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Mosey, did you notice the problem before the end mil depth spoiled the workpiece? I suspect the oil is what allowed it to creep in conjunction with the helical milling forces pulling down on the end mill. I hope you may have caught it in time.Bill
Jo,I'm a little confused about you statement. If not using an end mill to cut a slot what would one then use?gbritnell
End mills are not suitable for cutting slots equal to the cutter diameter. For this duty a slot drill should be used; this has the advantage that, unlike the endmill, it may be fed axially down into the work so that slots with blind ends may be cut. "[/i]Jo
Hi Mosey.is it possible you can put up a picture of the W20-ER collet-holder that you have. My be you have a drawing too CS
In that case they should be carried of in someone's boot and deposited in the nearest tip.
It's 2015. I thought we had put the "end mill/slot mill" thing to bed in 2013.In the interest of repetition, here's one more try In the Colonies, you can buy two types of end mill.Center cutting and non center-cutting. It's rare to see the non center-cutting variety. Both varieties are called "end mills."I just checked my end mill drawer. 100% center cutting. I'm assuming that slot mill is the U.K. name for center- cutting. Hopefully, the next time someone posts about milling a slot with an end mill, it won't be necessary to bring this up again unless they are from the U.K. In that case they should be carried of in someone's boot and deposited in the nearest tip.
A quick internet search showed this to be an endless topic . The attached document is from the Central Washington University and seems to make sense to me as a novice.
JasonPlease go into the factors (or physics/geometry) that cause the end mill with more than two flutes to cut over nominal size. It's part of my "apprenticeship." I'm genuinely curious. Thanks
Stan,The KEY word is slot DRILL. It has to be a center cutting end mill to be a slot drill.Dan
quite likely that they mean the same thing as slot cutter
Stan I think you meant slot drill, a slot cutter is another kettle of fish entirely
Why don't we rename this thread to Slot Drills and End Mills, and I can repost my question? My question has nothing to do with either. I asked about milling cutters that creep out of their (collet)holders, and why they do. I too looked at my mills and find that flutes run from 2 to many and all are center cutting.I gather that some prefer to talk about slotting.Or better still, why don't we put it to rest. Mosey
If you are making holders anyway put end mill holders on the list. End mill holders with a set screw are very handy and they will not slip or creep if the set screw is tight.
I've got a small end mill with absolutely no teeth on the bottom at all, it's perfectly flat. Is this normal or has it missed a stage in production? It's brand new, never been used.
Quote from: Arbalest on January 05, 2015, 08:51:26 PMI've got a small end mill with absolutely no teeth on the bottom at all, it's perfectly flat. Is this normal or has it missed a stage in production? It's brand new, never been used.Might need a picture of that
Glad you reached a good solution Do you think that the old collet had worn to a taper?
So, you didn't buy the ultra precision collets, you saving the money for "cutters "Cletus
Looks to me like it's been ground down. Did you buy it new?Simon
Quote from: Mosey on January 05, 2015, 09:21:41 PMQuote from: Arbalest on January 05, 2015, 08:51:26 PMI've got a small end mill with absolutely no teeth on the bottom at all, it's perfectly flat. Is this normal or has it missed a stage in production? It's brand new, never been used.Might need a picture of thatJudging by the weight it's solid carbide, about 5mm.