|
|
| Re: Flat wheel spots on the R46 (350556) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: Flat wheel spots on the R46 |
|
|
Posted by tracksionmotor on Sat Dec 9 17:26:22 2006, in response to Re: Flat wheel spots on the R46, posted by RonInBayside on Sat Dec 9 16:52:11 2006. Shelling; A condition where excessive braking friction caused surface metal to flake with an underlying cavity. Spalling: A condition where excessive braking friction caused surface metal to be weakened lacking the flakes or underlying cavity indicitive of meral color...surface burn. Flats: Condition of excessive braking where wheel surface was ground down to a flat surface not necessarilly having indicaton upon rail of spalling/shelling.When you learn wheel inspection and taught to pass your hand over wheel where you cannot see, you remember the first time wheel shelling sliced your fingers! ?Shelling occurs with high weight per wheel and high speeds not found in subways ordinarily...surface metal is flaked at tread level and may pass inspection IF nobodys looking. |
|
|
|