Author Topic: Bailey's 1881 Bee  (Read 3949 times)

Offline Dave Otto

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Re: Bailey's 1881 Bee
« Reply #60 on: October 06, 2021, 05:05:57 PM »
Nice assembly Jo, coming along nicely.

Dave

Offline Jo

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Re: Bailey's 1881 Bee
« Reply #61 on: October 07, 2021, 04:27:46 PM »
Thank you Dave  :) I think that is hopefully the hardest of the bits to make for this engine. Its downhill from now onwards  :lolb:

Reaching up from the connecting rod is a drive link. Anthony expected this to be a casting and so would I  :stickpoke: Instead we are making it out of Brass:



It is a pretty hefty piece of Brass and not the sort of bit most people would have hanging around  :stickpoke: Luckily I had a suitable piece in my come-in-handie stash. The way it is drawn does not help you lay it out on a piece of bar. So first job find out the distance between centres to enable me to position it on the barstock:



The piece has been taken down to 8mm thick and has had the two holes drilled in the appropriate places:



You can see I have also added two pairs of buttons through the holes to protect them as I hand carve (hacksaw/files) the shape out:



Making sure to keep sufficient of the piece still there to be able to hold it:



Then turn 1.5mm bosses using the buttons to hold the piece:



Finally filing the two sides down to leave it 5mm thick:



The only really tricky bit was getting the clearance on the connecting rod so that it moves freely:



Nearly time to negotiate another set of castings  :wine1:

Jo
Enjoyment is more important than achievement.

Offline Roger B

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Re: Bailey's 1881 Bee
« Reply #62 on: October 07, 2021, 04:42:01 PM »
That's some rather artistic work  :ThumbsUp:  :ThumbsUp:  :wine1:
Best regards

Roger

Offline Admiral_dk

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Re: Bailey's 1881 Bee
« Reply #63 on: October 07, 2021, 05:09:30 PM »
Except for the holes are all of the rest done free hand ?
If so, I can only agree with Roger - really nice work  :cheers:

Offline RReid

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Re: Bailey's 1881 Bee
« Reply #64 on: October 07, 2021, 05:29:28 PM »
Oh My - that's pretty! Continuing to enjoy following your work, Jo. :popcorn:
Regards,
Ron

Offline Vixen

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Re: Bailey's 1881 Bee
« Reply #65 on: October 07, 2021, 06:01:32 PM »
Some nice hand work there Jo.  :ThumbsUp: :ThumbsUp:

You are certainly cracking on at a fast pace.

Mike
It is the journey that matters, not the destination

Oh! sod the journey, lets hit the bar and pool instead.

Offline bent

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Re: Bailey's 1881 Bee
« Reply #66 on: October 07, 2021, 09:56:35 PM »
Lovely stuff.  Wondered at the size of the file buttons until you turned them down to size...nice trick! :popcorn:

Offline Jo

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Re: Bailey's 1881 Bee
« Reply #67 on: October 13, 2021, 03:16:28 PM »
Thanks Guys  :)

I was hoping to have gotten a bit more done by now. I managed to successfully turn the three pivots then moved on to start the crosshead which is made out of a piece of square brass. Thinks I mount that up in a collet block and it will provide better support and I won't have to cut down the piece of bar...

As you can see the collet does not fit square in the block  :rant: this is one of those they haven't a clue about quality control Chinese bits  :ShakeHead: Why won't it fit true? The locating groove down the side of the collet has not been cut central to the other two slots  :disappointed: So its another Chinese tool that is worth even less than the bargain price I paid for it  :Doh: I have written on the side of the collet to remind me it is  :censored:

Jo
Enjoyment is more important than achievement.

Offline bent

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Re: Bailey's 1881 Bee
« Reply #68 on: October 13, 2021, 06:32:06 PM »
Oof.  I suppose you could cut a correctly positioned slot on another leg of the collet, but... :headscratch: :rant: :cussing:

Offline Jo

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Re: Bailey's 1881 Bee
« Reply #69 on: October 14, 2021, 11:38:30 AM »
Never trust a chinese tool.....

I fancied doing the casting today. Anthony's instruction is drill the three holes in the right place and mill to width  :noidea: This is my alternative version of that:

Lets start by checking the casting shape to see if it is off side and where the reference can be taken from:



Looks like the two main faces are rather tapered. We need to get rid of that first. So start by making it so we can safely hold it by removing the bulge on the top of that boss:



Then first making sure we are milling the correct side:



We can make the two sides parallel:



Mark out were we want the pivots to go:



Use those centre pops to position on a jig:



With it clamped down firmly drill smaller (than the final sized reamed hole) tapping drill sizes in the casting and on through to the jig:



Drill the jig clearance (6BA and 4BA  ;) )

Secure casting to jig:





With all the hard work done it is now time for the enjoyable easy bit  :)

Jo



Enjoyment is more important than achievement.

Offline Dan Rowe

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Re: Bailey's 1881 Bee
« Reply #70 on: October 14, 2021, 02:27:58 PM »
Jo, your explanation and photos of how to machine a complicated casting is certainly more useful than the sparse drill three holes in the right position. Thanks for taking the time to write this up.

Cheers Dan
ShaylocoDan

Offline Jo

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Re: Bailey's 1881 Bee
« Reply #71 on: October 14, 2021, 04:25:02 PM »
Thank you Dan  :) Castings are nothing to be frightened of so long as you spend a little time thinking about how to go about make them.

The Casting can now have 2mm off the larger/ rough face:



Then it can be taken off the jig and the actual measurements calculated to come off each side. Remember the large facing milling cutter previously used is already zeroed ready to go:



Once to width I swapped over to an 8mm cutter. Zeroed on the jig face, which then told me the final face needed to be 9.5mm up from that and it was milled to width. Now that everything is ready we can clamp the casting back onto the jig and drill and ream the three holes:



I was getting tired  :-[ and forgot that one of these holes should be reamed 3.18mm and drilled it 3.8mm ready to ream 4mm  :Doh: Having bunged up the hole by silver soldering in a plug. It could then be drilled and reamed the correct size. Notice that the use of the jig means I could lift the casting off go and "bodge" it then remount it using dowels in the other two holes:



Recognising I am tired (and likely to add further unintended features  ::) ) I turned up the three pairs of filing buttons and have abandoned the workshop for the day. So this is where I am leaving it:



Ready to file to shape. After that we can add the slots in two of the bosses.


I am wondering if this casting is actually the correct shape. The original etching does not show it so it is open for interpretation.  :thinking:

Jo
Enjoyment is more important than achievement.

Offline Jo

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Re: Bailey's 1881 Bee
« Reply #72 on: October 15, 2021, 03:32:26 PM »
I've done a bit of filing and then cut a couple of slots:



And even worked out where it goes:



 :wine1:

Jo
Enjoyment is more important than achievement.

Offline propforward

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Re: Bailey's 1881 Bee
« Reply #73 on: October 15, 2021, 03:56:49 PM »
That's a delightfully ornate assembly. It's really shaping up very well.
Stuart

Offline Admiral_dk

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Re: Bailey's 1881 Bee
« Reply #74 on: October 15, 2021, 08:01:08 PM »
Looks like you rectified your blunder nicely  :ThumbsUp:
Great to see the family shot - now I get how it functions  :cheers: