Drill America - DWT57129 1/4-20 High Speed Steel 2 Flute Spiral Point Tap, DWT Series

This tap held up and did not break when using. I had broke two other brand taps and this tap held up and did not break while using it on aluminum.

I threaded about 5 inches of hole before she got slow. Was able to touch up with angle grinder a few times and get another 5 inches of tapping. I was impressed that the tap didnt require much backing up to break the cutting, was able to drive ahead for many turns at a time.

#8--32 tap worked well. I used as a re-threader in an old junction box so I could use two semi-corroded screw holes

Put threads in a piece of metal

I needed to tap a piece of metal on my shower valve. This tap, along with the handles I bought separately, did the trick. This was a hand tap. But it says its suitable for high speed tapping. Maybe Ill try that, too.

1/4-20 two flute spiral point taps were too brittle and with too small a cross section to successfully tap a 13/64 hole through 1/4 thick mild steel bar without breaking using a hand tapping wrench and cutting oil. Broke both taps I bought in the same hole (first one I tried them on); could not apply enough torque to cut to full thread depth before the tap broke. I was very gentle with the second tap and kept backing it out. Didnt help. At least the deep flutes allowed me to twist and break up the tap remnant left in the hole with needle-nose pliers. Crumbled like glass. Was able to successfully tap the holes with a US brand four flute taper tap easily.

I am a Machine Tool Field Service Technician for the past 23yrs and have drilled and tapped literally countless holes (thousands), especially 1/4-20. I install CNC and DRO retrofit systems on machine tools. I purchased 10 of these taps to try and unfortunately, I am somewhat disappointed with their performance. I ended up snapping two of them on their first time usage. For some reason, they just didnt perform well at all. Just tapping through holes in machine tool castings. I dont plan on using the other 8 taps

I liked the concept but both of the taps broke when I first tried to use them. I used the #7 drill bit supplied by the same company too. I used tap magic religiously and tried not to force the tap while breaking the chips... definitely a waste of money. At least the drill bits are holding up since they are suppose to be m42 cobalt steel. Now on the hunt to find a different brand ¼x 20 tap.

It broke on me but to be fair you take a risk each time you use a drill instead of a tap/die bar. It cut through thin gauge steel (my original reason for buying it) without tap fluid easy. It made it through 10 out of 12 deep aluminum holes with fluid before snapping. To be fair, and hence my 5 star, I knew the risk from using a drill for it and it was an afterthought. Some slide/rail parts I got only had half of the holes tapped for whatever reason, and I noticed they were 10-32 so I finished em with this guy. If I had an originally bigger purpose for purchasing, I would have paid $10 for a solid tap bit, but since I initially bought this for literally 4 tiny holes, and it was $3, Ill give it 5 stars

Really nice quality tap for the price.