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Vehicles & Models / Re: Steam Tractor 3/4" (Rudy K)
« Last post by Kim on Today at 05:50:56 AM »
Hi Bob,
Thanks for stopping by, I appreciate the support! :)

How far to the finish line?  Interesting question!  Well, I've got a lot done, but I'm sure I've got another year to go at my rate.  The big things left to go are completing the engine, the boiler and all the plumbing work, and few other sundries.  Beyond that, there's the painting & finishing that I don't enjoy so much.  So I've still got a goodly ways to go.  But I'll just keep plugging along, and having fun in the process!

Kim
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Vehicles & Models / Re: Steam Tractor 3/4" (Rudy K)
« Last post by 90LX_Notch on Today at 04:51:00 AM »
Still following along Kim.  How much more work is left untill the project is completed?

-Bob
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Engines / Re: W. Benson Vertical Steam Engine Diorama
« Last post by b.lindsey on Today at 01:47:33 AM »
I think all the superlatives have been used already John. It really is beautiful in every way, the engine and diorama both.

Bill
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Engines / Re: W. Benson Vertical Steam Engine Diorama
« Last post by Don1966 on May 27, 2017, 11:40:34 PM »
Beautiful results and nicely done John...... :praise2:

Don
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Vehicles & Models / Re: Steam Tractor 3/4" (Rudy K)
« Last post by Kim on May 27, 2017, 11:30:05 PM »
Today I started on the Cylinder Covers.

These were made from 1” brass rod.  After truing up and facing it off, I cut the centering disk 1/32” deep, and made it fit nicely in the cylinder.


Then cut it off from the parent stock.


Then I mounted my taig 3” chuck on my Grizzly lathe and use that to true up the other side and cut it to width.


Then I went over to the mill and coordinate drilled the mounting holes for the cover.


After transferring those holes to the cylinder, I drilled & tapped them 2-56.  The lower right hole looks a bit funny because I accidentally started out with the 4-40 tap.  It started getting real tight really fast and I figured out what I’d done! I swap out with the correct tap and all is well, but it put that pucker around that one hole.  I filed it flat when I was done and no one will be the wiser. :)


Now for the other cover.  (I’m showing these pictures out of order.  I actually did this part while I still had the 1" brass rod in the lathe.  I just thought it made a better narrative sticking with one cover at a time.)

This one has the Piston Rod coming through it, so I needed to keep the holes and the centering boss concentric.  I started on the opposite side,  cutting the 3/8” boss for the gland first.


Then I spotted, drilled and reamed the 1/8” hole for the piston rod.


Next, I drilled and tapped 1/4-28 for the piston rod gland.  I usually like to use the roll-form taps, but I didn’t have a 1/4-28 forming tap, so I went with what I had.  Just had to remember to drill the correct sided hole for a cutting tap!


After cutting it off, I went back to the Collet chuck and used a 3/8” collet to hold the cover in place.  I felt that using the collet on the 3/8" boss would keep things concentric while I cut the centering disk on the other side.


And here’s where I left off for the day:


Tomorrow I’ll drill the mounting holes in the second cover.

Thanks for stopping by!
Kim
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From Plans / Re: Benson engine
« Last post by kvom on May 27, 2017, 10:25:50 PM »
I've decided to remake the bracket so that there's a bit more more space.  Even after reducing the diameter of the pivot it's too close for comfort.
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Machines, Tools and Fixtures / Re: Bolts or Studs when Fastening Parts
« Last post by Admiral_dk on May 27, 2017, 10:16:16 PM »
I think George got the most important reason nailed with cost  :ThumbsUp:

I'm not sure, but where studs "in the mould" so to speak back then - again as not to use a tap, as George mentions ?
I can easily see that with aluminium, but how about cast iron and steel studs ?
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Engines / Re: W. Benson Vertical Steam Engine Diorama
« Last post by vcutajar on May 27, 2017, 09:01:06 PM »
Simply amazing John.

Vince
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My Workshop / Re: Finaly get started
« Last post by Camm-1 on May 27, 2017, 08:37:26 PM »
Buddy Holly sounds good😀

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My Workshop / Re: Finaly get started
« Last post by crankshafter on May 27, 2017, 08:26:52 PM »
Ha ha😎 here is about 30 c bloody hot today.
Yes maschines are prety easy to get😉
We quit for today its to hot
Tomorrow the ironnet and monday concrete.

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Some bits and pices from the start of the Holly Buddy.
Cs

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