Author Topic: A Wallaby of my own.  (Read 252128 times)

Online steamer

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Re: A Wallaby of my own.
« Reply #510 on: December 22, 2013, 07:49:43 PM »
Thank you for your interest and support Achim! and Roger!... :praise2:

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

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Re: A Wallaby of my own.
« Reply #511 on: December 22, 2013, 07:57:26 PM »
That's a jolly complicated piece of machining, excellent job  :ThumbsUp: :ThumbsUp:

Lots left to do too!....getting the pump mounted to the gear case is the next goal...though I have some studs and stub shafts to make.  I'll crank on those after lunch.

The pump mount is eccentric to the pump drive, so It will need to be mounted temporarily so that I can tram in the position of the mounting "spigot" diameter, and bore the hole in the gear case appropriately.   I also want to put in a bronze bush to support the far end of the pump drive....so I'll take that on today too.

Dave
« Last Edit: December 22, 2013, 08:11:01 PM by steamer »
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

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Re: A Wallaby of my own.
« Reply #512 on: December 23, 2013, 10:13:47 AM »
Set the block back up on the Mill....It is mounted to my 3 sided angle plate which was a fleabay purchase.  It wasn't flat and square when I got it, so I scraped it in.   It was a simple project, and on a part like the block it comes in handy as it allows you to quickly set up on any one of 5 sides.   In this case, in my vise.   I dropped it in and checked it with an indicator on the previously milled face and it's less than .0005" in 6"....Nice!   I'll put a jack under it to support that outboard end hanging off the vise.



I made the gear case studs ( 5-40) and the idler gear stub shaft, and the temporary cam shaft arbor and trial fitted the case cover, and it seems really good.   I'll punch the 5-40 tapped holes for the studs, and bond in the idler arbor....then I can get on with the oil pump mounting/spigot.

Dave 
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline vcutajar

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Re: A Wallaby of my own.
« Reply #513 on: December 23, 2013, 10:40:48 AM »
Quietly following along.  Happy Xmas Dave.

Vince

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Re: A Wallaby of my own.
« Reply #514 on: December 23, 2013, 11:15:18 AM »
Thanks Vince!... Merry Christmas to you too!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline ths

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Re: A Wallaby of my own.
« Reply #515 on: December 23, 2013, 07:54:03 PM »
That looks great Dave, and all the best for the season. Hope it's not unbearably white over there.

Cheers, Hugh.

Offline Roger B

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Re: A Wallaby of my own.
« Reply #516 on: December 23, 2013, 08:15:42 PM »
According to friends in northern Mass it is more likely to be unbelievably green  ;D
Best regards

Roger

Offline Dave Otto

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Re: A Wallaby of my own.
« Reply #517 on: December 24, 2013, 01:46:31 AM »
Nice to see some progress on this one!

Do you offer angle plate scraping services?  :lolb:

Dave

Offline swilliams

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Re: A Wallaby of my own.
« Reply #518 on: December 24, 2013, 01:48:23 AM »
Nice stuff Dave. Holidays seem to suit you :)

Steve

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Re: A Wallaby of my own.
« Reply #519 on: December 24, 2013, 01:53:17 AM »
Nice to see some progress on this one!

Do you offer angle plate scraping services?  :lolb:

Dave

If it's not too big....we can talk!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

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Re: A Wallaby of my own.
« Reply #520 on: December 24, 2013, 01:54:49 AM »
According to friends in northern Mass it is more likely to be unbelievably green  ;D

Yup....we had about 18" of snow there for a couple of weeks....but it's been raining better part of 2 days now....so ...not much white stuff.

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline NickG

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Re: A Wallaby of my own.
« Reply #521 on: December 27, 2013, 05:43:51 PM »
Yeah nice stuff Dave, it looks like a proper model of an engine this one rather than a model engine if you know what I mean!

Online steamer

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Re: A Wallaby of my own.
« Reply #522 on: December 27, 2013, 06:03:38 PM »
Thanks Nick,

The gear pockets are about .020" shallow....messed up when I bored them apparently...but at least it was on the minus side!

I have a fixture made up to mount this back in the lathe to clean up bottoms of the case cover...each gear pocket in turn....but I have a problem.   My only camera Is my Android...and it just died...like won't boot up died....so its a ... I need to get the phone, to photo the fixture to post to the thread....kinda thing.....we'll see if I can get a deal on a after Xmas offer.

In any case, you all will be happy to know that a MUCH better camera is on the list of wants for the new one!....

all in all....it's coming....might even get the rotary table worked on this weekend even....the honeydo list just got a bit shorter.... ::) :cartwheel:

Once I get the case mounted, and the pump in.   The shafts will come next.   Crank and cam.    I think I'll do sealed ball bearings for the cam shaft...and with the .75 bore, should be plenty of room to do so.     The crank has me apprehensive....lots of cross drilling for oil ports in that....plenty of places to break drills or break out!....will buy some very nice drills for that.....I will be milling it from the solid, and then finish it up on the lathe ....if required.

Dave

"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

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Re: A Wallaby of my own.
« Reply #523 on: December 28, 2013, 04:38:27 PM »
OK I cleaned up the inside of the case, and everything clears now.

Next I clamped the case onto the front of the block/sump assembly with the gears in, located the crank bore, and swept in on the cam shaft bore, I clamped the case to the block, and match drilled the holes into the block/sump.....and then tapped them 5-40....and ......on the last hole......    SNAP!

Broke the tap.

It had a stub sticking out and I worked it gently for a while, and I was making some progress, when .....SNAP!...it broke flush....and the air turned blue!

OK...I remembered that I had a carbide drill set   PCB drills , really short.    So I set up on the hole, tightened the gibs, as tight as I dare cranked it up to oblivion speed, and drilled the tap out .156"

It went swimmingly!......Made up a 10-32 plug, and I have it setting with Loctite as we speak.

Next up is the boring of the oil pump bore.    This is the money shot.      But I have a race car to crew on first 8)

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Don1966

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Re: A Wallaby of my own.
« Reply #524 on: December 28, 2013, 04:51:17 PM »
Glad you managed to escape that Dave, but it would be nice to see some photos.

Don

 

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