Shed Matters 3

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Stanley
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Re: Shed Matters 3

Post by Stanley » 27 Mar 2019, 10:28

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I left the lathe set up for boring the day before yesterday so it was easy to start this morning. If you remember I checked the alignment of Mrs Harrison when I finished Newton's engine and it showed this morning. The tip of that drill is stuck out a long way from the tail stock and I was pleased when it entered the bore dead square.

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Here's where the piece of half inch steel came in. I wanted to extend the centre so I had room for the top slide when it was set up for the taper. I went back to the first cannon to remind me of the taper, it was 1.5 degrees.

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As you can see I had to have a rethink and give the cutter more stick out. This was as far as the travel of the top slide would take me.

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No problem moving along a bit to complete the cut.

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Next a form tool to give the end of the barrel a bit of character.

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The extension bar was a good fit, I had to grab it with the Mole grips so I could knock it out.

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The last cut was a countersink on the muzzle. Then I had a clean up, harvested the brass chips and vacuumed the carpet, those brass chips fly all over the place! Not a bad morning......
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Re: Shed Matters 3

Post by Stanley » 28 Mar 2019, 09:22

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The fore end is finished and before I put the barrel back in the chuck I looked for the point of balance so I can make sure it balances nicely when I put the trunnions in.

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Now we have to get a bit of shape into the back end of the barrel.

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I found one of Johnny's old cast steel form tools that fits the bill. Cast steel is fine for brass, a lot of modern turners forget that and it has an advantage, it's easier to get a very keen edge on cast steel with ordinary oilstones.

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Once I had the major shape cut, back into the form tool box for a suitable cutter for the next stage. Over the years you'll find you make a lot of special form tools, if you keep them together it can save a lot of time in subsequent jobs.

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This little tool was just right.

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Here's where we are at knocking off time, trunnions and touchhole next!
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Re: Shed Matters 3

Post by Stanley » 30 Mar 2019, 08:35

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This was the size of it this morning lads. I got the chop saw out and cut the timbers for the carriage. Not much but a step forwards.....
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Re: Shed Matters 3

Post by Stanley » 01 Apr 2019, 08:10

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Today is woodworking again. I want to get the carriage laced up and varnished so it has plenty of time to dry properly before I work on it again. I still have some metal cutting to do. So first thing was to put a new sheet of 220 grit sandpaper in the orbital sander and use it mounted in the vice to give all the component parts a good sanding ready for the varnish.

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A short time afterwards.... I have it sanded and screwed together. The hook on the back is to hold it while I am varnishing it and hang it up afterwards well out of the way.

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Knocking off time, everything tidied up, my varnish brush cleaned and the carriage is hung up out of the way and can take its time drying and more importantly, allowing the varnish plenty of time to set. Not my favourite sort of job but there you are, it has to be done.
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Re: Shed Matters 3

Post by Stanley » 06 Apr 2019, 09:15

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The start in the shed was a bit different this morning. One of the nose pieces fell off my new pair of glasses and I replaced them with two better ones from an old pair of glasses which had proper metal inserts instead of being moulded plastic. So nice to be able to do a repair like that and not pay out a fortune. The screws were incredibly tiny, hence the tweezers.

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After a bit of measuring and a root in the brass ends box I was ready for trunnions and touch hole.

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Drilling the touch hole.

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Knocking off time and would you believe it, despite all my balancing and measuring it's still nose heavy!
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Re: Shed Matters 3

Post by PanBiker » 06 Apr 2019, 09:33

Could it stand to have a bit shaved of the nose or re-profiled to get it balanced?
Ian

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Re: Shed Matters 3

Post by Stanley » 07 Apr 2019, 03:00

No Ian, I have the proportions right. I was surprised because it defies reason. I must be wrong to say that of course because it can't tell a lie, it just nods forward, end of story!
I'll live with it, it's only an ornament!
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Re: Shed Matters 3

Post by plaques » 07 Apr 2019, 07:08

How much weight would you have to remove from the barrel to get it to balance? I was thinking that you could open the bore up but leave the nose end as it is to maintain appearance but take the weight from inside.

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Re: Shed Matters 3

Post by Stanley » 08 Apr 2019, 02:57

Theoretically that would work P but I shall not bother. If I make another I'll put the trunnions at the balancing point of the raw stock. i.e. Mid way. I shall make the trunnion mounts a bit tight...... Just like I did with Kev's.
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Re: Shed Matters 3

Post by chinatyke » 08 Apr 2019, 03:51

Is it because you've taken some metal out when you drilled the touch hole? The touch hole seems quite a way back from the trunnions.

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Re: Shed Matters 3

Post by Stanley » 08 Apr 2019, 05:20

No, far bigger imbalance than that and anyway out of balance before that was done.
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Re: Shed Matters 3

Post by Stanley » 08 Apr 2019, 09:10

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Today is axles..... I'm going to nake them the same way I did Kev's, crossways across the carriage because that way they strengthen the structure. So I needed some half inch square stock... I'm not well endowed with this so I had to go searching. I have a piece of 3/4" square mild steel but that's too heavy. I found a piece of 1/2" key steel but it wasn't long enough to get two pieces long enough to turn down to circular axles for the wheels. An executive decision was needed! I decided to use silver steel for the axles and will sink a suitable piece in each end of both the axles.

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It's against my religion of course but I cut the two lengths using the hacksaw. You'll notice that I have given up economising, I have enough Eclipse all hard blades to discard them when they are dull!

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I squared the ends and ended up with 2 X 3 5/8" axles. I had put the four jaw on Mrs Harrison. I could have squared the stock in the 3 jaw of course but it wouldn't have been on centre and I shall need that when I drill for the stub axles.

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Into the silver steel stock. I hadn't got any 1/4" but had some that's a shade over 17/64" which will do. I cut 2 X 2" pieces. (I think it's 3.8mm actually.)

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I sorted out my 17/64" drill and sharpened it and just to be certain laid the axles out on the carriage.... I make mistakes in my measuring these days and have to keep checking. That was enough for this morning.....
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Re: Shed Matters 3

Post by Stanley » 09 Apr 2019, 09:19

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It's quite amazing how easy it is to fritter time away if you aren't organised. I had a good example this morning. I'm sure you all spotted the mistake I made yesterday.... I only had two axles for four wheels. So this morning I went looking for some matching stock to make two more and that's where the time went, I haven't got any more! So I had to have a rethink, I found some 1/4" silver steel in another treasure chest and cut 4 axles from it, squared them and chamfered the edges. This didn't take the time up, it was the search for something I hadn't got!

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A bit later I had drilled all the axles and Loctited the stub axles in place. I can do the final adjustments on length Tomorrow. Not a brilliant morning but a small step forwards....
One thing that went through my mind as I worked on Mrs Harrison. She is probably over 60 years old and is still perfect, tight and accurate. How many things do you buy today that are going to be as durable as that?
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Re: Shed Matters 3

Post by Stanley » 10 Apr 2019, 09:06

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I was in the shed at 07:30 and something caught my eye. In order to understand this first pic you need the second....

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The tin you see above has been on this shelf holding these frequently used item ever since I set the shed up over twenty years ago and it has always been a bit of a pain. It struck me this morning that I could save space on the bench and make more space on this shelf at the same time. Little improvements.....

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First job was to cut all the stub axles to the same size, refinish the ends in the lathe and then....

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I ground a small flat on the end of each axle to facilitate drilling the holes for the cotters.

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The flat made it possible to eyeball the location of the small hole in each axle.

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Last job was some more measuring and drilling for the holes for the screws that will fix the axles in place. Next job is making and fitting the wheels and that's more work for Mrs Harrison so I knocked off. Nice morning with a little bit more progress.
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Re: Shed Matters 3

Post by Stanley » 12 Apr 2019, 03:46

Sorry for the hiatus. Domestic matters have taken over. I decided that all bedding, curtains and nets have to be washed! Just as important as the Shed I am afraid. I shall be back!
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