End mill question
- Thread starter 1982fxr
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Firebrick43
Well-known member
The right three look new or properly resharpened. The left one (same one holding in your hands???) looks like it may have had made a light finish pass or two made with it or it maybe just lint on the corners and camera angles
txvwnut
Well-known member
They appear to be new, you could look for witness marks on the shank to see if they have been mounted in a collet or a holder.
Backstory: I'm not a machinist. Got them from a retired machinist who said they were new. Looked new to my eyes and I didn't see witness marks on the shanks.
Sold those exact 4 on ebay. Packed them real good. Buyer started a refund and sent this message and this one picture.
"Just received and opened this package today. These end mills are used, not new. The cutting teeth are broken and the edges of the flutes are chipped."
Sold those exact 4 on ebay. Packed them real good. Buyer started a refund and sent this message and this one picture.
"Just received and opened this package today. These end mills are used, not new. The cutting teeth are broken and the edges of the flutes are chipped."
badmatt
Well-known member
In the first image you have above the first endmill looks to have chipping.
whateg01
Well-known member
Looks like the corner of the top flute is nicked tooIn the first image you have above the first endmill looks to have chipping.
badmatt
Well-known member
Agreed.
I'm looking close at some others. I can't get my camera to focus up close but I think I agree with you guys. I see tiny nicks here and there on a couple.
I'll try pics again when I get to work and have better light.
If these are nicked up like my first pics appear to indicate, do they have any value?
I'll try pics again when I get to work and have better light.
If these are nicked up like my first pics appear to indicate, do they have any value?
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whateg01
Well-known member
Value? Yes. How much? Depends on the price and what it would cost to have them sharpened and how much the size difference would matter to you. Also depends on the brand. If it's a $20 EM from Amazon, they would have to be almost free, imo
They are the Accupro part # pictured above.
badmatt
Well-known member
That’s MSC pricing.
Likely those end mills are around $30 a piece new from a machine shop supplier.
It’s whatever the market will bear at this point. The influx of cheap tooling for hobby machinists is astounding. So these may be a tough move - depending.
whateg01
Well-known member
Fwiw, I don't think any have been sharpened since the coating on the bottom appears untouched. I missed that you were selling them, or had sold them. I would also return them for not being "new".
Just for fun, I pulled this sheet from the web from a sharpening service. $21 each to hit the sides and ends.
Just for fun, I pulled this sheet from the web from a sharpening service. $21 each to hit the sides and ends.
rsanter
Well-known member
What do you want for them?
for the right price I can care less about used
for the right price I can care less about used
hpmachining
Member
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No, all 4 show signs of wear on the cutting edge of the flutes, so if you sold them as new you should refund. FWIW, I haven't used that particular model, but I have used this Accupro end mill to rough the perimeter on thousands of these aluminum parts, 2.0" axial D.O.C, .05" radial D.O.C at 130 I.P.M. To be clear, I used one end mill to cut thousands of parts and it's still going. I find them to be high quality, made in U.S.A end mills. That being said, I don't generally buy used end mills, but they are still in decent shape. They are selling new for ~$45 (sale price) on MSC which is a decent price for a quality 1/2" carbide AlTiN coated end mill, so price accordingly.
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m.d.hunter63@hotmail.
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Any EM I buy off eBay I measure, lots of regrinds
Byrdnyrd
Well-known member
Typically if an end mill has been sharpened, the size ( on the flat of the shaft) is ground off.
Cheers,
BN
Cheers,
BN
whateg01
Well-known member
Have got a deal for you! I bet somebody here would sell you 4 that have never been reground
RoninB4
Well-known member
-The individual containers, if I understand what you're calling them, are to prevent the cutting edges from one EM coming in contact with another. Cutting tools like end mills, taps, reamers, etc. should not be allowed to contact others because chipping of the cutting edges is possible/likely, especially with carbide. The only thing a cutting edge should contact, besides your fingers, is the material it is supposed to cut. Bulk storage without some protection is almost a guarantee of chipped edges, doesn't matter whether it's been used or not. A simple test of fingernail along the cutting edge usually finds a nicked/chipped edge.
JSGAuto
Well-known member
I'd use them for roughing operations if they were laying around, but I wouldn't buy them.
Sorry...the money is in the machine/labor hrs, not worth it to risk using a tool with wear.
dr_clyde
Well-known member
They look used and re-coated.
Coatings in new or like new condition are not a valid indicator of whether a cutter has been re-ground as they typically will re-coat high performance cutters. I know because I have several regrinds that are re-coated.
Why don't you measure them?
Re-ground cutters will be less than their nominal value. With a 4 flute it's easy enough to check with a standard micrometer. Just measure across the flutes for the largest value. If it matches the nominal diameter, they're not re-ground, but if they're a few thou less (anywhere from .005" and up) they've been re-ground.
Even if they are "new" they're chipped and damaged from banging around in the drawer outside of their box or wax coating. I personally don't want to buy chipped end mills, especially for new prices.
Coatings in new or like new condition are not a valid indicator of whether a cutter has been re-ground as they typically will re-coat high performance cutters. I know because I have several regrinds that are re-coated.
Why don't you measure them?
Re-ground cutters will be less than their nominal value. With a 4 flute it's easy enough to check with a standard micrometer. Just measure across the flutes for the largest value. If it matches the nominal diameter, they're not re-ground, but if they're a few thou less (anywhere from .005" and up) they've been re-ground.
Even if they are "new" they're chipped and damaged from banging around in the drawer outside of their box or wax coating. I personally don't want to buy chipped end mills, especially for new prices.
whateg01
Well-known member
The don't appear to differ in diameter from the shank to the end, but that could just be the photos. None of the em I have had sharpened got recoated. Is that something you have to pay extra for? Or a special request?
Sweetcorn
Well-known member
Those are commodity endmills in standard lengths. They're Accupro on top of that.
Its not worth the time and expense to resharpen and/or re-coat those.
I absolutely agree with the buyer who said they are used. The cutting edges are chipped. I would initiate a refund to him.
While they still may be serviceable enough for jobs where the surface finish isn't critical, they won't perform as a new mill.
Its not worth the time and expense to resharpen and/or re-coat those.
I absolutely agree with the buyer who said they are used. The cutting edges are chipped. I would initiate a refund to him.
While they still may be serviceable enough for jobs where the surface finish isn't critical, they won't perform as a new mill.
mattthemuppet
Well-known member
all used, not reground. At least 3 of them have at least one tip chipped, can't see the one on the right clearly enough to tell. I would also ask for a refund, sorry.
dr_clyde
Well-known member
It costs extra, so you do need to request it. Not to mention there are LOTS of different coatings, so you would need to communicate what you want when you get a re-sharp cut.
It’s also hard to tell by eye if it’s been sharpened unless they are grinding a lot to take out chips or something. It only takes a few thou to sharpen an edge, any more is wasteful.
dr_clyde
Well-known member
Looking at those pictures again those cutters definitely look used. The coating is worn along the cutting edge consistently and is chipped and polished where it’s worn.