd - 2mm

20mm

2nd undersize - 0.50mm

54.5mm

3rd - 1.5mm

66.5mm

 

3rd undersize - 0.75mm

54.25mm

4th - 2mm

67mm

 

4th undersize - 1.00mm

54mm

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