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Hi all and welcome to TheWoodHaven2 brought into the 21st Century, kicking and screaming! We all have Alasdair to thank for the vast bulk of the heavy lifting to get us here, no more so than me because he's taken away a huge burden of responsibility from my shoulders and brought us to this new shiny home, with all your previous content (hopefully) still intact! Please peruse and feed back. There is still plenty to do, like changing the colour scheme, adding the banner graphic, tweaking the odd setting here and there so I have added a new thread in the 'Technical Issues, Bugs and Feature Requests' forum for you to add any issues you find, any missing settings or just anything you'd like to see added/removed from the feature set that Xenforo offers. We will get to everything over the coming weeks so please be patient, but add anything at all to the thread I mention above and we promise to get to them over the next few days/weeks/months. In the meantime, please enjoy!
Rob Roy loco
- Thread starter Dalboy
- Start date
NickM
Old Oak
This is great work. I think you may have said already (I’m too lazy to read back), but are you making your own boiler?
NickM
Old Oak
Dalboy":3n4accc8 said:
That’s a good plan. My dad made the chassis and running gear of a loco many years but foundered with the boiler. I’m sure you’ll succeed though.
Since my last post I have been working on the axle boxes first job was to mill the slot for them to slide in the horns this was done while it was in one piece, These were then cut and milled to length a little filing with some needle files to help them slide as they were a little to close a fit.
Next job was to drill and ream for the axles and also drill two holes in each for the springs. I also marked each one along with the horns keeping them all in the right place.
In the last picture just below the bush there are two holes well I will hold my hand up as the bottom one was in the wrong place but being something that will not be visible I decided to leave it rather than have to remake the two frames again. This hole takes the brake assembly along with the two holes to the left and right of the horns and at the same height so a lever will cover those holes
Next job was to drill and ream for the axles and also drill two holes in each for the springs. I also marked each one along with the horns keeping them all in the right place.
In the last picture just below the bush there are two holes well I will hold my hand up as the bottom one was in the wrong place but being something that will not be visible I decided to leave it rather than have to remake the two frames again. This hole takes the brake assembly along with the two holes to the left and right of the horns and at the same height so a lever will cover those holes
CHJ":2xcjk0pv said:
Thank you Chas. I do tend to work out the days work around the house/garden and workshop most times the afternoon is workshop time. Each part is planned the evening before so that I am happy on how parts need to be machined/made, I use the same principle as I use on the wooden models I make
Six Hornstays made and drilled then the horns drilled and tapped followed by shortening the fixing screws as I only had some which were too long these are 5BA bolts
The centre support rod was cut and drilled either end then tapped 6BA so I took the opportunity to do a dry fit. Hopefully will be able to get the surface plate out and get everything squared up and the holes drilled and tapped to hold the buffer beams in.
The centre support rod was cut and drilled either end then tapped 6BA so I took the opportunity to do a dry fit. Hopefully will be able to get the surface plate out and get everything squared up and the holes drilled and tapped to hold the buffer beams in.
NickM
Old Oak
It’s really starting to take shape. It looks super.
Slow progress I have managed to get the chassis fully assembled once happy that it does not need taking apart again I will go around all of the screw fittings and put some loctite on them. I have turned one of the stretchers as I had it upside down in the picture.
Thank you NickM missed your reply.
I am now half way through turning the wheels and boy O boy don't you get black hands turning cast iron and then spend 1/2hour cleaning the lathe after a days session(Photos to follow when they are done)
I spent a small amount of time making a mandrel for this little chuck as it only had a 3/8" thread not good to hold it in a collet now it is great for those very small bits
I managed to pop out and buy these small boring bars for a good price and they were local new inserts ordered and a torx to undo them
Thank you NickM missed your reply.
I am now half way through turning the wheels and boy O boy don't you get black hands turning cast iron and then spend 1/2hour cleaning the lathe after a days session(Photos to follow when they are done)
I spent a small amount of time making a mandrel for this little chuck as it only had a 3/8" thread not good to hold it in a collet now it is great for those very small bits
I managed to pop out and buy these small boring bars for a good price and they were local new inserts ordered and a torx to undo them
SamQ aka Ah! Q!
Old Oak
Loving the pictures. In the real thing, the brakes are permanently 'on' unless a vacuum is pulled; does that hold for your model please?
SamQ aka Ah! Q!":22y4510z said:
The brakes are very rarely used on models except to stop it rolling when you are stationary and on this one they are operated by a screw system. I have not yet seen a model with a vac system on the scales I have looked at. Possibly on the larger scales.
Have been working on the wheels this is taking a bit of time so far 4 days but that is not solid as I have the garden as well as other jobs.
Started with 6 rough cast wheels which are very good quality as far as casting go no blow holes either
This is what it looks like all that needs doing now is to make a mandrel and finish turning the outer rims
Well that is three down before the next stage three more to go then I will complete the rims on all of them as once the mandrel is turned I do not want to loose the setting of it while turning the rims.
Started with 6 rough cast wheels which are very good quality as far as casting go no blow holes either
This is what it looks like all that needs doing now is to make a mandrel and finish turning the outer rims
Well that is three down before the next stage three more to go then I will complete the rims on all of them as once the mandrel is turned I do not want to loose the setting of it while turning the rims.
Great progress Derek You might find this interesting, Locomotive Valve Gear
CHJ":2lkhrgv3 said:
All the eccentrics are on the central axle between the frames they will be the next job after the axles. When the axles are assembled the axle blocks need to be fitted before the wheels and the eccentrics only on the centre set. I will be making a jig to aid in quartering the sets when I get there
OH bugger it managed to mess up one of the wheels every thing turn on it except the tread went to drill the axle hole and walking to the drill bit shelf thinking to myself must get it to 7/16" yes you guessed it instead of picking the drill smaller so I could put a 7/16" reamer through I grabbed the 7/16" bit and drilled the hole ans as you all will know a drill bit will always drill oversize.
The air was blue for me doing a stupid thing so have just now ordered a new casting.
Yes I could have bored slightly over size and turn the axle to match but I am the sort of person that want it just right(maybe not perfect but the best I can do).
Well at least I could go into the garden and mow the lawn as well as pot on some plants on top of that plant some other bits and pieces we both brought yesterday at the garden centre. I am sure the garden centre cost more than bit for my loco.
The air was blue for me doing a stupid thing so have just now ordered a new casting.
Yes I could have bored slightly over size and turn the axle to match but I am the sort of person that want it just right(maybe not perfect but the best I can do).
Well at least I could go into the garden and mow the lawn as well as pot on some plants on top of that plant some other bits and pieces we both brought yesterday at the garden centre. I am sure the garden centre cost more than bit for my loco.
NickM
Old Oak
That’s a shame. Is repairing it such a problem? I’ve had a few woodworking screw ups and I’ve been able to live with them. They’re a reminder to me not to be such a muppet next time! If it will be largely invisible then I could definitely live with it. I’d like the fact I know it’s not perfect but that nobody else does!! You’ll have to go with whatever you’re comfortable with though…
Thank you both I certainly would not be happy with a repair of any kind. I am the same when I make the wooden models I have made in the past if a part goes wrong in the bin it end up and a new part made.
I would always know it was there which will bother me
I would always know it was there which will bother me
SamQ aka Ah! Q!
Old Oak
Thanks Derek. Bad luck on the 7/16"th hole; it could happen to a bishop.
As promised photos of the now 6 wheels ready for the turning of the treads as well as a photo of them along side of the chassis which is all assembled.
Mandrel completed and the first wheel mounted I will make a start on them tomorrow.
This was not all the work today as I did get some more work in the garden which was just silly jobs as the bulk of the garden is complete
Mandrel completed and the first wheel mounted I will make a start on them tomorrow.
This was not all the work today as I did get some more work in the garden which was just silly jobs as the bulk of the garden is complete
More gardening this morning just odd jobs but takes some time.
Then into the workshop and drilled holes between the spokes so that I could get a small burr in to clean them out, First photo of all the holes drilled this was done to all six wheels.
Then onto cleaning the holes out only did one as it was hard on the hands only 5 more to do. Please note the holes for the crankpins have not yet been done as I am waiting for a reamer to do them
Then into the workshop and drilled holes between the spokes so that I could get a small burr in to clean them out, First photo of all the holes drilled this was done to all six wheels.
Then onto cleaning the holes out only did one as it was hard on the hands only 5 more to do. Please note the holes for the crankpins have not yet been done as I am waiting for a reamer to do them
Well the wheels are complete with all the webs cleaned out and the crankpin holes drilled and reamed. I was coming out of the workshop with black hands and face where I wiped it without thinking.
I made a simple jig to aid in drilling the crankpin holes which I did on the milling machine two drill bits and the reamer to get them to a size needed. Now to make the crankpins three different designs and sizes as well as axles. Even then I will not be able to fix them together as I also need to make other parts to fit the axles before the wheels can be pressed together and quartered. That will required another jig to get them correct.
I made a simple jig to aid in drilling the crankpin holes which I did on the milling machine two drill bits and the reamer to get them to a size needed. Now to make the crankpins three different designs and sizes as well as axles. Even then I will not be able to fix them together as I also need to make other parts to fit the axles before the wheels can be pressed together and quartered. That will required another jig to get them correct.
Cabinetman
Sequoia
- Joined
- Oct 11, 2020
- Messages
- 5,185
- Reaction score
- 968
- Location
- Lincolnshire Wolds + Massachusetts
- Name
- Ian
Just realised the scale of the beast you’re making!
Probably wrong but to me the balancing weight on those wheels looks a bit big compared to the mass of the centre lug, have you tried them for balance on an axle? Ian
Probably wrong but to me the balancing weight on those wheels looks a bit big compared to the mass of the centre lug, have you tried them for balance on an axle? Ian
DaveL
Old Oak
The balance weight is not just for the centre mass of the wheel, the crank pin and connecting rod also adds weight.Cabinetman":q406y976 said:
Outstanding progress Derek, don't forget to label your working Jigs and keep them safe as a set.
Long after project completion they will have value, especially for someone attempting the project with more limited skills, equipment or time.
Long after project completion they will have value, especially for someone attempting the project with more limited skills, equipment or time.
DaveL":1sq61etj said:
Lots of things to take into consideration. as you have stated
wallace":1sq61etj said:
There are plenty of plans out there it all depends on what you like from small stationary type engines, locos and even traction engines. something simple to start with as there are various kits out there where you can buy castings. It all depends on the equipment you have and any experience you have.
I may have picked a project that is a little more advanced for a total novice like myself as I am only just started in model engineering especially working with metals instead of wood which many of the models I have built in the pass.
CHJ":1sq61etj said:
You can't get anymore limited experience than I have :lol: :lol: :lol: learning as I go but have done a lot of research before starting this journey.
I am lucky that I was able to buy the larger machines in one go but still buying the little nick naks that go along with it as and when needed.
And as for time I seem to have plenty of that with all the things I try to fit into a day
Limited experience in Metal Machining you might have, but you have a lifetime of experience and demonstratively a very high level of craft skill that many can only aspire to and will rarely achieve.Dalboy":rva9gq7r said:
More done on the wheels started the crank pins by turning the end that is pressed into the wheel and cutting each one to just over the length needed. I managed to complete two and fit them.
The photos show the two complete one with a pin showing the machined end and the last a photo of the four still to complete. I had a total of three failures where I machine off 2 thou too much so on the rest I made them 1 thou over and used wet and dry for the very last bit. The two I have completed are a nice press fit
The photos show the two complete one with a pin showing the machined end and the last a photo of the four still to complete. I had a total of three failures where I machine off 2 thou too much so on the rest I made them 1 thou over and used wet and dry for the very last bit. The two I have completed are a nice press fit
