| [Scratches] |
 |
Scratches are relatively
shallow marks generated by sliding contact, in the same direction
as the sliding. This is not accompanied by apparent melting of material. |
| [Scuffing] |
|
Scuffing refers to marks,
the surfaces of which are partially melted due to higher contact pressure
and therefore a greater heat effect. Generally, scuffing may be regarded
as a serious case of scratches. |
|
Scratches
on raceway or rolling contact surface |
|
Insufficient lubricant
at initial operation |
|
Careless handling |
|
|
Apply lubricant to
the raceway and rolling contact surface when mounting. |
|
Improve mounting
procedure |
|
