Gallery, Projects and General > Project Logs

2-6-0 Mixed Trafic Tender Locomotive

<< < (5/13) > >>

millwright:
Nice job Stew looking forward to more on this build.

John

sbwhart:
Thanks for your interest

I,ve just completed machining the wheels: I was given a set of casting by a friend, some one had made a start of machining them the outside face had been machined up and the hole for the axle had been machined, some had the back face cleaned up, and all had the back hub face machined, but the hole was too big and the hub face was to thin meaning the rim of the wheel would rub on the frame. A set of unmachined casting will set you back about £200 so it is well worth the effort to recover them.

First job was to fit a bush with a flange to the bores fixed in place with high strength loctite and a small grub screw fitted down the joint.



That should keep it in place.

Next job was to set the wheel up in my four jaw chuck clock the dia of the bush up true and tap the back face of the wheel up against the face of the chuck, to do this I had to put some packing on the jaws in the shape of some small button magnets.





With a boring bar to get every thing running true rouch the bore out and finish off to size with a reamer

Face up the new hub to give the correct stand out, face the rim to the correct thickness and turn the dia for the flange to size.



I have a 300mm old fasion  vernier to measure the rim, the price was right and it does the job



To machine up the front face I used my home made face plate that I made a few uears ago from a disc of steel donated by bluechip, so that I could clamp down on the rim I used two way tape to stick four washers to the plate and I screwed a mandrell into the centre.



Turned the mandrell up for a nice push fit on the bore.



Rough out the out the wheel tred dia and flange thickness



With a radius tool finish off the dia and flange thickness



Using the same mandrell as for the face place mount it on the mill and clock the mill up on it zero the DRO and move the off set for the the crank pin and lock the table up.



Drill and ream for the crank pin:- its important that the off set is exactly the same for each wheel so once you've done one don't move any thing.



Thats it all done



That saved me £ 200

 :D :D :D :D

Stew

DavidA:
Nice wheels,

My procedure for machining the wheels for my 0-6-0 was very similar. The main difference was that I built a jig to hold them and clamped it on the faceplate.

Mine are really only temporary as they don't have the required number of spokes.

Good job; keep it going.

Dave.

sbwhart:
Thanks for your interest Dave you were the only one to reply so I guess your the only one watching.

Any way

Hi Chaps:- if any one does read it.

I've not updated this thread for a while I did get distracted with a couple of other projects and I was a bit put off from updating it because of the problems I was having with photobucket, but now that I've gone add free its making the process far easier.

I have done some work on it and I'm planning too have a intense period of activity on it.

So her's the update

The main driving axles are made fro 3/4" ground mild steel bar, the first job was rough cut them to length.



Face them all off so that they were all exactly the same length.



Using a collett centre drill.



Then between centres turn down the end for a nice close fit in the wheels





I then drill down the ends and cross drilled oiling way this way to oil the bearing all I have to do is squirt oil down the centre of the axle. sorry no pictures of this.

Next turn up and fit the driving pins for the wheels and loctite them in the wheels





Axle boxes Made from a chunk of cast iron

1st job square the chunk up to size



Cut each axle box off from the chunk



In the four jaw face off to length.



Then in the mill I found the centre of each box and put in a centre drill, and using a woble bar centred the box back up in the four jaw and drill out and reamed 3/4"



Then turned up  3/4" mandrell



Transferred  the chuck over onto the spin indexer and milled the groove for a nice slide fit on the frame hornblocks this way every thing will be concentric keeping the axle boxes in line.



Radius off the groove this is so the axles will roll on the track curve and humps and bumps.



This is the axles and axle boxes assembled with the springs.



Then using a quartering jig assemble the wheels:- its important for the wheel coupling that each set of wheels are quartered exactly the same



I post a picture of the wheels in the frame at a later dat.

I'm currently building the pony truck this is being fabricated from laser cut parts.

Stew

AdeV:
Hi Stew,

David's not the only one watching..... I just don't often comment (probably should really).

It's a great looking build so far, surprisingly complicated things, these steam engines! Are you making your own boiler, or getting a commercial one? Oh, and nice fix on those wheels BTW. You make it look and sound so simple, I'd be swearing and cursing after the 2nd one I bet.

Looking forward to the next installment!

Navigation

[0] Message Index

[#] Next page

[*] Previous page