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

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.

While taps break, it sucks this one broke so quickly. If I had more than one to review I would either give it less or more stars, but since I cant properly test if it was just a fluke, I give it 3 stars.

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.

The price is right but you get what you pay for. It seems like a Chinese tap to me. Broke one after 14 taps. Set up on a Bridgeport, low rpm should not have been a problem.

I am very impressed with this tap and handle. I could not believe how much easier it was to cut threads using this setup. I had to keep reminding myself to use oil because this tap would cut decent dry even in 1/8 plate.

Worked great on redoing the pistol grip threads on AR receiver.

originally bought the Dewalt package, which is really, really hard steel & it snapped in the hole. Now this is a really small screw in a lawnmower, holding the transformer in place that sparks the spark plug as the magnets float by, so I couldnt go bigger. Used a grinder to make an [X] on top center of hole & titanium impact bits from Harbor Freight to cut the initial hole & break bit. The larger grooves & some PB blaster, allowed the metals to collect as I turned the new tap, so I could screw unscrew, blow out/wipe & repeat, until the hole was clear for a new screw to go in. Dewalts pack, just didnt have deep enough grooves for the metals & snapped when I was unscrewing, which was likely my fault. But this bit allowed me to go deeper, so it was quicker & a better choice for my project.

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.

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.

ordered a pack of 12 taps. assumed they would all be right hand. some of them were left hand and useless.