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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: The Workshop Progress thread 2018
20/02/2018 10:21:52

My current project is Ray Hasbrouk's No 3 Rocking Valve Engine. This is a fairly simple engine with not a lot of moving features so I decided to reduce it's size. I did this by converting the imperial dimensions on the drawing to metric using a 15mm to the inch conversion factor.

After a set back involving a small BA tap and a ruined cylinder I have made a couple of design changes to allow the use of larger threads than the reduction in size called for and now have a completed cylinder assembly.

Hasbrouck cylinder assy 1.jpg

Hasbrouck cylinder assy 2.jpg

Jim

18/02/2018 10:57:54

Swing arms look good George. yes I think that's probably the trickiest bit.

Jim

Thread: First project
12/02/2018 19:13:06

Ian

I can recommend Steve's wobbler design as a first project, it was the one I started on.

First Attempt 1

First Attempt 2

There is a lot of good guidance with the drawings if your skills are a bit rusty and if you are up to speed already it will be good practice to get familiar with your new lathe. As no castings are involved, if you make a mistake there is no delay in making a new part and it will be cheaper than replacing a casting. Plus you will hopefully end up with some bits of stock materials which always come in handy.

My second engine was a Stuart 10V which I did with no problems because I had a fair knowledge of my machines and how various metals behaved by then. I also had a few more bits of tooling having completed a couple of other small projects.

Jim

Edited By Jim Nic on 12/02/2018 19:14:37

Thread: The Workshop Progress thread 2018
02/02/2018 14:11:12

Know just how you feel George. The cylinder block pictured in my last post is now in the scrap bin after I broke a 10BA tap in it. crying 2 All part of life's rich pattern

Jim

Thread: Knee or Head
28/01/2018 11:31:50

I have a WM16 which is very similar to the WM18 under discussion. When taking a milling cut I don't lower the head to increase the depth of cut. I set the initial position of the head and lock it then use the quill fine feed mechanism and digital readout to lower the cutting tool.

Jim

Thread: The Workshop Progress thread 2018
28/01/2018 11:21:05

With Stew Hart's Popcorn engine finished -

Popcorn finished 2.jpg

it was time to make a start on Ray HasBrouck's No3 Rocking Valve engine. I purchased the book containing the drawings a while ago and yesterday I gathered the main materials to make a start (there may be a few bits left over at the end).

Hasbrouck materials.jpg

It is a small, fairly straightforward design and shouldn't pose any difficulty (famous last words!), I've even bought in a flywheel. I chose this engine because I dont have such a valve mechanism in my collection.

Today I've made a start on the cylinder block.

Hasbrouck cylinder 1.jpg

Jim

Thread: Simple Mill Engine - Stewart Hart ME.4460 - Part CP11
27/01/2018 20:56:46

That's looking very tidy Jim. Do she run yet?

Jim

Thread: Spot the fake
16/01/2018 10:41:05

In these days of convincing cheaply made copies of expensive products, it would seem that if owning a Mitutoyo caliper is important to you, it would be wise not to try and get it on the cheap but to deal with a reputable supplier. You will undoubtedly have to pay more than if you took a chance with a "bargain" but that, surely, is the cost of having high grade equipment. wink (I make no judgement on whether Mitutoyo calipers are better enough than Aldi specials to be worth the extra.)

Jim

Thread: The Workshop Progress thread 2018
12/01/2018 17:37:51

At long last the Stew Hart's Popcorn engine is complete.

I ran into a couple of difficulties when reassembling it after stripping and painting; I discovered that somehow I had managed to bend the piston rod, which is a short piece of 4mm dia steel, and when I remade it the M4 thread I put on the end using a brand new thread die was seriously horrible and barely engaged with the crosshead. The bronze ball whistle valve which previously held air very well now leaks and will need to be sorted, hopefully with the simple replacement with a nitrile ball.

Anyway, here's the evidence:

popcorn finished 1.jpg

popcorn finished 2.jpg

popcorn finished 6.jpg

And for those of you not too bored yet, a video:

Jim

05/01/2018 19:42:54

That turned out well Jason. As always an impressive result in double quick time.

Jim

Thread: What did you do Today 2018
04/01/2018 16:24:00

As happened with the motor on my mill, you seem to have one completely worn brush and one less so. You should be able to measure the size you need and resort to good old e-bay where you will find many sizes of carbon brush for cheap money. Watch out that the springy end is the correct size and shape for your motor and then the brush itself can be easily and gently filed to size if necessary.

Jim

04/01/2018 12:23:30

Brian

Crikey! I didn't imagine Sinclair sold enough of the things tokeep a factory going for more than an hour or 2. Still, at least it was made in UK and every little helped.

Jim

04/01/2018 10:34:58

I understood that C5 motors were Electrolux components from their washing machine range.

I resisted buying one despite the hype; as well as being slow, positively dangerous in traffic, limited in range and having little weather protection, you needed to be "Billy No Mates" to drive one. (And if you weren't at the start you soon would be.) sad

Jim

Edited By Jim Nic on 04/01/2018 10:35:32

Thread: Cutting oil -
04/01/2018 10:20:25

I believe Duck Oil is similar to WD40 in being a carrier fluid with a grease component which I use as a quick spray on the working parts of my machines after use to keep corrosion at bay in my damp garage workshop. It has been successful at this for 6 years.

For tapping I use CT 90 tapping fluid available from EKP Supplies in the UK (amongst other suppliers, I expect). After breaking numerous small and expensive taps, usually while turning backwards to clear the swarf, while using the cheap and readily to hand oils I tried CT90 and have had no breakages since. I use it in all metals as apart from easing the thread cutting it sticks the swarf to the tap making it easier to clean.  Although it looks expensive, a drop goes a long way and  I expect the bottle I have will see me out.

Jim

 

Edited By Jim Nic on 04/01/2018 10:23:41

Thread: Centre Finder Query
02/01/2018 16:56:38

I find accurately picking up scribed marking easy enough especially using a magnifying glass. However, unless you are already at the correct location dropping the needle point into a centre pop mark can move the needle and require re-centering it before you can have another go.

Jim

Thread: Baldwin Gas Mechanical Cab Started
26/12/2017 15:46:36

Ouch ! crying

Jim

Thread: 1947 Jepson engine
21/12/2017 14:23:27

A good little runner, well done Geoff.

A word of caution. I found that when I used 3 in 1 oil in my engine bearings it turned gummy after a couple of months of not running. I cleaned it out to restore free movement and now use 10W30 car oil. 3 in 1's effect on O ring piston seals was even worse. sad

Jim

Thread: What's the strangest project you've ever seen in an old ME or MEW?
19/12/2017 14:09:49

It's a gas turbine engine starter cartridge. When initiated the contents burnt relatively slowly and the resulting gases were directed into a small geared turbine which engaged with the main engine, spinning it up to self sustaining speed. Certainly used on some marks of Canberra aircraft and I seem to recall also on some Hunters.

Jim

Thread: The Workshop Progress Thread (2017)
15/12/2017 12:38:04

Hi George

First off I bought a very low grade drill press off e-bay for £20 specifically for this job and with the intention of selling it again after I'd used it (although I'll probably keep it because after a bit of fettling it's OK for butchering the brown stuff).

engine turning 1.jpg

Then I made an abrasive tool from a piece steel rod, a piece of 20mm dowel and a pad of soft leather cut from one of Mrs Jim's unused belts (I think it was unused, it will be now!)

engine turning 2.jpg

After some experiments with fine and coarse valve grinding paste I settled on the fine and, after clamping a fence to the drill table, away I went.

Jim

 

 

Edited By Jim Nic on 15/12/2017 12:44:04

Thread: What Did You Do Today (2017)
14/12/2017 16:22:16

Muzzer

Or a Honda CRV? I have one and I'm very pleased with it.

Jim

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