What are you good people using to port ali heads etc.
The usual stone grinding wheels e just clog.

high speed die grinder bit, you can get them from any good engineering supply place, only triuble is they need to run at a high speed so you really need an air powered die grinder

You need a good quality "burr" or a set off, will go off and google a link....

Something like this but do a bit of homework on quality 1st.

Should never use standard grinding wheels on alloy! The best tool for this is a tungsten carbide burr.

[Edited on 27/12/09 by MikeRJ]

Thanks for that...time to do a bit of shopping

quote:

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Originally posted by MikeRJ
Should never use standard grinding wheels on alloy! The best tool for this is a tungsten carbide burr.

[Edited on 27/12/09 by MikeRJ]

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I have a 110 v die grinder that is so much better to use than an air powered tool . Tungsten bit is what you need

I use one THESE in the drill, works a treat on ali and steel.

quote:

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Originally posted by rusty nuts
I have a 110 v die grinder that is so much better to use than an air powered tool . Tungsten bit is what you need

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Very much like the one I have but I only paid £20 off the bay , already had the transformer

just ported my zetec head, £8 tongsten round ended rotary burr, £10 flexi-drive (keep it greased though) and standard drill, plus a couple of 20/25mm flap wheels £4 done the trick nicely


[Edited on 27/12/09 by will121]

And I found gear oil to be a great lubricant when porting aluminum.

quote:

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Originally posted by thepest
And I found gear oil to be a great lubricant when porting aluminum.

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Parafin is recommended

Somewhere in Internet I read that you could use regular metal grinding discs/stones for aluminiumm if you apply them to a block of beeswax, and keep doing it regularly.

http://www.practicalmachinist.com/vb/sitemap/index.php/index.php/grinding-wheel-selection-t157557.html

***Disclaimer: Do the above at your own risk***

One thing I know for sure, is that you can cut longer with the Tungsten Carbide tips if you apply regular chalk on the grooves as this prevents cuttings from piling up.
My $ 0.02 MXP