[Magnum164]

I am making some parts that are rather small and require 1mm radius in some corners. These parts are about 6mm deep or to drop them I need a cutting depth of over .25IN. This is 7075 AL.

Anyone know of a good place to buy these smaller endmills with a longer DOC?


Finding out the hard way that cutting small parts requires some advanced planning

And to answer some of the questions I am changing the design and going with a larger radius for now to get the customer some parts since I know they will work but do need to get the smaller radius to reduce some weight on the part.

[BlueFin]

Check out the Harvey Tool product line, they have crazy small end mills. They currently offer a .078" (.0785" is 2MM I think?) end mill with lengths of cuts that range from .406" to 1.187", these are 3 flute 1/8" shank.

[Magnum164]

Check out the Harvey Tool product line, they have crazy small end mills. They currently offer a .078" (.0785" is 2MM I think?) end mill with lengths of cuts that range from .406" to 1.187", these are 3 flute 1/8" shank.

Thanks.. That may be what I am looking for. At some of the prices though better make sure I am on the very conservative end of the feed and speeds

[Magnum164]

Is there a place to buy the Harvey tools online? I have a local dist, but I would have to take off work to go by and place an order.

[Andre' B]

Is there a place to buy the Harvey tools online? I have a local dist, but I would have to take off work to go by and place an order.

Do they not have a phone? ;-)

[Magnum164]

Do they not have a phone? ;-)

What does a phone have to do with anything? I am looking for a place I can order the parts when it is convenient for me, not them.

[Scott_M]

How about you use a 1/16" endmill and program the radius. Their standard 2 flute is .250 LOC. Here they are for $3.50 2FL SE REG SQ I use this company for all my end mills. Carbide for the price of HSS and it is top quality stuff. Check out their threadmills.

Scott

[Magnum164]

How about you use a 1/16" endmill and program the radius. Their standard 2 flute is .250 LOC. Here they are for $3.50 2FL SE REG SQ I use this company for all my end mills. Carbide for the price of HSS and it is top quality stuff. Check out their threadmills.

Scott

Hey Scott I had to think about this a bit. Not sure what you mean about programming the radius? The 1/16 will work for the through holes I have as the actual diameter comes out to about .079...

I'll probably order from this site even though they have a $70 min order. I suspect I am going to break a few of these starting out

But I am curious about programming the radius if you don't mind expanding.

[ImanCarrot]

I had to do a similar job that needed a 0.56mm diameter with a 6mm length. I got them from Guhring (Guhring, Inc.) I'm looking at them now. They'll definately do a 1mm dia with the length you need and have branches all over the States.

Their catalogue is over 1600 pages!

I've got no contact with them- just a satisfied customer.

[Scott_M]

Hi Magnum
I am assuming from the original post that you are talking about a 1mm radius on an inside corner. If this is true then you would want to use an endmill with a smaller radius and follow the contour. If you try and put the same size radiused cutter in a corner you will have too much cutter contact and are asking for chatter. These little endmills won't put up with much of that. I would probably drill undersized in the corner and remove most of the rest of the metal with a 1/8" or 3/16" endmill and then do my final profile pass with the 1/16th endmill. G1 moves approaching the corner and G2 or G3 around the radius and G1 away.

Scott

[Magnum164]

Hi Magnum
I am assuming from the original post that you are talking about a 1mm radius on an inside corner. If this is true then you would want to use an endmill with a smaller radius and follow the contour. If you try and put the same size radiused cutter in a corner you will have too much cutter contact and are asking for chatter. These little endmills won't put up with much of that. I would probably drill undersized in the corner and remove most of the rest of the metal with a 1/8" or 3/16" endmill and then do my final profile pass with the 1/16th endmill. G1 moves approaching the corner and G2 or G3 around the radius and G1 away.

Scott

Scott. yes you are correct it is an inside. For most I can "fudge" on the actual radius. But a couple are actually faying surfaces and so I would need to go the route of smaller endmills.I had completely forgot that a 1mm radius would actually be a 2mm end mill, so a 1/16 should work fine. I will be ordering some of the 1/16 endmills from the site you listed so will be a bit before I can try it.

[twocik]

Harvey tools is a great tooling company, but only sell thru dealers. Best to call them, they'll direct you. Little on the pricy side

[Magnum164]

Harvey tools is a great tooling company, but only sell thru dealers. Best to call them, they'll direct you. Little on the pricy side

Yea I know. I just don't do phones..