By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Jim Nic

Here is a list of all the postings Jim Nic has made in our forums. Click on a thread name to jump to the thread.

Thread: Forum Video Size
27/12/2018 11:29:12

The vid worked for me Ron. All you have to do now is work out how to turn the web address of it into a clickable link wink

Jim

Thread: Stockport Vacuum Engine
16/12/2018 12:11:47

Nice looking result Mike, well done.

Jim

Thread: Sourcing
11/12/2018 21:28:29

I would be very wary of cheap or free bits of metal. For use on our hobby machines free cutting metals are the best materials to start with then harder and tougher types can be utilisd when experience is built up.

Regardless of experience and machine it is always best to know what metal you are dealing with, there are some very tough machining resistant steels about.

Best, in my opinion, to bite the bullet and purchase known materials from known sources.

Jim

Thread: What did you do Today 2018
04/12/2018 15:09:07

Thanks Jeff and George.

I blacked the parts by heating to red and then dunking (a technical term) in engine oil till cooled. Best done in the open as lots of smoke results and probably a fire risk. As you probably are aware used car engine oil is carcinogenic, although I'm not sure how much you have to drink before there is a real risk, so I use clean oil. It works for me and a part I blacked 8 years ago still retains its colour so I'm happy to use the process.

Jim

04/12/2018 12:18:01

A small thing, but a win's a win.

Since I got my Rotary Table about 6 years ago I've been meaning to make a couple of clamping blocks for it. As a break from my current engine project, today I got them done.

rt clamp 1.jpg

rt clamp 2.jpg

Jim

Thread: Type of builds on this site
04/12/2018 09:26:04

I would welcome an artillery build log. Although artillery is not my thing I am always interested in how others approach modelling problems and engineered models of any subject are interesting to me.

Jim

Thread: What did you do Today 2018
27/11/2018 12:40:12

Actually yesterday, I received the laser cut return connecting rods in stainless steel for my Overcrank Engine. These rods are in effect the crosshead but they work around the crankshaft thus shortening the engine. They were produced for me by Model Engineers Laser from a paper drawing.

return conn rods.jpg

I could have made them myself but producing 4 seemed like a chore so I took the easy route.

I understand that Malcolm at Model Engineers Laser runs it as a retirement project and he tells me that unfortunately his service will no longer be available after the end of 2020. That is a great pity as his service is excellent in all respects and he is willing to work from a paper drawing.

Jim

20/11/2018 16:23:43

Yesterday I managed to break the mounting spigot of my DTI.

Today I spent some time on t'internetty trying to find a replacement spare. After a fruitless hour or so I got fed up and made one.

dti spigot 1.jpg

On the left the broken cast ali original, on the right the replacement from a bit of steel out of the bits and bobs drawer.

dti spigot 2.jpg

That should keep me going for a year or two.

Jim

Thread: The Workshop Progress thread 2018
23/10/2018 19:51:29

One step forward and 2 steps back on the Overcrank. I made the base, just a piece of ali sheet with 6 round holes for the crank bearing supports and 4 elongated holes for the cylinder block. What could possibly go wrong?

base 2.jpg

When I offered up the cylinder to the base I found out. The holes in the cylinder base were incorrectly positioned and although I could have used them the cylinder would have been 90 deg out and pointing acrtoss the base instead of along it. The correct positions are marked out in the picture below.

base 4.jpg

"Oh, pooh sticks." I said, and went for a lie down while I considered whether to scrap the base or the cylinder block. After a while when calm was restored I came up with a simple plan and plugged the M4 holes in the cylinder base and redrilled them in the correct place.

base 6.jpg

After that I made the crankshaft bearing supports. Here is the base with one shaped support and 1 blank (the third is set up on the milling machine).

base 7.jpg

For some time now I have been muttering within earshot of the Domestic Authority that I could do with somebody to talk to while I'm busy making important stuff in my "playroom" as she calls it. I have let it be known that a dog would probably fit the bill despite her lifelong objection to domestic animals making a mess in her nice clean house.

Well to day she gave in and came home with my new pet. Meet Doug:

doug.jpg

I'm not sure she is taking this matter seriously.

Jim

Thread: Given the Elbow
23/10/2018 10:07:11

Not bad indeed Eric. A very attractive flywheel and the rest of the engine looks good too. As you say, all that's left to do is get it running and post a video.wink

Jim

Thread: What did you do Today 2018
18/10/2018 20:27:01

Really nice result George. If Robbo is right and the domestic authority insists on replacing it with a new one, give me a call and I'll be round smartish to collect it. wink

Jim

Thread: The Workshop Progress thread 2018
15/10/2018 12:28:10

I'm not a fan of hot air engines, but I have to admire the workmanship and appearance of the finished article.

Nice one Jason.

Jim

Thread: loctite fixing
14/10/2018 15:06:11

Not sure what you used when you say "retainer". Loctite is best at fixing shafts and bearings into holes and when correctly used for that purpose is difficult to shift.

I often use the adhesive method for workholding and use cyanoacrylate - instant glue. Ensure your surfaces are clean, and oil free, apply the glue sparingly and with pressure. I usually leave the assembly for at least 12 hours before machining.

To disassemble, moderate heat with a paint stripper gun and a light tap usually does the trick.

Jim

Thread: Train In a Bottle
06/10/2018 19:25:09

And all this time I thought your Horwich Crab was a bit bigger than that wink

Jim

Thread: The Workshop Progress thread 2018
06/10/2018 13:48:12

Not a lot to show on the Overcrank since my last post on 12 Sep but here is a "family shot" of the components of the largely completed cylinder block.

cylinder block 15.jpg

And the assembled bits.

cylinder block 16.jpg

I'm not quite sure how best to proceed so to give me some thinking time I will make the aluminium sheet base and then probably the 3 main bearing supports.

Jim

Thread: WARCO Reversing Problem
05/10/2018 16:04:39

My 8 year old WM240 does an indicated 1200 forward and 600 in reverse. I agree that there's probably nowt wrong with yours.

Jim

Thread: Alternative Heat Source
02/10/2018 09:44:42

Other than an old bicycle lamp, what did you have in mind to use it for?

Jim

Thread: Unusual Oscillating Cylinder Locomotive
30/09/2018 10:28:54

I've no informationto add, but it looks to be a well made contraption. It would be interesting to see it running some day.

Jim

Thread: The Workshop Progress thread 2018
28/09/2018 16:12:23

Thanks Jason, I hadn't spotted that. Pricey but probably good for a couple of small eccentric sheaves I have to solder up so I'll get some at the Midlands Show and give it a go.

Jim

28/09/2018 14:45:28

Hi George

Thanks for the reply. I have seen low temperature solder paste before but I was hoping you had found silver solder paste.

For similar applications I have used silver solder foil supplied by CuP Alloys which is placed, with some flux, between larger surface to be joined before heating. It works well but is expensive.

Jim

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
Advertise With Us
Warco
ChesterUK
TRANSWAVE Converters
Ausee.com.au
Eccentric July 5 2018
Eccentric Engineering
Meridienne oct 2019
emcomachinetools
Allendale Electronics
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest