See previous posts about Dewhurst switches. Not all motors are reversible

**LINK**

When rotating the job on a rotary table, cut in a conventional milling direction (against the work) and not climb milling because the cutter will pull the work and rotate the table, making the cutter dig in to take up any back-lash in the gears. Not only cause a rough finish but can also damage the gear teeth. (smashed the worm wheel on my RT by doing this)

Paul

Colin, there is a conflict in your post.

Tha drawing has a 10mm rad hole but the text refers to a 10mm dia hole. Either way will not effect the shape of the outside.

A CAD drawing for layouts like this is much easier than trying to calculate dimensions and angles. If machining this on a roatary table, knowing the angle to start and stop is also an advantage.

Paul.

Edited By Paul Lousick on 08/08/2021 14:53:22

Lots of inexpensive ph meters on ebay, advertised for testing swimming pool water. Also used for testing boiler water instead of using litmus paper to determe amount of treatment required.

They also make good adjustable spanners/wrenches

I had to cut 1/2" ACME threads on the park prake for my traction engine. The male thread was screw cut on the lathe but the female thread in the nut, made with a tap.

The nut was made from brass and gave me a physical work-out while cutting it, using a 2 ft long tap handle. I would not attempt to try and cut by hand it in steel.

Paul

As you say, "you gets what you pay for" but all should come with some kind of warranty and if it does not work, send it back and get a refund. Check the return policy, some are free and some you have to pay postage. (Ebay and Paypal have return money policies. May take some time but you should get it back)

Paul.

Not sure what happened to the link Alan but it is the same as the one that you found on Youtube

**LINK**

https://www.youtube.com/watch?v=eBMn7VLquRo&list=PLaHqxzL9GeUUtGt4eGpFGdC-t4DE-oEME

There are another 7 videos of the pump/engine conversion.

Paul

Edited By Paul Lousick on 30/07/2021 07:28:32

Lots of examples on Google and Youtube

Like these:

**LINK**

**LINK**

Hot dip galvanizing after your modifications is is the best option but is expensive. The trailer. has to be chemically cleaned to removes organic contaminants such as dirt, paint, grease, and oil from the metal. Then pickled in acid which removes mill scale and rust (oxides) from the steel. Then dipped into a flux bath which prevents oxidation of the metal prior to entering the galvanizing bath and also aids the galvanizing reaction in developing the hot-dip galvanized coating.

I recently modified my standard box trailer (already hot dip galvanized) into a tilt trailer and considered having the new parts galvanized but cold gal coated instead because of the price.

Paul

Paint ground surfaces/welds, etc with cold galvanizing paint and use galvanized fittings. Cold gal is not as wear resistant as hot dip but gives good rust prevention.

My local hardware store sell hydrochloric acid in 500ml (and larger) bottles. Swimming pool supply shops also sell it.

Muriatic acid is a form of hydrochloric acid. But while hydrochloric acid contains only HCI molecules, muriatic acid is made up of HCI molecules as well as impurities such as iron. (used as a flux when soft slldering galvanizes steel)

Paul

Dozens to choose from on the internet.

Do a Google search. eg. **LINK**

When you open the posts and look at the titles, they contain apostrophes and inverted commas. You may need the correct character set on your comuter to display them. OK for some but not all. Probably should not use punctuation marks and special characters when naming a post.

New Chuck won’t screw on

Centre Drill Leaves a “Pip” - Sometimes

Edited By Paul Lousick on 25/07/2021 05:35:27

Same on my PC. Windows 7, Firefox

Many times, I have had to raise the head after a machining operation and did not want to lose my datum position, so definitely a dovetail column and not a round one.

Paul

As the tap/stud is protruding above the surface, an option is to place a nut over it and plug weld the nut onto the tap. Then use the nut to un scew the tap. The heat from welding may also loosen the tap slightly.

Que ?????

If you had read the previous posts, I am refering to locked cabinets inside the workshop, not tools left outside.

Paul.

Faber Castell still make fibreglass erasor pens which I used to used many moons ago when I was a draftsman on a drawing board. Used to use them for modifying ink drawings. Still remember getting itchy hands after brushing the broken fibres with my hand.

Paul.