Thread Repair Tool, File, Chase, Restore, Repair, and Clean Internal and External Thread: Male, Female, Inch, Metric and Pipe Thread (RT1) (3/8 Dia. Head x 2 Length x 1/8 Arbor) by Rotary Thread

Im a mechanic. Damaged threads are just part of the job sometimes. The case that brought me in contact with this tool was a spindle on the rear end of a Dana 80 truck axle. It would have required a $200 3 threading die. I decided to try this tool. I took something that looked beyond repair and transformed it to the point where the large lock nut spun on by hand. It takes some skill. Its not a toilet plunger. You need to have a steady hand and a good Dremel tool but the payoff is quite impressive. Its a tool anyone who works on anything threaded should have. It saved my butt and a buttload of money as well.

Im not sure this product really repaired the threads. I had some threads on an M12x1.0 that were smashed in a small area that made it difficult to thread a nut. This tool is just a grinder and you need to be cautious about grinding too much. While it worked in that I could thread the nut on it was mostly due to the fact that this basically removed the threads in the spot entirely. If you arent careful you could potentially cross cut the threads. I think this may work better on larger thread pitches like 1.25+ but on fine threads like 1.0 its more difficult. The product worked but for the money a die or chaser still works better.

I have to say, I was skeptical but this tool really got me out of a bind! I was rebuilding a rearend on a car and somewhere along the line the threads by the hubs were damaged. I could not get the nut to start and it was clear to see the malformed threads. After going over the threads a few times with this bit in a Dremel, the nut went right on. Saved me a ton of rework and a trip to the machine shop - or having to purchase a massive die. The price is a no-brainer, I highly recommend.

Great tool to fix and reform threards that may be damaged, rusty or very gunked up.

Its very rare these days that things actually work, and this thing worked. Saved me $985!. We have a firetruck and one of the hose reels threads had corroded to the point of no return. The replacement cost was extremely expensive as the thread is attached to one piece and can not be replaced. I gave this thing a try as a hail-mary and it actually worked. Half of the threads were on the backside that I couldnt see so I just followed the front threads and prayed that i wouldnt jump over a thread. Followed it all the way back around and kept going. Used a little Brakleen to clean off the grit and the coupler fit right on first time around. I still cant believe it.

Although I was shocked by how small it is - it saved a damaged 3/4 threaded rod I had already welded to a bracket. I used a Dremel and magnification and was able within a few minutes to get the nut to travel the full length of the rod. ONE LIMITATION is this works best where you can get the tool perpendicular to the threads being repaired. Even using a Dremel extension I had to work at a slight angle 6 from the end of the rod which wasnt a problem due to the large threads I was fixing but it could be an issue on finer threads.

Not easy to use...maybe for bigger thread would work ..but the wheel axle thread it didnt

It fix any bad thread. Highly recommended. Easy to use.

Works exactly how the description said it would.

If you have to repair threads, this is the tool you need, my only suggestion is order the larger one, also do not add pressure to the tool lay it in the damaged threads lightly run along threads,