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: water hammer|
We even put one of the hammer arresters on the outlet pipe of the pump on our traction engine to soften the thumping action of the piston. Made it a lot quieter.
Another option is to use an anti-hammer tap washer. These are spring loaded and close more slowly. Other types are available from plumbing and hardware stores.
Edited By Paul Lousick on 13/02/2020 00:22:47
It is not uncommon for metal pipes in a plumbing system to bang loudly when a faucet is shut off suddenly, or when a water-using appliance such as a washing machine or dishwasher shuts off the water intake abruptly. It is not normally caused by air in the pipes.
The condition is commonly known as water hammer. The technical term is hydraulic shock, and it occurs when water stops or changes directions suddenly. The banging you hear is caused by the shock wave that causes plumbing pipes to move and strike against one another or against wooden framing members. In addition to being annoying, water hammer can be so forceful that it can break pipes or loosen plumbing joints.
An explanation on Youtube shown here: **LINK**
|Thread: Log in|
I normally can automatically log in to the site but occasionaly (like this time), I had to do it manually. But I only have to enter my email addres and not my password. I use MEW daily and this only happens after many days. (have to check how many days apart. maybe its a monthly thing ??)
|Thread: Tapping drill sizes?|
The dimension specified for British Standard Pipe (BSP) is not the outside diameter of the pipe but refers to a nominal size of the bore. 3/8" BSP pipe has an OD of 0. 5886" - 0.6560" (14.95mm - 16.66mm).
Pipe is available with different wall thicknesses specified by a schedule. For calculating the volume of fluid that the pipe can transfer, the inside diameter is important and a nominal bore size is specified. A standard OD is important so that the pipe can mate with elbow, tees, etc.
Tube on the otherhand is specified by its OD and a wall thickness and not by its bore.
(one of the arguments that I had with a popular supplier of boiler injectors who advertised them as having 1/4" pipe fittings. When it was delivered it had a 1/4" OD tube fittings and was too small for the application)
Edited By Paul Lousick on 11/02/2020 11:55:10
|Thread: 3D Scanning, Anyone?|
Before I retired from work we were building maintenance platforms at an airport to service an A380 Airbus and employed a commercial company to do a 3D scan (not cheap) because we could not purchase an accurate 3D model of the plane. No 3D printing but used the scanned model in a CAD package to design parts.
|Thread: What would I use a Plasma Cutter For|
I also have one of the cheap Stick/Tig/Plasma units and find it good value for what you pay. Have had it for a couple of years now and mainly use it for Tig welding. Stick welding is much better than my old transformer unit.
I have replaced the Tig gun with a better one as I had trouble getting the consumable tips and shields.
|Thread: My (bad) carbide grinding setup|
Better than nothing. If it works, use it.
|Thread: Painting fittings|
Depends how you are riveting. Hot or cold. If hot riveting the paint will burn. I primed and painted the spokes and rims of my traction engine wheels prior to assembly to prevent rusting. Assembly was done at a later date. The setting of rivets on the spokes where done cold. (5/16" dia rivets were set with 3 different shaped snaps, requireing a maximum press force of 15 tons). The assembled wheels then grit blasted prior to final painting.
|Thread: Possible machine hoist?|
Lots of talk about CE markings and not being covered by insurance which is true. BUT like many posts on this forum, we have wanderred away from the original purpose of this post.which was a way of lifting a chuck or rotary table onto the mill table.
These truck hoists are designed to lift in excess of 400kg. A rotary table or chuck (for home use) would be less than 40kg. The safety factor of it failing is very low. Is it any more dangerous than making your own hoist or using a block and tackle system in your workshop ?
Personaly, I would not use it, not because it would be unsafe but because it would take up valuable floor space and prefer a ceiling mounted rail or swing type hoist which has a moving trolley. The truck hoist can only lift and swing in an arc. There is no axial movement to position the load after lifting.
|Thread: Vertical slide fitment|
An idea for a simple vertical slide attachment in an article in Popular Mechanics magazine published in 1945.
|Thread: Myford ML2 Adventure|
This similar to my old Southbend lathe but there would have been a cover over the gears which are missing in the photo.
|Thread: How do I change the "default" lever angle on my Verdict DTI?|
Im not familiar with the Verdict but on all of the ones that I have the lever has a friction grip and simply twisted to the angle required.
|Thread: Hoist Frame|
If you are using one of the column mounted hoists as shown, there should not be a problem with lifting 100kg at 1.5m.
The bending moment of listed load at the extended position (neglecting electric hoist) = 1.1m x 200kg = 220 kgm. Your bending moment at 1500mm = 1.5m x 100kg = 150kgm. Therefore OK because less than before.
|Thread: Digital verniers|
The Aldi verniers are good value for everyday use and they come with a 12 month waranty. Make sure that you keep it (most people do not) and take it back for a replacement.
|Thread: Tuna Can Blower|
Very neat Stuart, and a basic answer to "Why do they call steam raising blowers when they suck ? "
Called blowers because the air is pushed (blown) by the centrifugal action in this case, causing a reduction in air pressure on the inside of the rotor. The atmospheric pressure pushes air into this space to achieve equilibrium.
|Thread: My First Stationary Engine|
Brass will work. The Muncaster engine published in ME even had an aluminium piston. Aluminium is often used for the piston in full size engines to reduce the mass. Heavy pistons cause the engines to rock as they move back and forward. Brass is OK in steam applications but will corrode (de zincify) when in water.
|Thread: Steel for cutter?|
Have you searched on ebay. Found these for using on an angle grinder.
|Thread: Fly press weights.|
One of the options given was to to use concrete but if you would like the weight to be heavier for its size, add lead or steel to the mix.
One of the companies which I worked for manufactured industrial cranes like the ones on building sites but much bigger and the cost of cast iron or steel for the counter weights was expensive. The weights were more than 20 tonnes each. They were made by casting concrete using steel as the aggregate. Mainly from the discarded pieces remaining after punching parts from steel plate. The smaller the parts, the better because you can pack in a higer proportion of steel. For the flypress weight you could use any small metal objects, nuts, bolts, lead fishing weights, etc. Use concrete, polyester resin, builders joint filler or other bonding agent to hold the casting together.. The mould coukd be simply a childs plastic ball.
Exercise weights are made from similar cheap cast iron as used in sash window weights. Sometimes it is OK to machine but Murphys Law says that most of the time it is crap. But they are cheap and good if used in the right application. Car brake discs are better souce of machinable cast iron if it is a suitable size to suit the application.
"no good without some form of pressure regulation"
Most shop compressors come with a reducing valve which can output air to a lower pressure
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