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Member postings for Journeyman

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

Thread: Stirling hot air engine.
09/08/2019 15:34:48

James Rizzo in his book "Modelling Stirling and Hot Air Engines" describes an interesting method of making a stainless steel displacer cylinder. The cylinder is relieved at the outer end so that the diameter is slightly larger than the cylinder bore using a V shaped boring bar. A plate the diameter of the relieved section has its edge finished to a V section rather than just parallel. The plate is a tight fit in the recess and is pushed in and the edge of the cylinder (tube) is gently hammered inwards to make the plate captive. The cylinder is filled overnight with a salt solution, just ordinary table salt, and apparently the tight fit and the slight chemical action seals the displacer end-cap in place.

Have not tried this method so cannot report on it's effectiveness.

John

Thread: 3 phase - radio puzzle
30/07/2019 09:24:52

For a non-technical solution you could try swapping the radios over. You probably can't hear the workshop one with the lathe running anyway. Sounds like the filter in the VFD might be faulty.

John

Thread: Up and over door seal
30/07/2019 09:09:11

I've got one of these on my door works but the threshold needs to be flat *** Screwfix *** you can also get a rubber strip that fixes to the floor and provides a stop for the door to butt up to. Loads on the interweb a quick Google will show plenty...

John

Edited By Journeyman on 30/07/2019 09:09:53

Thread: How to cut metric threads on an imperial lathe and vice versa.
24/07/2019 11:33:04

Well I am no expert but I do not belive it will work for all thread pitches. Had a problem on my WM250 (3mm pitch leadscrew) trying to cut an M12 thread, I came up with this:

The screw-cutting thread indicator dial meshes with the leadscrew via a 30 tooth gear. To get the indicator dial to rotate once the carriage has to move 90mm (number of teeth x leadscrew pitch). Only those metric pitches that divide exactly into 90 will be able to use the dial when screw-cutting. Thus pitches of:-
0.5, 0.6, 1.0, 1.25, 1.5, 2.0, 2.5 and 3 will work, pitches of 0.7, 0.8 and 1.75 won′t work.
Replacing the 30 tooth gear with a 28 tooth gear would work for the missing pitches but not for all. With a 28 tooth gear the carriage has to move 84mm for a full turn of the indicator and 84 is divisible by 0.7, 0.8, and 1.75. So either change the gear, make an indicator that has both gears or just leave the leadscrew engaged and reverse the lathe.

I also made a flip-up tool holder which solves the problem.

John

Thread: Myford Vice for Vertical Slide
13/07/2019 10:48:06

The small radius in the corner is probably for stress relief, I would call it a fillet! You could fix a secondary jaw in place if you can drill a couple of holes through the fixed jaw (or even glue it) permanent packing. Many vices have replaceable jaws, you could even make a set with horizontal and vertical grooves for holding round stock.

John

Thread: Work Shop Talk - Tour of my Work Shop
09/07/2019 15:47:56
Posted by Rik Shaw on 09/07/2019 14:17:22:

2. What method to use to make a LINK which would make them viewable on here?

Rik, apart from using the forums own somewhat clunky image system you could use your BlogSpot website (assuming it is still current) I don't use BlogSpot but I assume it has similar facilities to WordPress for posting and editing images. You could crate a new post or page and just link to that perhaps.

John

Thread: A puzzling design in Nurnberg museum
09/07/2019 09:26:57
Posted by Nigel Graham 2 on 09/07/2019 09:16:23:

Were they charged with steam, or with water at boiler pressure and temperature?

According to Wikipedia they were charged with superheated water under pressure. As the steam is used and pressure drops, the superheated water boils, replacing the used steam.

John

Thread: Work Shop Talk - Tour of my Work Shop
09/07/2019 08:36:44

You can have a look round my workshop if you wish. I did a *** Workshop Tour *** a few years ago. Hasn't changed much, just more accumulated stuff filling up the corners and collecting dust!

John

Thread: Thread Bare
02/07/2019 10:38:45
Posted by Brian Oldford on 02/07/2019 08:05:47:

I agree far better not to hold the die-holder under power, but in fairness at least the OD of the holder is smooth so less likely to cause injury.

Unlike the tang of the file he uses to put a chamfer on the end of the rod! V. dangerous.

On 2nd thoughts after closer examination there is a handle on the file. I withdraw my complaintblush

John

Edited By Journeyman on 02/07/2019 10:56:47

Thread: A puzzling design in Nurnberg museum
28/06/2019 19:33:26

Sound similar to a loco I spotted in the Budapest Railway Museum some time ago. This is a fireless 0-4-0 tank loco 91,001 (UIC B-f2t). Technically it probably isn’t a tank engine as it has no tank or firebox, just a large steam receiver. Designed for working in hazardous environments, the receiver was just filled from the factory steam main as required. Built by Lokomotivfabrik Krauss & Co. of Linz am Donau, Austria in 1915.

90001loco.jpg

The manufacturer might be a place to start.

John

Thread: Warco Mini Lathe
23/06/2019 09:40:43
Posted by Martin Hamilton 1 on 22/06/2019 22:04:04:

Jason are you sure your WM280 has these gib adjusting screws, that diagram you show is for the mini lathes which does have these. I didn't think the WM240, WM250 & WM280 lathes had these gibs & adjusting screws under the saddle. They certainly didn't have any adjusters on these lathes the last time i was in Warco's showroom a few months ago, they also don't show these gibs & adjusters in the Warco parts manual for these machines ?

Well my WM250 certainly has a rear gib strip with five adjusting screws and locknuts and I can verify that they are somewhat awkward to adjust. The photo below is at a very strange angle but you can see the gib and the screws.

wm250reargib.jpg

There are also guide blocks at the front of the saddle but these have no adjustment, I tightened mine up by rubbing the top edge of the blocks on wet and dry. The right hand front block also forms part of the rudimentary saddle clamp and the whole thing was left loose to enable it to move when tightened with the clamp screw on top of the saddle. I modified the clamp arrangement see My Web Page and ended up with a working saddle clamp and a well fitted front guide.

John

Edited By Journeyman on 23/06/2019 09:48:10

Thread: Mini Lathe footprint dimensions and will it slide
14/06/2019 10:47:12

I'd go with Ron's sliding shelf. Use an offcut of 40mm kitchen worktop, heavy duty sliders and hinge a sheet of plastic to the rear of the shelf then as it is pulled out the plastic can lean back to form a shield to prevent swarf going down the back. Bolt the lathe to the shelf, even on a permanent mooring you may get rocked or nudged which could displace the lathe.

John

Thread: Thomas from Hornby
14/06/2019 09:53:13

Top of the thread has gone walkabout! First post is Zane asking where he can get a triangular screwdriver to fix his sons Thomas loco. Neils answer is as above and Zane has replied to say he never thought of a allen key.

I tried to paste it in from a list of Zane's posts but the formatting goes to pot.

thomasthread.jpg

Managed to paste it as an image.

John

Edited By Journeyman on 14/06/2019 10:04:33

Thread: New Lathe addition to workshop
13/06/2019 09:35:32

Probably Chinese, looks to be pretty well identical to my WM 250 just a different colour.

wm2501.jpg

Good lathe should work very well for you, happy turning...

John

Thread: Another "What is it?"
10/06/2019 16:46:13

Wilmonda seem to make specialist tools for the motor trade ( see ***HERE*** ). No idea what this one is for though?

John

Edited By Journeyman on 10/06/2019 16:47:49

Thread: Reference books
09/06/2019 09:09:40

The Zeus data tables are useful (and greaseproof) from Amazon for £5.40 or there is the Metalworkers Data Book by Harold Hall, one of the Workshop Practice Series, also from Amazon.

The Engineers Black Book is quite useful if you can find one at a sensible price some one on Amazon selling a used copy for £70 !

John

Edited By Journeyman on 09/06/2019 09:14:43

Thread: Connecting a pair of motor controllers.
04/06/2019 10:19:02

I'd go for a bigger controller this is rated at 60A continuous from Amazon.co.uk

controller.jpg

Only £25.00 - Might do the job?

John

Edit: forgot the price!

Edited By Journeyman on 04/06/2019 10:26:53

Thread: Quicksilver
04/06/2019 09:12:52

Still got a couple of mercury arc rectifiers in use at the Kempton Steam Museum:

mercuryarc.jpg

Well worth a visit, but make sure they are open before travelling.

John

Edited By Journeyman on 04/06/2019 09:13:36

Thread: Making a Silicone Soldering Brush
31/05/2019 10:11:37

You beat me to it! Yes plenty of silicone brushes about.

pastrybrush.jpg

This from ***HERE***

John

Thread: Colchester Lathe Factory
31/05/2019 09:45:01
Posted by Hopper on 31/05/2019 03:49:34:

Just a matter of money. If a new Myford is 5,000 quid, what price a shiny new Colchester?

Don't know about that Colchester but a new Harrison M300 which is about the same spec will cost around £15,000 (+VAT) which if you say it quickly doesn't sound too bad. Colchester, Harrison and Clausing are all part of the 600 group and all their new lathes seem to sport the Colchester livery and logo.

John

Edited By Journeyman on 31/05/2019 09:54:05

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