[modeleng] Re: Re 3" Burrell
- From: "JESSE LIVINGSTON" <fernj1@xxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Tue, 3 May 2005 08:58:48 -0500
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
MODEL ENGINEERING DISCUSSION LIST.
To UNSUBSCRIBE from this list, send a blank email to,
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.
Other related posts:
