Scooterotica

going to have a go at matching the casings to a RB25 barrel. is a carbide bit the way to go? and do they come in the right size for a dremel?
thanks Simon

A dremmel is too slow for a job like this. You want to be pushing the gasket face down to about 3-4mm around the edges, so I'd go in with a big burr in an electric drill. Something with a diameter of at least 10mm. By all means tidy it up with a dremmel, but make some big initial cuts with a big burr.

If you're unsure, experiment on some scrap ali before you start work on the barrel or casings.

Actually unless you use the correct hi-speed alluminium cutters I'd say a dremel is actually too fast to use with the cutters you can buy in this size. Ally likes to be cut slower as the shards wont meld and weld themselves into the cutter.
The larger bit diameter as Martin suggests is a good idea..you can use a drill but use one with a variable, lockable speed trigger. And at least to start , use the slower speeds.

Have to say I do usually start with a 6mm burr in an airtool but I've also done loads of transfers with a dremmel type tool and never had problems. You can always slow the speed down.
It does pay to invest in some proper carbide burrs-ebay is usually pretty good.
Also use lots of parrafin to stop the burrs clogging.

Nice post.
I am thinking too to start to match transfers in my Indian std stage4 and i never do this job first.
What accessories of Dremel you use to do this job.
http://www.dremeleurope.com/dremelocs-u ... cat_id=479
You use different tools to work in the engine block, iron cylinder, ally cylinder,....?

That's a very helpful tim from Knowledge, when I did mine on my Mugello I used the dremel and went through all the grinding whells and emery wheels as they became clogged with ally veryquickly. The best result was with the little router bits that came with it but it took ages and was dificult to get a smooth surface.

I saw the burrs that Martin mentioned in B&Q the other day, a set of 3 wood and ally for around £8, ideal for removing the bulk of the material. Final polish with an emery wheel in the dremel.

thanks for the tips guys!

I did mine yesterday, for the RB25. I use a HSS bit that is used for cutting tiles, ( I think) this roughs it out very well, no clogging, and then finished off with emery paper ones.
Be carfull not to go too thin on the thickness on the casing, its easy to get carried away

coaster wrote:That's a very helpful tip from Knowledge, when I did mine on my Mugello I used the dremel and went through all the grinding whells and emery wheels as they became clogged with ally veryquickly.

Those grinding wheels are useless. Proper burrs made of high speed steel are the way to go.

There is a range of Dremmel-like cutters from a company called "Hi-Tool" or Nu-Tools" (something like that) which have much longer shanks than Dremmel, and you can get right down the trannies (from the bottom) with these. Al is right about ebay; there are plenty of choice on there, but you want a reasonable diameter so that the cutting edge achieves some speed and torque.

i have to say that the tile cutting bit for the dremmel is top notch for ally eating and doesnt clog up 4 me, leaves it a tad rough tho but if you want something to look at then porn is the way to go, the sanding wheels are also good but as martin says the grining stone wheels are utter shite 4 ally