Valve handwheels

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Valve handwheels

This topic has 9 replies, 6 voices, and was last updated 27 January 2012 at 16:55 by Bernard Laycock 1.

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3 February 2011 at 16:32 #63480
Bernard Laycock
Participant
@bernardlaycock66604
I am building the 11/2″ scale Allchin and am trying to fabricate the valve handwheels in steel. They are a very unusual design, but I am sure many model engineers have succeeded, even though the construction manual is lacking any detail of this task. I wonder if any member who has managed what to me is an impossible task. I wanted to include a photo of the prototype and a photo copy of the drawing, but I can’t work out out to do this. Any information would be much appreciated. Bernard
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3 February 2011 at 16:32 #2705
Bernard Laycock
Participant
@bernardlaycock66604
How to make
3 February 2011 at 16:40 #63481
JasonB
Moderator
@jasonb
I think I would turn the handwheel including a flat disc all the way around the outside and then file that disc away to leave the four protruding grips.

Other option would be again to turn the wheel and solder four lengths of flat strip to the rim which could then be cut back to length and filed to profile.

Jason
3 February 2011 at 21:50 #63494
Jeff Dayman
Participant
@jeffdayman43397
Any chance of a pic of what shape you’re trying to make Bernard? I may have some ideas on how-to (or know where to get some similar commercial ones)

Thanks JD
3 February 2011 at 22:34 #63499
Bernard Laycock
Participant
@bernardlaycock66604
I could post a photo and a drawing, but I can’t figure out how to insert these into my post.
4 February 2011 at 17:50 #63565
JasonB
Moderator
@jasonb
Bernard, the easiest way is to go to the headings along the top of the homepage and click on Albums. This will then give you the option of creating an album where you can upload photos and scans from your computer.

When posting click on the “insert image” icon along the top of the reply window and select the photo from your album. Something like this should then appear.

As I said its all turning then either solder the 4 tabs on as overlength strips or leave a disc all round the outside to be cut away in much the same way you would with a spoked handwheel except the “spokes” are outside the rim.

J
4 February 2011 at 18:48 #63567
Stewart Hart
Participant
@stewarthart90345
This is the handle I made for my loco

[IMG]http://i431.photobucket.com/albums/qq32/sbwhart/Mabel%20Valve%20Gear/100_2041.jpg[/IMG]

and this is how I made it

[IMG]http://i431.photobucket.com/albums/qq32/sbwhart/Mabel%20Valve%20Gear/100_2031.jpg[/IMG]

Hope this helps

Stew
4 February 2011 at 23:50 #63583
GoCreate
Participant
@gocreate
Hi Bernard

Although in 3″ scale, I made the valve handles as Jason’s first description, that is, turning to shape and including a flat ring on the outside, then filing away the flat ring to leave the 4 tabs.

Nigel
25 January 2012 at 22:39 #83001
Bernard Laycock 1
Participant
@bernardlaycock1
Hi Stew

I’m sorry to say that I missed your post of 04/02/2011 about the making of the Allchin valve handle and I find they have now been deleted. Is there any chance you could repeat them for me? I would be grateful.

Bernard
27 January 2012 at 16:55 #83195
Bernard Laycock 1
Participant
@bernardlaycock1
Hi Jason

Thanks for the reminder about your previous post. For some reason I lost track of this topic and appreciate the reminder

Bernard
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