Lynne,
As you are working with brass, you should consider un-coated end mills with two flutes, ideally with a high helix flute angle. Reasons – in simple without getting technical – Non-ferrous material such as brass fails to perform well with coated end mills. Two flute reduces the chance of the end mill clogging, and with a high helix angle, swarf is expelled more easily.
Having said the above, you could use the cheap and chearful TiN coated or any other, with variable results, which may or may not meet your requirements.
Where you buy from is up to you. As Piero said, eBay from China may be good enough for you, as it is for him.
I would however correct Piero in his understanding about who ARC buy from. The cheap and cheerful TiN coated endmills which we sell are sourced from a specific maker in China, and the premium end mills which we sell are purchased from a specific premium end mill maker, with full material traceability, who make for well-known world brands.
It took ARC over eight years 'to be allowed' and 'to be in a position' to buy from the premium maker, who services a very limited number of overseas buyers, as its order books from within the Chinese premium end industrial user buyers is very strong. Delivery times to us from them are between six to eight months… Keeping this in mind, we constantly monitor and look into our crystal ball for enlightenment about how much stock we should bring in. We often get this wrong as we go out of stock on some sizes sooner then others. The positives are that demands for the premium range has grown.
Whilst ebay may be fine for the hobby user, if ARC wants to grow its business, we have to maintain a certain level of consistency, if we are to be taken seriously by the growing number of industrial users who buy from us. We are happy to service both sectors, and we are grateful for the support from all concerned. We are especially grateful to the hobby users who have helped us in the development process of the premium endmill range.
Piero is also mistaken about pricing. Our profit margins on these products are much lower then he thinks. In many cases, our buying costs are higher than those being offered on ebay. Reasons are covered by a combination of comments made on this thread by others, as well as on this thread, which talks about the black market economy, on which I would not like to elaborate. All I can confirm that our 'premium' makers product will not come onto ebay, especially because most Chinese ebay sellers cannot buy from them, and if they could, they would not buy from this maker, because they would not be able to sell them and make a profit on them at the current ebay selling prices. The only way a Chinese ebay seller could buy and sell a premium endmill sourced from our maker, is if he/she stole them, and/or he/she sold them at a loss to launder criminal money.
Conclusion: One should buy from where ever one feels happy.
Ketan at ARC.