Brass taper plug cock dimensions

Brass taper plug cock dimensions

This topic has 8 replies, 4 voices, and was last updated 21 February 2019 at 19:02 by David Hill 5.

Viewing 9 posts - 1 through 9 (of 9 total)

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21 February 2019 at 13:17 #397316
David Hill 5
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@davidhill5
I need to make some taper plug cocks for my large steam engine and am wondering what sort of taper to use. Obviously too fine and it will jamb. I was wondering about using a taper pin reamer that has a 1/48 taper. Would this be too fine?

Thanks for any help.

David
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21 February 2019 at 13:17 #9543
David Hill 5
Participant
@davidhill5
21 February 2019 at 13:38 #397318
JasonB
Moderator
@jasonb
I think around 7-10degrees included angle would be better, your 1:48 will tend to lock.

best to make a taper reamer at the same setting when you turn the spindles
21 February 2019 at 14:27 #397325
Maurice Cox 1
Participant
@mauricecox1
Jason; I do like the look of your taper plug cock! Is the body a casting, filed/milled from solid or two pieces silver soldered together?

Regards

Maurice.
21 February 2019 at 15:22 #397330
JasonB
Moderator
@jasonb
Cut from a bit of 5/8" square, I did later solder on the threaded drain pipe connection
21 February 2019 at 17:07 #397341
David Hill 5
Participant
@davidhill5
Gosh, that looks superb. Excellent suggestion Jason about cutting the plug and a D reamer on the same setting. Just a question about the D reamer, I guess that you used reasonable hard steel but did you heat treat it?

David
21 February 2019 at 17:57 #397350
Brian H
Participant
@brianh50089
Magic! They look good Jason and by chance I have to make a pair myself, but without the drain pipe connection.

Brian
21 February 2019 at 18:26 #397353
JasonB
Moderator
@jasonb
Silver steel, hardened but did not bother to temper.
21 February 2019 at 19:02 #397364
David Hill 5
Participant
@davidhill5
Great, thanks Jason.

David
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