Member postings for Ron Laden

Thanks Jason that is really helpful.

Think I will go with an aluminium piston and try a pair of shallow V oil grooves.

The drawing gives an option of either steel or aluminium for the flywheel as shown on the drawing, I was surprised as I thought it would be steel/cast iron and not aluminium or is alu easier to drive on a small engine.

Regarding running I am about to get a new airbrush which comes as a set with a compressor (reservoir type) which is rated up to 30 psi, I am hoping that will be ok for driving the engine.

Ron

Geoff, I had a look at your album some nice work there, did the engine run well..?

I also see that J.D.W has changed the design of the flywheel, assuming yours was as per the book.

Ron

Thanks Jason, appreciated.

Ron

Thanks guys for the advice.

Neil, I did wonder about the reamed finish for the cylinder but it is what the drawing listed, I can quite easily bore it.

Ron

Hi Russell

Looking at the drawing again the 1.5mm is actually the groove width with a depth of 1,25mm but there is no detail of the O ring size. Even if 1.5mm was available I can now see it would be too tight.

p.s. Looking on Ebay Silicone 1.5mm rings are listed but I wonder if they are actually 1.6mm..?

Thanks

Ron

Edited By Ron Laden on 23/01/2020 09:31:09

I am taking a couple of weeks off the class 22, I need a machining fix I havnt done any work on the lathe or mill since before Christmas. I was going to make some tooling but then came across a number of online drawings for stationary engines.

I didnt want anything complex or long winded so looked for something simple and found a Julius de Waal drawing of the Muncaster Simple Oscillating Engine, which although quite simple I do like the look of it .

So I thought I would have a go and try and get it out of the material I have on the shelf, it will be 95% as per the drawing but maybe one or two cosmetic changes.

Having gone through the drawing I am ok with the detail but I have a question re the cylinder/piston. The cylinder is brass with a bore of 16mm (reamed) and the piston is 16mm close fit but what does close fit equate to with a piston/cylinder..? Also I dont have bronze for the piston, I was thinking brass..?

The piston has a 1.5mm O ring fitted into a 13.5mm diameter groove which leaves the ring protruding 0.25mm which seems a lot but will the ring compress enough to be ok..? Also there is no detail on the O ring material would it be silicone..?

Thanks Ron

Having had a mini lathe I think a couple of points worth considering is to go for one with a 100mm chuck, 400mm between centres and a 500 watt motor (ideally brushless direct drive)

If I was buying one now it is what I would aim for.

Very impressed, she has a pleasant voice, speaks clearly and is obviously very skilled and a good teacher. Much better than a lot of teaching videos I have watched and excellent for the beginner. I have watched 2 or 3 of her videos and picked up some good tips and some good tool projects, will have to watch some more.

That's impressive Andrew especially with it in 3mm steel and having shallow flanges, can't have been that easy to do.

Looks very good.

I read yesterday that the production of the original MAPP gas ceased in 2008.

The bonus of CNC Jason that would have been a lot of work on a manual. What is the make up of MAPP that makes it different to propane and why no longer available..?

Edited By Ron Laden on 15/01/2020 07:04:59

Neil, unfortunately I dont have an answer to your problem other than to suggest you check the drive train from motor through to the chuck. It sounds as if the work you were doing at the time you lost drive was light duty and assuming there are no faults within the drive assy its strange that the motor drive pulley has failed yet again, it could be a faulty pulley of course but I wonder..? Have you checked the motor pulley to see if that is where the problem is..?

When I had my CJ18 I stalled it twice whilst parting off and the second stall broke the plastic high/low spindle drive gears inside the head. It was quite some force as it broke off some teeth and split the main body of the gears and yet the small plastic motor drive pulley was fine including the moulded in key.

Have a good look at the motor pulley and the rest of the drive to see if you can identify any problems which could cause the motor pulley to fail (if it has of course) it could be that the problem is elsewhere.

Edited By Ron Laden on 14/01/2020 16:12:34

I took a gamble and bought a cheap Chinese set of 4 radius edge cutters, cost £8 for the set 1/8, 1/4, 3/8 and 1/2 inch rads.

The 20mm thick loco body cab/end plates have radiused edges which I was planning to cut and shape by hand but then thought it better and more accurate if I could machine to the basic shape and then hand finish. I didnt want anything expensive as the cutters will be seldom used if at all.

I know router cutters are run at high speed and I only have a top speed on the mill of 2500 so that was the main worry, would they work at the lower speed..? Need not have worried as they work and cut just fine, tried some test cuts on a piece of Pine, unknown hardwood and MDF and they left a very clean finish even on the MDF which surprised me. So in this instance £8 well spent.

1/2 inch cutter below.

Very nice, I am ok with the paint job, quite like it in fact makes a change from reds, greens and the like.I can only go by the pictures but I wouldnt say it looks lifeless in fact quite the opposite it has areas of reflected light and highlights, looks a very clean finish, well to me at least.

Nice work Jason, interesting, I picked up on the hand turning have never tried that will have to give it a go. I am guessing that the tool support bar is fixed to the tool post. The oil channel built into the nameplate is a neat idea I like that.

I have a 80mm ARC versatile which I am really pleased with, great value for money. I have the swivel base removed but I have used it a couple of times. You certainly need to consider the size of vice, surprising how big a lump they are relative to the jaw size.

I am not upset just a bit of over reaction on my part I guess. I watched quite a bit of footage on the current situation yesterday and it is tragic beyond words just heartbreaking. Sorry Neil I didn't appreciate the humour at that time.

I am surprised at you Neil, with you a chartered environmentalist and qualified ecologist I think the above is in bad taste and not funny at all if that is what its meant to be.

Ron

Yes it is a wonderful series Michael but now tinged with a feeling of "how it use to be" as a lot of what you see in the programmes will now be gone and some gone forever. I heard a news report today which said that of the millions of animals which have perished in the fires there will be some species which will in the long term never recover and face extinction.

Jason, I know it says so in the Preston video but the flywheel rim is a piece cut from a 7 inch diameter steel tube am I understanding that correctly, if so it must have been quite a thick walled tube..?