Threaded rod.

[martinw]

Originally Posted by Carel Martin, they are on the Duco Site you referred to: http://www.huco.com/products.asp?p=true&cat=390 Or still more unobtainnuttable? Carel

Dear Carel,

Thanks for pointing me in the right direction. I'll find out how much they cost tomorrow and let you know.

Best wishes

Martin

[martinw]

Originally Posted by martinw Dear Carel, Thanks for pointing me in the right direction. I'll find out how much they cost tomorrow and let you know.

Hello Carel,

Not good news I'm afraid to say.

Each 12mm steel nut costs 3.40 UK pounds. Each 14mm one costs 4.30 UK pounds. Then add the tax. If you are making a three axis machine and you need 4 nuts per axis to lock the screws on to the thrust bearing inner races, you a going to have to spend about 50 to 60 UK pounds for a dozen nuts.

You can get 1/2"-10 Acme nuts for 99 cents in the US. That's why acme looks pretty attractive.

Regards

Martin

[Carel]

Industrial parts don't come cheap. Normally they look puzzled if you ask how much a part cost. On the other hand you have to ask (if you have a lathe), what the cost of raw material plus labour is to produce this. Then 4 pounds can be cheap. Look if you can optimize your design by eliminating the nuts. A bearing locked by nuts on a threaded rod is not optimal. If you machine the ends, you don't need the nuts.

Carel.

[martinw]

Hello Carel,

I know that nuts are not ideal in this application but they have the virtue of simplicity. I do not have a lathe. Getting a comercial workshop to machine the ends would be eye-wateringly expensive. I'm going to find out how much the shipping costs would be for acme spindles and nuts sourced from the US.

Thanks for your help.

Best wishes

Martin

[Carel]

What happened to England, the founder of the industrial age? Not a lathe in sight and only available at exotic rates? Flying in parts from the USA, where your ancestors went? England: make the lathe and mill again a domestic appliance as it was and put yourself on the map again!

Carel

[martinw]

Originally Posted by Carel What happened to England, the founder of the industrial age?

Hello Carel,

Part of the answer to that question is that we now live in rip-off Europe and have a monstrous shambling crew of Brussels criminals to support...

Shall I go on?

Best wishes

Martin