[modeleng] Re: Re 3" Burrell
- From: "Terry Lane" <tel@xxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 4 May 2005 06:59:04 +1000
Never heard of Biros????? Biro was the bloke who invented, well, the BIRO.
Bit like Fred Acme invented the falling anvil.
> Al,
>
> Never heard of Biros, but then I don't go looking about in Wally World any
> more then necessary.
>
> At the GM&O, we first hand scraped valve seats on the locomotive brake
> valves and then used a polishing compound called "Putz Pomade"(sp) to do
a
> final lapping. GM&O would not buy the Putz Pomade so we got it from a
bloke
> at the IC RR where they kept it for polishing brass doorknobs etc. We
made
> our scrapers by hollow grinding 8" trangular files to a sort of rounded
> point. Make good scrapers those files do, provided you are careful not to
> over heat them while grinding.
>
> Jesse
>
> > Jesse, "Biros" is a brand of ballpoint pen sold by
> > Wal-Mart, et al, here in the States, and I am seeing
> > more clearly why Plasticine would work bettter for
> > keeping the abrasive from going where it was not
> > wanted while lapping the valve face on the Burrell.
> > BTW, the best way to do a Gunmetal or Bronze valve
> > face must be by scrapping rather than lapping, due to
> > the abrasive wanting to imbed itself in the soft
> > material?
> >
> > Al Messer
>
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