greets folks!
sheesh.. i turn my back for 10 minutes and this place turns into a madhouse. a madhouse!
strange thing happened today and was hoping to get some insight..
a huge 100#+ cast iron gear came in the door the other day with a fractured bore/keyseat.
plan was to burn out the old hub and bolt in a new (flanged) one.
all went well until i fired the torch up. this cast iron wouldn't burn! it kept peeling back in layers.. like onion skins. i'd preheat, puddle would form, i'd lay in with the oxy, get a shower of molten iron, and i'd lose the burn. i kept repeating this (figuring i wasn't hot enough) but no dice.
i got into it about 1/2" before i gave up and just drilled the whole bore out. (about 60 1/8" holes around the perimeter and a "light tap" with the 5lb hammer
i'm wondering if this cast iron wasn't just so dang old it absorbed alot of dirt/oil?
any thoughts?
-tony
sheesh.. i turn my back for 10 minutes and this place turns into a madhouse. a madhouse!
strange thing happened today and was hoping to get some insight..
a huge 100#+ cast iron gear came in the door the other day with a fractured bore/keyseat.
plan was to burn out the old hub and bolt in a new (flanged) one.
all went well until i fired the torch up. this cast iron wouldn't burn! it kept peeling back in layers.. like onion skins. i'd preheat, puddle would form, i'd lay in with the oxy, get a shower of molten iron, and i'd lose the burn. i kept repeating this (figuring i wasn't hot enough) but no dice.
i got into it about 1/2" before i gave up and just drilled the whole bore out. (about 60 1/8" holes around the perimeter and a "light tap" with the 5lb hammer
i'm wondering if this cast iron wasn't just so dang old it absorbed alot of dirt/oil?
any thoughts?
-tony
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