Author Topic: Potty Lads and Dads Mill Engine  (Read 42325 times)

Offline Stilldrillin

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Re: Potty Lads and Dads Mill Engine
« Reply #15 on: April 17, 2013, 11:11:43 AM »
Nicely done Stew!   :ThumbsUp:

A matching pair of covers, for the minimum of effort........  :praise2:

David D
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline b.lindsey

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Re: Potty Lads and Dads Mill Engine
« Reply #16 on: April 17, 2013, 11:27:35 AM »
Still looking good Stew!!  Will be looking forward to each and every update :)

Bill

Offline sbwhart

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Re: Potty Lads and Dads Mill Engine
« Reply #17 on: April 18, 2013, 06:02:57 PM »
Cheers Guys

On with the cylinder, I had a bit of 31.5 mm diameter ally in my stash a little undersize, but if I didn't clean up the OD I recon it will do the job, so faced a chuck off to lenth, then drilled and bored it out 16mm ID



The using the four jaw with the cylinder longwise face off one side for valve chest.



Turn it round 90 check that its square and face another side off for the base





Over onto the drill and drill the ports



The spotting off the valve chest drill and tap M2



Then from the end face drill down 3mm into the inlet port.



The use the end covers to spot through for drilling and tapping M3 for the end cover fixings.



Thats the cylinder done



Time for a quick assembly of parts to see how its looking



MMMMMMMMMMMMMMM  not bad

Stew
A little bit of clearance never got in the way

Offline tvoght

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Re: Potty Lads and Dads Mill Engine
« Reply #18 on: April 18, 2013, 06:13:16 PM »
Looking very well indeed.

--TIm

Offline b.lindsey

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Re: Potty Lads and Dads Mill Engine
« Reply #19 on: April 18, 2013, 07:11:40 PM »
Stew, how is or how will the base of the cylinder be attached to the cylinder? You are sure making some nice progress on it!!

Bill


Offline sbwhart

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Re: Potty Lads and Dads Mill Engine
« Reply #20 on: April 18, 2013, 07:34:03 PM »
I've put two m3 tapped holes in the cylinder to attache the base to it.

Stew
A little bit of clearance never got in the way

Offline NickG

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Potty Lads and Dads Mill Engine
« Reply #21 on: April 18, 2013, 09:02:00 PM »
Nice 1 Stew, think that's proved that cylinder design is straight forward to make. No lapping either due to piston valve. Easier to get a sufficient seal with  I would guess than a slide valve.

Offline sbwhart

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Re: Potty Lads and Dads Mill Engine
« Reply #22 on: April 19, 2013, 03:07:17 PM »
Cheers Nick

The boss has been working today standing in for a sick teacher, so had the day all to myself in the shed, almost done an 8 hrs shift so when i've done this i'm going to have a nap.

Made the stuffing box for the valve rod

Drilling out the top hat bit



Spot drilling through into the valve body for to fix the valve guide.



Shaping up thr valve guide



Turing up the valve from a bit of 6mm stainless.



These are the valve bits



Also turned up the piston and piston rod guid this is the only pic I took.



And the bits lose assembled



Stew

A little bit of clearance never got in the way

Offline b.lindsey

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Re: Potty Lads and Dads Mill Engine
« Reply #23 on: April 19, 2013, 03:15:41 PM »
Very nice progress Stew....amazing what 8 hours of quiet time in the shop will do :)  Hope you will get more shop time over the weekend.

Bill

Offline NickG

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Potty Lads and Dads Mill Engine
« Reply #24 on: April 19, 2013, 04:36:59 PM »
Looks good Stew, does it make appropriate whooshing noises?!

Offline sbwhart

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Re: Potty Lads and Dads Mill Engine
« Reply #25 on: April 19, 2013, 04:40:56 PM »
Yes it does Nick and if I put my fingers over the right holes I can even get it to fart

   :naughty::lolb: :Jester:

Stew
A little bit of clearance never got in the way

Offline NickG

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Potty Lads and Dads Mill Engine
« Reply #26 on: April 19, 2013, 08:26:38 PM »
Just the job!

Offline Bearcar1

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Re: Potty Lads and Dads Mill Engine
« Reply #27 on: April 19, 2013, 09:25:38 PM »
Looks real good Stew.  :ThumbsUp:  You're making me relaxed just watching.  :)  Your creations are always worth the cost of a ticket to watch, thanks.


BC1
Jim

Offline Alan Haisley

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Re: Potty Lads and Dads Mill Engine
« Reply #28 on: April 20, 2013, 01:33:13 AM »
Stew,
Looking at these two pictures, I can't tell how you opened up the 3mm into the inlet port.
Then from the end face drill down 3mm into the inlet port.

Thats the cylinder done


Was there some file work after drilling the 3mm hole to the port or is there something else I missed?
Alan

Offline sbwhart

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Re: Potty Lads and Dads Mill Engine
« Reply #29 on: April 20, 2013, 07:33:35 AM »
Alan

Yes I just used a good old square file to open up into the cylinder

Thanks for your interest

Stew
A little bit of clearance never got in the way

 

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