iCrimp Mini Micro Open Barrel Crimping Tools Works on AWG28-20 JAM, Molex, Tyco, JST Terminals and Connectors used for FPV, Drone Servo

As a DIY guy with a variety of hobbies and home repair needs, IWISS tools are in that sweet spot of price, value, and durability. Will these hold up to regular daily use in a professional environment? I don't know. They are perfect for someone like me that only needs them for the occasional small project. I now own four or five IWISS tools and they all perform perfectly when I need them and they don't hurt my wallet.

This is primarily used for JST-XH connectors, I've used it on smaller ones. I bought a ratcheting one first, that just nipped the ends off the wires, never could get a decent crimp. This one took a bit of trials to get working right, can do a connector in a couple of minutes now. Tip for use, clip the pin off the carrying strip and stick it in the appropriate jaw opening first, then close the jaw to hold it. I'm a righty, so that's using the right hand, pin opening to the left. Left has the pre-stripped wire ready to stick in the pin. Run it in to where the insulation is past the first set of lugs and immediately crimp. Then move the combination over to the next larger opening and repeat for the insulation. I'm getting crimps that look factory. The key is no hesitation, once that wire is past the first set of wings, crimp. And with the small JSTs, you need a very small bit of wire stripped. The ratcheting one wasn't as easy to use, was always stuck in one position or another and I couldn't feel how the crimp was doing. Always mangled the pins. The small ones don't take tons of force and don't need a lot of leverage to crimp. This one is about perfect for that use. The one I have seems to be well made, I've used it for a couple of years now. It's replaced I don't know how many thermistor, heater and fan connectors on 3D printers.

I like these because they will crimp a wide variety of terminals. They do a good job on 2.54mm JST connector terminals. If I were needing to do this frequently, I would spend the extra money for a dedicated ratchet crimp tool. Its a little tricky getting those tiny terminals lined up correctly, they tend to tilt to one side. Still, they produce a good solid crimp on the conductor. You then have to make the crimp on the wire insulation. You really have to take the extra time to bend the little "tails" of the terminals inward. If left angled out, think V shaped, they either slip out of the jaws or get mangled. The instructions for the tool tell you to do this. Also, I found that a little downward pressure on the exposed end of the terminal while you SLOWLY crimp onto the insulation helps a lot. As some other reviewers noted (see all review pics), the crimp tails can get pushed backwards if you don't do this. Also, you don't want to crush the wire insulation (see my photo). Do these produce a good crimp, yes they do, with care. Can you do it quickly, no, not with these.

I bought these July 2019 as a quick, next day delivery, “get me by until I can grab a nice pair from the tool truck” tool. I thought for sure they’d get a few uses and fall apart, but here we are, May 2020, and they’re still crimping along, usually daily! I crimp every small connector I come across with these; JST-XH,ZH,SH and even PH! Losi, PicoBlade, DuPont (servo connectors), etc. I’ve yet to have an issue with them, they just work! The ONLY gripe I have is that tiny connectors are somewhat challenging to keep aligned for the first crimp BUT you’ll find this is the same with every crimp tool when working with tiny connectors. They’re tough, easy to grip and unbelievably accurate. PRO-TIP; If you’re having trouble crimping with any crimp tool; 1) Choose the largest groove on the crimp tool that the connector pin to be crimped will fit in to. 2) Align the connector pin to be crimped in the tool, make sure the open side of the section to be crimped faces the W shaped groove (remember; the crimp tool will fold the metal flaps over the wire and crimp them down into and around the wire. 3) Insert your wire into the pin, until the wire jacket is just outside of the area you’ll crimp the wire into. 4) Crimp It! *The wire, not the jacket* Then move your pin to the next smallest groove that it barely fits in to, and crimp it again! Continue until you get to the smallest spot it will fit in to without major resistance and then move in to step 5. 5) Crimp the wire jacket into the wire relief about half way, and then, like before where you start large and work your way down, crimp it the rest of the way, gradually working it down the smaller grooves until it looks snug. 6) Verify your work. Pull test! Be gentle if it’s a tiny wire. KEEP IN MIND; * If at any point this tool fails you, try again! * You will almost certainly crimp incorrectly several times, wasting pins, try again! * You will almost certainly pull the wire out of the pin a time or two, wasting more pins, and have to.. try again! * You will almost certainly crimp too hard a time or two and either break the pin or tear the wire, just try again! You’ll get it eventually... don’t give up and blame the tool, just try again! You can buy pins to replenish any failures pretty cheap here on Amazon. The last batch of pins I bought were 1000/$4. That’s expensive if you’re running through tens of thousands of them a day but we’re Makers and DIYers, not large assembly plants, so order more and TRY AGAIN! 😀

The little hand held crimp pliers work way better than the ratcheting type. Especially if you're doing multiple sizes of wire and crimp connectors. The ratcheting kind are probably good for the standard sizes, but when working with small fittings and wires, it's hard to see what is happened. The ratcheting type require you to have it set up perfectly in the beginning. These handheld versions allow you to crimp just the insulation or just the conductor first, then move on to the other part. They also let you see what you're doing and let you get set up, open, close, open, close, etc. repeatedly vs. requiring it to be perfect from the get go. The other plus is all the different sizes of openings. There are a bunch of sizes that get progressively smaller and you can incrementally crimp tighter and tighter. I thought the ratcheting kind would be the best but I end up using this one way more often.

The overall quality and usefulness are both good. The assortment is useful, the quantity is generous, and it is a good value for wiring or fabrication work. The correct gauge, die, heat, and strain relief still matter for a dependable connection. It has earned the five-star rating from me.

For the price it's a great piece of kit. Compared to much more expensive crimpers, it's garbage but you'd have to spend a lot more to get something that makes this IWISS look bad. I crimp a dozen or so connextors maybe twice a month for various projects so I can't justify spending $80-$100 for a high end tool. For the price this crimper does everything I need it to and saves me a lot of time over using just a needle nose plyers. The jaws are ever so slightly out of alignment but not enough that they don't crimp well. The pivot feels a little crunchy and the edges are rough in spots, but when you squeeze it, things get crimped and wires stay put. Great tool for the enthusiast.

I bought these for use with JST, DuPont and Molex connectors and it works great. I saw a number of reviews that recommended against getting the ratcheting style crimp tool for small connectors (<3mm) and I’m glad I did since this tool was cheaper and worked great. I had never crimped anything this small before but a quick review of the instructions (which are clearly written) and a few practice crimps later and I managed to complete about 60 crimps with only one not working correctly.

Pinza perfetta per stringere contatti per connettori KK e JST, non ha il cricchetto per cui si può facilmente dosare la forza di crimpatura sui vari contatti per non tranciare il conduttore

Cette pince est de bonne qualité et bien fabriquée. Elle nécessite un peu d'entraînement mais une fois maîtrisée, elle offre des sertissages très précis et fiables. La construction est robuste et semble parfaite pour une utilisation régulière (comme amateur en tout cas). Le prix est un peu élevé, mais elle est essentielle pour les amateurs de bricolage et les makers. Je recommande vivement cette pince !

no come back for electric so I believe it,s ok

Works very well

Buena tenaza con bocas estrechas, ideales para conectores extremadamente pequeños tales como los XH y los KF2510.