Author Topic: Vince's version of the Monitor Steam Engine  (Read 88099 times)

Online crueby

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Re: Vince's version of the Monitor Steam Engine
« Reply #30 on: April 26, 2016, 01:19:43 AM »
I've no real experience here.
The bolts you have look good to me...but I'd probably throw them on the lathe and face off the markings.

But who knows what I'll end up on mine. It's such a struggle getting the time to do the job right...I may end up with...gasp...socket head cap screws.

(I didn't say that did I? Nah.)
Zee, you always have the time to do it right,

Thanks Dad.  :lolb:

Thats enough young man! You go straight to your shop and make something right now!!   :old:

Wait a minute, you are older than me!?  :lolb:

Offline zeeprogrammer

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Re: Vince's version of the Monitor Steam Engine
« Reply #31 on: April 26, 2016, 02:32:38 AM »
I've no real experience here.
The bolts you have look good to me...but I'd probably throw them on the lathe and face off the markings.

But who knows what I'll end up on mine. It's such a struggle getting the time to do the job right...I may end up with...gasp...socket head cap screws.

(I didn't say that did I? Nah.)
Zee, you always have the time to do it right,

Thanks Dad.  :lolb:

Thats enough young man! You go straight to your shop and make something right now!!   :old:

Wait a minute, you are older than me!?  :lolb:

I don't know about years. But certainly not in spirit.  :Lol: And that's what counts.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline bruedney

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Re: Vince's version of the Monitor Steam Engine
« Reply #32 on: April 26, 2016, 02:49:15 AM »

I don't know about years. But certainly not in spirit.  :Lol: And that's what counts.

I hear that aged spirits are the best kind - not that I partake anymore but that is what I have heard

Bruce
‘Results! Why man, I have gotten a lot of results. I know several thousand things that won’t work.’ — Thomas Alva Edison

Offline vcutajar

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Re: Vince's version of the Monitor Steam Engine
« Reply #33 on: April 26, 2016, 05:05:23 AM »
Thanks guys for the feedback.

Quote
(although I cheat and use threaded rod and not real studs like Jo does)

Don't worry Jim.  That's the way I also do it.

Vince

Offline Captain Jerry

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Re: Vince's version of the Monitor Steam Engine
« Reply #34 on: April 26, 2016, 12:38:53 PM »
Thanks guys for the feedback.

Quote
(although I cheat and use threaded rod and not real studs like Jo does)

Don't worry Jim.  That's the way I also do it.

Vince

Use what ever you want, as long as you dome the ends!
There are thing that you can do and some things you can't do.
Don't worry about it. try it anyway.

Offline vcutajar

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Re: Vince's version of the Monitor Steam Engine
« Reply #35 on: April 27, 2016, 04:41:44 PM »
Thanks Jerry

Vince

Offline vcutajar

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Re: Vince's version of the Monitor Steam Engine
« Reply #36 on: April 27, 2016, 04:52:26 PM »
The 3mm slot drill arrived but in the meantime I started work on items 14 and 15, the cylinder mounting plate and the rear frame spacer plate.  They are identical to each other except that one of them also has the mounting holes for the cylinder.  I am thinking that for now I am not going to drill for the cylinder mounting holes.

These were made using aluminium flat bar 12mm thick and 25mm wide.  Cleaned up all the sides with sandpaper and took a skim cut to the top of the plate to make sure it is flat.  Also used this face as the datum for the 3mm tapped holes.



A family shot of what I have till now.



Next I will do the 3mm slots.

I was looking at the plans at the bronze bearings for the crankshaft and it says a light press fit.  I wonder what it actually means?  Sort of a slip fit?

Vince

Online crueby

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Re: Vince's version of the Monitor Steam Engine
« Reply #37 on: April 27, 2016, 05:28:42 PM »
The oil cups for the bearings keep them from moving, so I just made mine a slip fit into the frames. Looking great!

Offline zeeprogrammer

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Re: Vince's version of the Monitor Steam Engine
« Reply #38 on: April 27, 2016, 06:18:21 PM »
We're talking about the bearings in the center of the frames right?
They do have oil cups (on the metric plans only if I recall - not that it matters) but the bearings also have a collar that keeps the bearings in place.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline vcutajar

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Re: Vince's version of the Monitor Steam Engine
« Reply #39 on: April 27, 2016, 06:34:58 PM »
Carl the metric plans also have the collars.

Vince

Offline zeeprogrammer

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Re: Vince's version of the Monitor Steam Engine
« Reply #40 on: April 27, 2016, 08:31:45 PM »
Carl the metric plans also have the collars.

Yes the collars are in both plans...but not the oil cups (I don't believe).

But does it answer your question about the fit? I'm thinking they mention 'light press fit' just to take out play between the bearing and the frame.
I don't know how much looser a slip fit would be or whether it makes a difference.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline vcutajar

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Re: Vince's version of the Monitor Steam Engine
« Reply #41 on: April 27, 2016, 09:17:31 PM »
What I understand to be a slip fit is that that I can insert it in the hole with my hand and having minimal play and it can rotate freely in the hole.

I think I will go for that.  The collar will not guarantee that it will not rotate but as Chris said, the oil cup should lock it in place.

Vince

Offline zeeprogrammer

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Re: Vince's version of the Monitor Steam Engine
« Reply #42 on: April 27, 2016, 10:36:38 PM »
Ah, I get it.  :facepalm:

It wasn't about the bearing moving in and out. It was about rotating.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline vcutajar

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Re: Vince's version of the Monitor Steam Engine
« Reply #43 on: April 28, 2016, 12:31:52 PM »
Next up was to make the slots in the outrigger base frame.  I had already resigned myself to do the slots using a slitting saw but then Bruce did his and he reminded me that there are slot drills and endmills whose shank diameter is the same as the cutter diameter.  Totally forgot about it.

So I ordered one and received it a couple of days ago.



Marked it up and proceeded with the cutting operation.



Used 0.5mm DOC per pass.  The plans called for a depth of 13mm but I made it 13.5mm to give me some extra sideways adjustment just in case I need it.

The new carbide cutter did a nice job of it and it did not take long to finish all four slots.



Trial fit with the inner frames.



Vince

Offline vcutajar

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Re: Vince's version of the Monitor Steam Engine
« Reply #44 on: April 30, 2016, 09:56:47 AM »
Did the spacers that go between the frames.  These are items 5 and 6.  I would have liked to make them from 8mm stainless steel but did not have that size and was too lazy to go get some.  So made them from BMS instead.



Fitted in place.



I guess that finishes the infrastructure on the model but before I continue further I will be making some studs.  If I don't make them now they will never be done.

Vince