Posted by Chris Case [108.247.158.98] on Friday, September 19, 2014 at 08:03:54 :
In Reply to: WM300 Brake Pedal, Cast or Malleable Iron? posted by Greg Coffin [64.24.134.62] on Thursday, September 18, 2014 at 21:04:24 :
You don't have to drill a big deep hole, maybe just the point of a 1/4" bit. Steel chips are long spirals, cast iron makes dust, malleable makes little chips mixed in with dust.
Other guys use a spark test by taking to a grind stone, but the drill chips are very obvious, little interpretation needed.
My experience on FFPWs is that a lot of the cast parts are malleable.
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