Here is a list of all the postings Michael Cox 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: Latest forum posts|
When the website first started items would remain on the 'Latest Forum Posts' list on the front page for some time. However the site traffic is now large and unless their is a lot of discussion for a particular posting it disappears very quickly of the end of the list and it is easily possible to miss an item of interest. I know it is possible to view the full list but this is not very convenient. Could the list on the home page be made longer?
|Thread: Braided hemp sash cord....|
The waxed cord could be easily dewaxed using white spirit (mineral spirit in the U.S.).
|Thread: DIY hearth|
I have used a mix of 1 part clay (cat litter), 1 part portland cement and 7 parts perlite to make my furnace. It has been in use ,on and off, for several years for melting aluminium. Preparing the mix in the right way is important. For more detail, see:
|Thread: Collet trays|
What struck me about these was that the holes were round and about the same size as an ER32 collet. I bought a pack and when I got home found that they were absolutely perfect for storing ER32 collets as shown here:
|Thread: Mini Lathe Change Gear Specification?|
On my minilathe, a Clark CM300, made by Sieg, the gears are Mod 1 with a 20 degree pressure angle ( see: http://mikesworkshop.weebly.com/change-gear-pressure-angle.html). The gears are 8 mm wide and they are bored 12 mm. The key is 3 mm square. However, the Real Bull minilathes (Chester, Warco, Amadeal), I am told have 4 mm keys.
I hope this helps
|Thread: Machining a concave radius on the end of a round bar|
I do not know what accuracy is required for the radius but I have used a hole saw in the drill press and the piece mounted in the drill vice to do something similar. Very quick, cheap and straightforward.
|Thread: Any Chemists (rust)|
Whilst they are chelating agents oxalic and citric acids are also acids and they will attack steel and etch the surface albeit relatively slowly. However, there are chelating agents, such as sodium EDTA (ethylene diamine tetraacetic acid) which are neutral salts that do not attack steel surfaces but which will chelate and dissolve metal oxides. I suspect that these may be the active ingredient in Evaporust.
I use M-Machine as my main supplier of raw material. I have never had any issues with them and always prompt efficient service. I suspect that, as Brian says, that they may be closed for some reason (holiday, show etc)
|Thread: Westminster Attack 22 March 2017|
I too send my sympathies to all those affected by this event.
|Thread: Grinding wheel supplier recommendation|
I use a company called Abtec, www.abtec4abrasives.com, for abrasive wheels. They have a great selection of products, good prices and will provide knowledgeable advice if asked.
|Thread: Planning a power hacksaw build|
If you look on ebay under "dc power supplies" you will find many cheap 12 V power supplies, mostly from China.
A few years back there was an article in MEW about constructing a power hacksaw and the motor used was a windscreen wiper motor.
|Thread: Preventing Rust|
Some vegetable oils such as coconut oil are nearly 100% saturated and they do not go sticky or thicken in air even after prolonged exposure. Coconut oil in the UK is a solid at normal temperature but liquid where it is produced, in the tropics, hence it is still called an oil.
I have tried it as a cutting fluid on the lathe and for tapping and it seems to work well.
I note that our Oz friends have already mentioned wool fat (aka lanolin). There was a long discussion while back on the Madmodder website about lanolin and the concensus was that it was a very effective rust inhibitor.
|Thread: Working with gauge plate.|
Sorry for the mis-spelling of annealing. I blame the predictive text on my tablet !!!!!
A normal HSS Dormer bit should be fine. The important thing when drilling deep holes in tough materials like gauge plate is to peck away at the hole and never allow material to build up in the drill flutes If material clogs the flutes the torque on the drill increase dramatically and it is likely to break.
Gauge plate cuts and drills easily in the as received appealed condition.
|Thread: Hi From NW UK|
Welcome to the group. I am only down the road to you near Frodsham.
|Thread: Oil coolant pumps - which type of pump|
I too use a windscreen washer pump to pump coolant. Most windscreen washer pumps are gear pumps. They are not designed for continuous use but if run on 6 volts or less rather than 12 volts they seem to run well without getting noticeably hot for extended periods.
There is a write up on my website, see:
|Thread: Cast Steel, Nickel Steel, Phos Bronze?|
Another possibility is that it is Monel, an alloy of copper and nickel. This is similar in appearance to stainless steel.
It is corrosion resistant but any corrosion that does form will be greenish ( both copper and nickel hydrated salts are green).
It was used for special purposes such as chemical plant etc . but most commonly it was used for items in contact with seawater such as propellors and propellor shafts.
|Thread: Hi from Natal,South Africa|
Dave, If I buy hot rolled steel from a model engineering supplier such as M-machine then I find that hydrochloric acid (brick cleaner) will rapidly remove the black oxide scale. However, on occasions, I have bought it in B&Q and the oxide scale is resistant to the acid even if immersed for some time. I suspect that the B&Q material is lacquered to prevent it rusting during transport and display in the store. May be other suppliers also have stock with some sort of protection.
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