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Member postings for Paul Lousick

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

Thread: What size pipe connector?
30/10/2020 05:40:21

The inside diameter of 3/16" is too small for 1/8" BSP which has an 11/32" (8.8mm) drill size for tapping.

Possibly a 1/4" BSB (British Standard Brass) thread which is common on brass fittings. (3/16" = 4.76mm)

BSB uses a Whitworth thread profile with a 55 degree tooth angle. Do not confuse it with an American Cycle thread that has similar dimensions but uses a 60 tooth angle.


bs brass thread.jpg

Thread: Cornish boiler
30/10/2020 05:13:55

Photo of the corrugated wall in the firebox of a Cornish boiler. These boilers are in the town of Ballarat, Victoria in a museum site of an old gold mine. Unfortunately I live in Sydney, NSW and the borders have been closed because of Covid. (and it's only 1000km each way from my home)

Not sure where these boilers where built but many were made at Clyde Engineering in Sydney. Company is long gone and not sure if drawings have been saved.


ballarat boiler.jpg

29/10/2020 21:24:08

Thanks Richard.

Found copies for sale on ebay.


Thread: Budget CNC
28/10/2020 22:05:29

A CNC router for cutting wood is a cheaper option than a mill or lathe. (a quick search found these).



Thread: Cornish boiler
28/10/2020 21:41:42

I did a Google search for Samual Fox which found Samantha Fox, another steamy story surprisewink 2.

A search for Samson Fox was more successful with lots of good articles to read. (his corrugated flue below)


corrugated flue.jpg

Edited By Paul Lousick on 28/10/2020 21:49:23

28/10/2020 09:33:20

Thanks for your replies.

I already have the Model Boilers and Boilermaking book but it only shows a simplified version of the boiler. I would like the boiler to be a true representation of the original.


28/10/2020 05:19:19

Can anyone advise me where I can get detail drawings for a Cornish or Lancashire boiler ? I would like to build one with a 4" - 6" barrel but can scale one down from a larger size.


Thread: Steam pump
26/10/2020 23:14:55

The pump shown does not have a shuttle valve to switch the steam from one end of the piston to the other, but a simple lever that operates a slide valve. The design is similar to the pump supplied from LSM for my Ruston Proctor traction engine.

01 lsm water pump.jpg

A lever, connected to the piston rod operates the slide valve to reverse the flow of steam from one side of the piston to the other. This works OK when the pump is running fast with no restriction on the water outlet but when pumping under pressure (topping up the boiler). and the pump is running slowly, there is not enough inertia to carry the slide valve past the mid point and open the opposite steam port and the pump stops.


Thread: Bending metal
21/10/2020 23:45:12

Bending to a specified length is probably the leaste accurate of the fabrication & machining processes.

The neutral axis for thin sheet metal is approximately in the middle of the sheet but for thicker plate moves closer to the inside edge of the bend. (depends on material properties of the bent part). An approximate position for the neutral axis for 20mm plate is about 1/3 of the distance from the inside edge. (Metal stretches more easily than it compresses)

If you are not accurately calculating the bend dimensions with a formula and the correct metal properties, do a test bend first. Material does not have to be very wide, just the same thickness and type.

Some of the better 3D CAD systems (I use Solidworks) have a sheet metal function that calculates the position of the bend line of the metal sheet in the flat position prior to bending.


Edited By Paul Lousick on 21/10/2020 23:49:10

Thread: Experiences with cordless drills
21/10/2020 23:22:49

One of my old cordless drills was a Bosch 14.1 volt but now have a Ryobi 18v drill which is much more powerful. Had it for more than 5 years with no problems. Gets used regularly every week. Also a Ryobi hammer drill, both of which have a 13mm chuck and enough torque to drill steel. Having 2 batteries is an advantage with cordless drills, charge one while using the other.

With Ryobi (and some other brands) you can purchase the drill, grinder, blower, etc separately, without a battery for half the price of a complete package and share the batteries that you already have.


Thread: Mixed Metals
21/10/2020 22:57:09

Gunmetal is a variety of bronze and formerly used for making ordnance (guns).

Modern admiralty gunmetal is composed of 88 percent copper, 10 percent tin, and 2 percen zinc and is used for gears and bearings that are to be subjected to heavy loads and low speeds. It withstands atmospheric, steam, and seawater corrosion and is suitable for valves, pump parts, and steam fittings.

Thread: Stuart Twin Victoria: Advice & General Questions
20/10/2020 22:43:14

As mentioned, displacement lubricators will only work with steam. When running on air use an airline lubricator available from hardware and compressed air accessory suppliers.


Edited By Paul Lousick on 20/10/2020 22:49:59

Thread: Evolution rage2
19/10/2020 09:29:46

Their not that big. Mine sits on top of a milk crate and can be picked up with one hand and stored away.


19/10/2020 02:40:54

Instead of a chop saw get a small bandsaw. Much better, light weight, less mess and quieter. Do a search here on MEW, lots of articles posted.


bandsaw 2.jpg

Thread: Copper tube for boiler
18/10/2020 09:46:43

Hi Sam,

You have said that you do not intend to get any test certs. Why not build it to a code and approved design ? You may want to display it in public or at a club in the future. Or to family and friends.

A 12" long x 4" dia boiler operating at 45psi is a dangerous toy. It contains approx.2 litres of water at 135 deg C which could cause serious injury if something goes wrong.


Thread: Oil starvation
17/10/2020 21:51:09

Does the level of oil in the lubricator get lower when operating. This would indicate that it is working against steam pressure (unless there is a leak somewhere). Squeak on only one cylinder could indicate a blocked supply line but you said that it is on both cylinders ?. Can you increase the volume of oil from the lubricator ?


Thread: Putting some grip (stippling) on an aluminium drive pulley.
17/10/2020 06:09:04

Use the technique for cutting a worm wheel with a thread tap.



worm wheel.jpg

Thread: Sieg SX3 chuck guard
16/10/2020 12:17:51

Same as Simon " I removed the guard on my SX3 on day one " Can't remember doing anything else. Just left the switch in the guard closed position.


Thread: Square block with round steel balls inside
16/10/2020 09:22:48

I have not seen balls machined in a square box but this is a Youtube link to a Turners Cube, cubes turned inside of cubes


turners cube.jpg

Thread: Advice on Collets
16/10/2020 07:32:16

My lathe and mill both have MT3 spindles and I use an ER collet adaptor for most of my milling operations. Not so much on the lathe but they are much more accurate and smaller than my 3 jaw chuck. (use 4-jaw for precision jobs)

Also very handy to take the collet with job from the lathe and mount in my rotary table which also has a MT3 taper. (Had to purchase a second MT3-ER adaptor to hold the cutters)

I originally purchase the collet adaptor with a minimum set of collet sizes and buy extra sizes as needed.


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