anyone ever use one of these Diver endmills from Gurhing?
I think I would be scared to try it
https://www.youtube.com/watch?v=9_iOGGC70mQ
I think I would be scared to try it
https://www.youtube.com/watch?v=9_iOGGC70mQ
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Guhring "diver" endmill
- Thread starter csharp
- Start date
- Replies 27
- Views 12,393
Milland
Diamond
- Joined
- Jul 6, 2006
- Location
- Hillsboro, New Hampshire
Interesting. Looks like there was a fair amount of deflection either in the spindle or tool/tool holder during the cutting, as the surface finishes looked a little suspect even at the feeds they were using. This is really shown at the end of the video, where the finish pass doesn't clean up the bottom 1/4 of the wall. If not deflection, I wonder what caused that?
Atomkinder
Titanium
- Joined
- May 8, 2012
- Location
- Mid-Iowa, USA
Or they purposely kept it off the floor. You can see on the HPC roughing right before the finish pass it leaves floor material there too. I suspect it has more to do with the corner edge geometry that also allows it to drill and ramp so steeply.
I'd try one for free, though!
Edit: watching again, I think it's a wear pattern.
I'd try one for free, though!
Edit: watching again, I think it's a wear pattern.
Last edited:
AARONT
Stainless
- Joined
- Feb 19, 2013
- Location
- Madison, WI
Always with the metric feeds and speeds. 
Hold on, let me grab my calculator.
Hold on, let me grab my calculator.thesidetalker
Stainless
- Joined
- Jan 11, 2015
- Location
- Bay Area, CA
LOL. This comment on YT is great
I've got a set of the Divers sitting here on my desk still.. Comes with one of each size. Haven't had a chance to play with it yet.
A lot of those demo videos are fun to watch, but it's easy not to think about what machine they're using and it doesn't always compare to what a lot of people are actually using.
I'll try it one of these days, but I really feel like that commenter and it won't necessarily work on my Haas just like the video..
I'm guessing it's some burly 50 taper. (the holder looks pretty big too when it shows the drilling) I really don't see my Haas doing that. lol. Maybe with a lot of racket or screeching!
I've got a set of the Divers sitting here on my desk still.. Comes with one of each size. Haven't had a chance to play with it yet.
A lot of those demo videos are fun to watch, but it's easy not to think about what machine they're using and it doesn't always compare to what a lot of people are actually using.
I'll try it one of these days, but I really feel like that commenter and it won't necessarily work on my Haas just like the video..
I'm guessing it's some burly 50 taper. (the holder looks pretty big too when it shows the drilling) I really don't see my Haas doing that. lol. Maybe with a lot of racket or screeching!
Atomkinder
Titanium
- Joined
- May 8, 2012
- Location
- Mid-Iowa, USA
You can send me one and I'll try it in our Haas for you! 
Jay Fleming
Hot Rolled
- Joined
- Aug 7, 2014
- Location
- Noble, OK
What makes the Diver so special compared to a center cutting end mill?
Dave K
Diamond
- Joined
- Mar 21, 2004
- Location
- Waukesha, WI
It can't be deflection. Deflection during climb milling, would leave more stock to clean up, not less.
I've used a 1/2" Diver before. I put it in a 2" ish endmill holder in a Doosan 40 taper mill. My take on it out the box is that the endmill has way too much projection out of the holder with the weldon flat. I had to slow the rpm's way down to do a full slot. It does work well for plunging straight into the part, but I would use it as a roughing endmill. I spoke to my Guhring rep about it and he did say that a finishing endmill would be a good idea in most cases. I also asked if the weldon flat could be ground farther down the shank for less projection out of the endmill holder. I want to try it again but I will put it in a Big Plus holder this time.
Jay, the endmill is basically a 180 degree 4 flute drill. Two of the flutes are ground like a drill for plunging. I really like the plunging and steep ramping capability of the endmill. I think it will take a little tweaking compared to standard endmill.
Jay, the endmill is basically a 180 degree 4 flute drill. Two of the flutes are ground like a drill for plunging. I really like the plunging and steep ramping capability of the endmill. I think it will take a little tweaking compared to standard endmill.
Milland
Diamond
- Joined
- Jul 6, 2006
- Location
- Hillsboro, New Hampshire
Agreed in the case of "simple" deflection, but perhaps it can actually cut oversize while wobbling, that would give you a shallow upside-down V cut. Then when the lighter finish pass comes it doesn't get the bottom of the V. Yeah, it's a stretch but I would like to know how it happened.
Dave K
Diamond
- Joined
- Mar 21, 2004
- Location
- Waukesha, WI
Nah, any decent 40 taper machine will handle that cut no problem with the right holder and stable setup.
thesidetalker
Stainless
- Joined
- Jan 11, 2015
- Location
- Bay Area, CA
kschmidt-toyoda
Plastic
- Joined
- Jan 5, 2016
I am an AE for Toyoda and at my Tech center I share a shop space and Machines with Fraisa Cutting Tools. We are doing cuts like these all the time on our Toyoda Cat40 Verticals and Horizontals. I have seen some testing of these divers and they are a pretty impressive tool but the Fraisa tool provide for better surface finishes IMO.
Isn't Fraisa really expensive compared to other brands?
dstryr
Diamond
- Joined
- Jan 22, 2010
- Location
- Nampa Idaho
I've always wanted to try Fraisa endmills. No clue who sells them.
Need to do some research.
Atomkinder
Titanium
- Joined
- May 8, 2012
- Location
- Mid-Iowa, USA
I used their hard milling end mills at my last job, and yeah, they aren't cheap. Worth every penny though.
They will sell direct IIRC.
michiganbuck
Diamond
- Joined
- Jun 28, 2012
- Location
- Mt Clemens, Michigan 48035
likely has 9 to 12* end primary clearance... Yes any end cutting end mill with increased axial clearance will do the same.. *Still Guring makes nice cutters.
edwin dirnbeck
Hot Rolled
- Joined
- Oct 24, 2013
- Location
- st,louis mo
I have been seeing this for 60 years. Its a good end mill ,but when ruffing with a sharp cornered cutter of any kind wether it is a mill or a lathe or a hacksaw or woodsaw ,that SHARP CORMER will be long gone and the rest of the cutter will stil be very usable.You cant beat physics .Edwin Dirnbeck
Atomkinder
Titanium
- Joined
- May 8, 2012
- Location
- Mid-Iowa, USA
Looks like a .02-.03" radius on that tool in the photo that thesidetalker posted.
