SPEED TIGER Carbide Square End Mill - 3 Flute - IAUE1/4 3 (5 Pieces, 1/4") - High Feed U-Type Design - for Roughing and Finishing - for Milling Aluminum Applications – Professional Mill Bits Sets

Title says it. We ran a lot of these and probably would’ve kept them going before the astronomical price increase. For what they are charging you’re better off with USA made end mills. Garr is a higher end end mill and from the right supplier cost $30 each and will outlast the speed tigers 3:1. We have had so many breaking and leaving a bad finish after little use they wear out fast. The early ones we ran at 300ipm however the last 10 packs we couldn’t go over 120ipm without snapping them. We can run Garr at 400ipm if it’s any comparison. Take a look at the photo of broken speed tigers. Also if you have an issue with them customer support is non existence. It’s a cheap end mill attempting to get a mod range price. These end mills are not as good as Molza which are only $13 each so unless you need the extra cut depth I highly recommend you take a pass and save your money.

Used this cutter for a deep slotting operation in aluminum plate. Cutter (3/8" dia) performed very well, cutting full width .25" depth of cut per pass at about (power feed not CNC) .003 per tooth chip load. I used a straight plunge to start the cut and it did equally well but if you have a CNC I would use a ramping strategy.One cutter did 32 parts with over 72" of slotting in each part with no appreciable wear, cutter was still objectively as sharp as new (when I dropped it on the floor in a toolholder and broke it 😖). Used mist coolant system throughout the process and keeping it wet made a big difference in cut quality.Chip evacuation was good and surface finish on finish pass was outstanding. I bought a couple more just to keep on hand for future jobs. Great cutter at this price point.

I bought two of the 3/8 3FL end mills, and am very impressed. On my little RF45 Clone CNC I was cutting 0.050" WOC 0.50" DOC (full depth on this particular part) at 75IPM in MIC6. It sounded great, and defiantly could have taken more. I will probably start pushing it to 0.075" WOC, even with my crappy spindle with tons of run out.Update:Pushed the DOC to 0.75" and WOC to 0.075" at 0.004IPT in 6061 T6 and it ran great. It was about all my little 2HP spindle could handle, but I think I will push it to 0.0045IPT next time I run that part... for science... All and all, great budget mill for the hobby world.

I am machining holes in 18 Gage aluminum. This end mill does a fantastic job!The end mill I used before left a really bad burs I had to remove from the finished part.This end mill cuts very clean with no needed de-burring. I will buy this end mill again. Iplane to order a few extra to have on hand.Thanks! Jim C

I figured if i am leaving a review I should mention I am not running a HAAS. I used this end mill in my Avid CNC CRP4824, and this tool is the best I have used on aluminum. I'm getting 28% step over at 40 ipm, but my Dept of cut is only .04" I'm still new at this and have a hard time taking deeper cuts. maybe its just me or maybe its the machines ability; but it is not the bit. Overall this end mill has speed up my machine times.

Looked good at first. Using to machine 6061 t651 aluminum. Vibrate violently at standard cutting speeds, poor finish quality when slowed to 40% of standard speeds for the tool in aluminum. 300 sfpm is as fast as it will run in my machining center. Edge relief angles are incorrect that causes this issue.

This endmill is chewing thru 7075 aluminum! No chatter even at full depth of cut! Awesome finish and still razor sharp after alot of milling. 0 chip welding even straight slotting 3600 rpm and 23 ipm

Shipping was fast and it appears to be well made although I haven't had an opportunity to use it yet. If it works as well as it looks it should be fine.