BILITOOLS M5x0.8 Thread Repair Kit, HSS Drill Helicoil Repair Kit Metric

While rebuilding a 1973 Evinrude 6hp outboard, I lost threads from several bolt holes due to aluminum corrosion adhering to the stainless bolts. This kit worked perfectly to rethread the stripped holes. Great kit. Great price.

i'm almost finished making a custom router table insert from a 3/8" thick aluminum plate. I have what I thought were the hard parts done: mounting bolt holes, the center bit hole and rabbet to hold some plexiglass zero clearance rings, etc. I planned to tap 8 holes for the starter pin locations -- four centered on the outside edge of all four sides about 3/4" from the edge, and four more in line with those 4, but 3/4" from the bit opening at the center of the plate.After breaking 3 of the 8 taps that came in a set from this site, I sent them back for a refund and bought a single-size drill bit and tap set for much less. That tapped the 4 outside edge holes perfectly.Unfortunately, 2 of the inside holes were slightly too big, because 2 broken taps had to be extracted with a punch and hammer. The final 1/4x20 tap was able to complete those 2, but they wound up looser than they should be The 3rd that broke was the 1/4x20 tap, and it remained in the plate. I was unable to pound it loose. My efforts to remove it also caused some minor damage around the hole.I ordered some diamond hole saw "bits" from this site, and managed to remove enough material around the stuck tap to punch it out. Whew!!Oh, the 4th inside hole was tapped okay except it was not perpendicular. The starter pin was at an angle when screwed in. Four out of four holes were messed up to varying degrees.I've never used the helicoil or any other thread repair product, but the reviews looked promising, and the process appeared simple enough.This helicoil kit arrived today, and I proceeded to repair all 4 holes. I first drilled them all while I had the drill bit from this lit in the drill press. I then tapped the holes using the drill press but turning the spindle by hand to hopefully keep the tap perpendicular to the plate.Between tapping each hole, I used a drill-driver on low speed to extract the tap from the plate, then cleaned and installed it into the press again. I used compressed air to clear out the newly tapped hole, and I followed the instructions to insert the helicoil and break off the pin.Installation succeeded without any problems. The helicoil inserts are almost exactly the same depth as the plate, so that's convenient.Now i have four freshly repaired, threaded holes around the bit opening. There's a very small damaged spot next to the one hole I had trouble extracting the 3rd broken tap from. I may try filling it in with the aluminum braising rods i just got for a different repair, but not right away. It's 99% cosmetic as far as i can tell. The starter pin screw works fine in it and sits perfectly perpendicular. That's what matters most.BTW, I was comfortable with the design of this product, because in woodworking, I use a lot of threaded barrel inserts for jigs and such. The Helicoil is basically a metalworking version of that wood-working fastener.i don't often need to repair stripped threads inside a bolt hole. However, the next time i do, i'll know what to use.

Worked perfectly and saved me big money. Thank you

Nice to have the correct drill bit, the correct tap and the replacement threads all in one kit. Had some trouble installing the new threads probably my technique not as good as it should have been. Have done these before with another well-known brand and also had a few problems, but did make it work in my aluminum Acura engine block.

Last year my lawnmower handle came loose at one of the two points where it bolts to the chassis. This simple problem resulted in the mower being almost unusable. The stripped threads were in the deck of the mower itself and I struggled to make it through the season.This Spring I used the Bilitools kit to "re-thread" that stripped area in the mower deck. It was a surprisingly easy process and I am thrilled with the results. The mower handle is once again firmly attached. I hope this fix gives me at least another year of mower use.

I've been using thread repair tools for 40 years.Heli-coil was the best, and the only one for a long time.This brand is the beat that I have ever used.It comes with the correct size drill bit ( good quality).It has and easy to use installation tool.The tap tjat is included is high quality, very sharp, and it lines up easily to the hole being repaired.This is my preferred brand now.I have most of the common standard and metric sizes of kits.

The kit worked great and contained all the parts needed to do a basic thread repair on some stripped out valve cover bolts. For $15.00 bucks I would buy this kit again. Napa sells a kit for $40 bucks, and only comes with 3 helicoils. This kit comes with about 20 helicoils for $15.00 buck. You do the math here! I would highly recommend this kit.

I had two threads to repair. Having never done this, I didn't know what to expect. The first went so incredibly well. On the second, the tap broke. After getting the broken tap out, I was able to finish the repair. I'll have to get another tap if I need to repair any others, though.

nice repair kit good price good instructions

Buena herramienta he comprado de varias medidas para estar completo en mi taller y así no paro el trabajo y lo termino en tiempo y forma.

This kit is excellent. Drill, tap and installation tools work well and are good quality. Zero complaints here.

Great little kit.Easy to use, worked well.