SPEED TIGERMicrograin Carbide Square Long Flute End Mill - 3/8" Diameter 1-1/2" Flute Length, 4" OVL, 4 Flutes - ILET (1 Piece, 3/8") - for Alloy Steels, Hardened Steel & Metal– Mill Bits Sets

I have been having great success with these, I had never heard of Speed Tiger, but the price made me try their chamfer tool, I now have two sizes of that cutter and they are better than any chamfer tool I have ever owned!I use this cutter to cut everything from plastic to stainless!

These bits work great on aluminum but do not work on steel. I cut a lot of recievers and bought a few of these. A friend needed some milling work on a piece of steel that really just needed cleaned up burs. Well it ruined the bit. The steel in the slot was stronger then the bit steel. But they work great on aluminum.

I’ve bought several items from this manufacturer, with good success. During a 1” deep operation, in aluminum, on fine feed, just exploded in 3 pieces, also ruined my part with 40 hours machining. Very disappointed. First time I’ve ever left a comment

Used to make a plunge cut on a round, mild steel bar. Worked great! No signs of wear on the bit whatsoever.Will update if there are any problems in the future.

Worked good to mill out an 80% lower

I bough this endmill for a stainless steel project and it worked well. It cuts as expected and held up very well, even with some heavy cuts and feed rates that were proably faster than ideal. Highly recommended.

This is a tough one to rate. They say you can use it with steel, but you'll just dull it instantly. It's supposed to be for steel, so for that it's 1/5. So, why am I not rating it 1/5? It's great in the soft stuff. It works on aluminum and brass like it's meant for it. So, it's 5/5 in aluminum and brass. If you tried to use this on something like 4140 steel, you'd probably just break it.I went back and forth between rating this 3 and 4 stars. I think it's more of a 3.5 star product than it is a 4 star product, considering it is completely useless for steel and steel is what's in the title. It is great for softer metals though. It really can make some clean cuts in brass and aluminum.

Product Reviewed: SPEED TIGER Micrograin Carbide Square Long Flute End Mill - 1/4"Diameter 1-1/8" Flute Length 2 pieces for $28.34TL;DR; Very clean fine grind; centre cutting designI have a medium sized home machine shop and normally use HSS mills. Bench review only.I broke out the macro lens for the pics so you could see the quality of the grind and the center cutting design. These have the heft of Carbide and are nicely executed. I don’t have a project for them at the moment but past experience with import carbide and HSS has been nothing but positive. The packaging was great – resealable bag and two secure mill boxes so into the kit they go.I don’t have any critiques of this product however I don’t have a good value sense for carbide tooling either still, $14 seems fairly reasonable to me.5 Stars.How I review:Reviews start with 5 stars and I subtract points.- 0 for value but I try to provide guidance-0.5 to -3 for product not matching description e.g. stainless steel is actually plated steel-0.5 to -3 for product missing badly on executionI select products carefully so low (1-3 scores) are rare but detailed comments and critiques almost always are in the review. Most of my reviews come out 4-5 range.If possible I dismantle or destroy items to examine inner workings.