The Shop > Tools
Ripper end mills
Will_D:
Please let us know how you get on with them.
Phody:
John, I've been using 'Ripper' cutters for some time and just love them. I purchase 'SOMTA' cutter because that's what my local tool merchants stocks(I thinks SOMTA was Dormer - South Africa). They come in two types 'fine tooth' and 'course tooth'. On small milling machines of 1/2 hp or less I use the fine tooth ones. I find that the best results are when you never apply a cut deeper than the ripper teeth. If you do go deeper the cutter load goes up dramatically. The surface finish is one of personal choice - I quite like it. But if you don't just skim over it with a convention end mill. One big advantage is that you don't get those needle sharp shards of steel in you fingers.
Good Luck.
PS Most of my milling is done on a Dore-Westbury Mill and by using fine tooth rippers and a 2MT collet, the results have been a bid improvement.
John Rudd:
Thanks for the info....not sure if these are coarse or fine?
Not used them yet..... :dremel:
trapper:
The coarse ones are actually "rippers" and the finner ones are "hyfeed" both are good tools to have in your arsnal the rippers are for roughing and remove a lot of stock quickly leaving a not so good finish,But thats what they are for roughing then finish with an e.mill to obtain the finish/size yoiu want-excellent if you wanted to do say a repair welding a slot up thats to big and you want to fill it in and remachine The ripper is ideal as will laugh at the weld and not show any wear-remember run then at the RIGHT SPEED to prolong the life of the tool,I have seen many ruined in a short time by someone running them too fast.A hyfeed tool is similar to a ripper but the "knuckles" on the tool are finer these remove metal a lot quicker than an e/mill and leave a better finish than a ripper its descibed as a "comercially accepted" finish and often is acceptable without finishing. Both tools can be reground on an appropiate tool grinder so will last you a long time if you look after them
Jasonb:
Ketan at ARC sent me a couple of the normal cutters from the "premium" range to test a while ago before he took the range on and they have been very good. The factory makes for several of the large "brand" names and apart from the ARC logo these are no different. I have since bought a dozen or so.
J
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