uxcell M3 x 0.5 Spiral Flute Thread Tap, Metric Machine Threading Tap HSS Nitriding Coated, Round Shank with Square End, H2 Tolerance, 2pcs

Worked well in 1/4 mild steel as well as in 5/16 Aluminum

They just work. Have been using them in my mill with rigid tapping and they are working well in aluminum.

I bought these to tap extruded aluminum ends. I was using a hand drill at very low revolution speeds, I mean creeping. I had a very thin stream of compressed air in the hole/tap to keep chips from building up. WD40 in a small squeeze dropper with a blunt needle tip was used for lubrication. I found it only takes about 5 drops to be good enough and maybe adding a few while tapping if it feels like it’s binding up. I was taping up to the shoulder of the tap which is about an inch and an eighth deep. I didn’t have any big issues however I did have one break off in the hole after about 80 holes. I don’t think it was the taps fault, it was most likely the hand drill wobbling while holding it. I managed to tap 104 M5 holes and 136 M6 holes in extruded aluminum using the uxcell spiral taps. These threads don’t seems to be the tightest fit to any of the bolts I have, but cinch up solid without stripping the new threading. I will be buying another pack of uxcell M5 to replace the broken one since this brand seems quite durable.

buena calidad exelente acabado, un desempeño notable en la torcion, no se grifa con el aluminio, no tan recomendable para aceros duros o inox

Ordered a set that literally shattered getting tightened into the ER20 tap holder. Got a second set and the first tap has done almost 25 holes in stainless 304.

Makes a clean and satisfying M3 0.5mm thread in acrylic 2mm thickness. Used it with a power drill rotating slowly and without any coolant.

I use in a hand held electric drill very cautiously to tap new holes in 6mm thick brass for a 2mm bolt. Dill a 1.6mm hole then run tap. Now I have found it to be much faster to drill a 1.8 mm hole then let the 2mm bolt make its own threads

I do a lot of tapping at work and sometimes loan my taps to others but not any more. These taps are great! Instead of the debris staying in the hole it is automatically ejected out the top of the hole. Easy and sharp, these are the best taps ever, a lot stronger than 2 or 3 fluted taps. try these I know youll like them.