Author Topic: A Wallaby of my own.  (Read 252081 times)

Offline steamer

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Re: A Wallaby of my own.
« Reply #1065 on: January 28, 2019, 02:35:15 PM »
Actually I do have a 5c collet block...ill check that tonight

Dave
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Offline Craig DeShong

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Re: A Wallaby of my own.
« Reply #1066 on: January 29, 2019, 12:07:35 AM »
Interesting to see different ways of attaining the same result.  Look'in good

 :popcorn: :popcorn: :popcorn:
Craig
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Offline Don1966

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Re: A Wallaby of my own.
« Reply #1067 on: January 29, 2019, 12:21:30 AM »
Hey Dave buddy won’t it be easier to put the bearings into the Conrod’s then bore them to size...just saying!

Don

Offline steamer

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Re: A Wallaby of my own.
« Reply #1068 on: January 29, 2019, 12:24:50 AM »
Hey Dave buddy won’t it be easier to put the bearings into the Conrod’s then bore them to size...just saying!

Don

I did mention that when I was talking to George....Hanging on to the conrod is a tough nut though...now that it's machined'

The fixture I made is missing just the hole.   It's actually a split cap   the two cap screws will come out and it opens up.

What that fixture does that nothing else does is I can measure width in place.   Hard to do inside a 5C.     hmmmmmm


Dave
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Offline steamer

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Re: A Wallaby of my own.
« Reply #1069 on: January 29, 2019, 03:23:47 AM »
Well after some thought....I'm going to go with the original fixture.   I think it will give me what I want in a easy set up.   

Step 1    Cut the "A" side flange to final width
Step 2    Split the blanks.
Step 3    Mount in fixture "B" side flange up, and face to final width and bore to final size

Dave
« Last Edit: January 29, 2019, 03:30:25 AM by steamer »
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

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Re: A Wallaby of my own.
« Reply #1070 on: January 30, 2019, 01:38:50 AM »
A good nights work!

The fixture works great!   Next step I think I'll drill the blanks just big enough to get my boring bar in before I split them

But you cut the face, flip the part cut the face.   done!....

Easy peasy!

I sequenced the photos in order of operations.

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

Offline b.lindsey

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Re: A Wallaby of my own.
« Reply #1071 on: January 30, 2019, 02:11:13 AM »
 That worked out very well!! Looking forward to the next steps now.

Bill

Offline steamer

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Re: A Wallaby of my own.
« Reply #1072 on: January 30, 2019, 02:20:48 AM »
Leg is screaming at me tonight brotha.....tomorrow...got to rough drill the blanks before I split them...otherise I'll be there for ever with the boring head.

I have two matched pairs of shells....throw #1 and throw#2...based on actual journal width..which varies 0.002"

Dave
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Offline Kim

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Re: A Wallaby of my own.
« Reply #1073 on: January 30, 2019, 05:34:31 AM »
That was pretty neat.  Facing it off in the mill like that let you measure it directly while you're doing the work, which is pretty cool!

Yeah, do take care of your leg, Dave.

Kim

Offline Jo

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Re: A Wallaby of my own.
« Reply #1074 on: January 30, 2019, 07:17:26 AM »
Nice, that jig would also work well to do that on the lathe.

Jo
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Offline steamer

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Re: A Wallaby of my own.
« Reply #1075 on: January 30, 2019, 10:52:53 AM »
Ill need to take the rake off the drills I use, staring with .250 and working up to 0.375.

Technically i guess its a Bell chuck or Bell fixture....im holding the work, not guiding the tool.    I like it, the OD journals of the bearings are .001" oversize to make sure I have some grip on them in the fixture, though a few stokes of a file on the fixture bearing cap can tighten it up some more if need be.   But I do need to take the rake off the drills when I drill them.  Even then, its going to be a delicate job.
Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

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Re: A Wallaby of my own.
« Reply #1076 on: January 31, 2019, 12:21:13 AM »
Well It was a good night.     I just sharpened a 0.343 drill for brass and punched four holes....that was it!    Very satisfying none the less

No need to step drill  It went through no trouble.    Now I need to cut the shells and I spent some time figuring on that operation.

I think I need something to support the shell against the mill vise pressure...so that will be a bit of aluminum with a 1/2" half round cut in it for the bearing to sit in. That way when I clamp it down I bear on the aluminum through the bearing shell flange.  That way I'll be able to get a good grip on it while I gently mill half of it off.

Proof of some effort this evening....notice the "ribbony" chips from a drill ground like this.
<a href="https://www.youtube.com/watch?v=pAngKHIZgyA" target="_blank">http://www.youtube.com/watch?v=pAngKHIZgyA</a>



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

Offline Roger B

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Re: A Wallaby of my own.
« Reply #1077 on: February 01, 2019, 07:17:39 AM »
I'll believe you that there is a bearing under all that swarf  :stir:   :)  :)  :wine1:
Best regards

Roger

Offline steamer

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Re: A Wallaby of my own.
« Reply #1078 on: February 01, 2019, 12:40:43 PM »
It's interesting...The swarf from this kind of ground drill is very ribbony....the swarf on top of the fixture is JUST 1 bearing hole....it seems volumus!....but it's just that it's very "poofy"

I just didn't have the snot to get going last night....long day.

Tonight I hope....definitely tomorrow...

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

Offline b.lindsey

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Re: A Wallaby of my own.
« Reply #1079 on: February 01, 2019, 01:56:58 PM »
Well it ain't a race Dave. Do it when you feel like it and when its fun!! The weekend is near :

Bill

 

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