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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by derekwarner_decoy on Today at 07:34:04 PM »
'the top/bottom caps and cylinder are not held together with studs at each end, the studs actually go all the way through and are held by the end of the crosshead guide'

This isn't all that different Chris, providing that the headcap & endcap are spigoted to the barrel, and the opposite side of the headcap spigoted to the individual crosshead......[the only downside is a stripped tapping in the crosshead/s]

I find this crosshead tappings surprising, as it does not have any redundancy considering the machine in itself is  :hammerbash: absolutely in the highest levels of impulsive nature

I suspect the tie-rod bolts would have been rolled threads [over machining] as the rolling production imparts parallel grain structure and as such far greater strength than a machined thread & the change of section etc

Derek
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Hello Everyone,

It appears that Chris and other forum members are rewarded with lots of cookies after completing work on one of their projects. An acknowledgment, of sorts, of their fine work.  :LickLips:

Well Iím not sure what the implication is, but I was only given one cookie for the work completed so far on the Buggy Project?  :embarassed:

Have a great day,
Thomas
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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by crueby on Today at 07:16:30 PM »
Gotta hand it to you, I never saw anybody make an expanding mandrel with a deli slicer before!  :ThumbsUp:

Well done! the straps look like a great fit to the eccentrics.
Getting hungry, gotta go make lunch....!
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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by cnr6400 on Today at 07:15:26 PM »
Gotta hand it to you, I never saw anybody make an expanding mandrel with a deli slicer before!  :ThumbsUp:

Well done! the straps look like a great fit to the eccentrics.
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From Kits/Castings / Re: Textile Mill Diorama
« Last post by J.L. on Today at 06:45:54 PM »
Marv.,
Thanks for responding. Your machine is absolutely perfect.

Mine will be a stripped down version partially covered with a tarp! And so it should be compared to this masterpiece of yours.

Marv, your lathe should be mounted on a walnut base and proudly displayed on the mantlepiece!  :ThumbsUp:
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From Plans / Re: G Britnell's Fordillac
« Last post by Shiroth on Today at 06:45:33 PM »
I think that Achim fancies a set of castings  :)  :stir:

This looks interesting although 3D printing is totally outside my experience (I can do small cars for children though)  :ThumbsUp:

Ah, if that is the case and it does end up working out, I would have to work out some kind of deal with George if he is interested as they are his plans.

3d printing isn't very hard at all, id say that the cad is much harder then printing. the printing is a lot of trouble shooting minor things 99% of the time.
once its setup the way that works best for you, there is minor messing around with it. mostly just re leveling the bed.
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From Plans / Re: G Britnell's Fordillac
« Last post by Roger B on Today at 06:34:37 PM »
I think that Achim fancies a set of castings  :)  :stir:

This looks interesting although 3D printing is totally outside my experience (I can do small cars for children though)  :ThumbsUp:
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Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by crueby on Today at 06:28:56 PM »
Hi Chris, may be for the next time.
https://www.2spi.com/category/crystal-bond/
I have some of that, works pretty well. The things that the mandrel does so much better is self-aligning the parts to center, and allowing me to remove the part to test fit, and put it back on again very easily. It is a one-size tool, but it would be possible to turn the rim slightly smaller if needed for another part later. All in all, it only took a few minutes to make and saved a lot of time making multiple parts.
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From Kits/Castings / Re: Textile Mill Diorama
« Last post by mklotz on Today at 06:18:46 PM »
Yes, John, I built it and, yes, there are some tricky bits.



I tried to fix it so it could be turned by using the treadle pedal but never got that to work.  The flywheel, being aluminum, has a very small moment of inertia.  I added a hidden steel band inside the flywheel to increase the moment but even that was not enough to overcome the friction of the belt.

I wanted to mount a turning on centers and decided, for authenticity, it needed a four-blade live center as used on full-size wood lathes.  Milling that into a miniscule taper pin would have to be done "with the dials" since my eyesight wasn't  good enough to do it by sight.  I decided to test out my milling plan computations in brass first and the result is shown below.



The live center came out perfectly and made it a bit easier to bear the fact that I couldn't get the treadle to work properly.

Oh, and like you, I replaced all the slotted screws with proper hex heads.



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From Plans / Re: G Britnell's Fordillac
« Last post by Shiroth on Today at 06:14:27 PM »
Very nice, may be I should contact DHL and ask them for there freight rate from Canada to Germany.

Why is that?
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