iCrimp IWS-3220M Micro Connector Pin Crimping Tool 0.03-0.52mm² 32-20AWG Ratcheting Crimper for D-Sub,Open Barrel suits Molex,JST,JAE

This is a nicely built crimper. I've used crimpers before but not this particular style. Amazon says, "comes with instructions", but not with my copy so I had to do a little trial and error to get good crimps without crushing the pin insert end of the connector. The numbers on my copy of the crimper differ slightly from the Amazon illustration with the largest being 2.0mm instead of the 1.9mm shown. No biggie. The tool has a good ratchet mechanism which is used to hold the connector in place while the wire end is inserted and then the crimp is finished. Makes great crimps. It's coated with some kind of lubricant which stains so be careful no to lay it on your prize tablecloth when taking it out of the protective plastic bag. Wiping it down doesn't help because there's more lubricant in the bag so it's coated again the next time you remove it. You probably don't want it lubricant free, because this lubricant probably contains a corrosion inhibitor to preserve the tool. Very good tool for the price and works well, but when crimping, be sure to check the insertion distance so the actual connector doesn't get crushed in the process.

This tool has been very consistent with JST-XH and JST-PH connectors. Easy to use, highly recommended.

I've tried several different crimping tools for JST and molex and this one is my go-to for JST XH pins. It's easy to use, easy to align and there is very little fuss, unlike the other ratcheting and non-ratchet crimp tools that I have.

the jig on these are perfect for all different sizes. don't bother with the slim plier looking models of crimpers. with this tool it's one simple squeeze and it crimps the wire and the insulation perfectly. I've bought and returned a few others because every time you try to crimp the insulation wings they fold over in random directions. these things do it straight without any additional pre bending or tinkering at all. Only single complaint is that occasionally the ratchet gets a bit jammed and you need to push a screw driver between the handles and then remember to realign the mechanism.

Great Minu tool, way more affordable than the 200 dollars one this one does the same for way much cheaper, really recomend

The only thing I have tried to crimp so far was JST-XH. I used the JST-XH connector assortment from woshilaoDS. The crimpers work beautifully. The jaws are very precise. If you are new to these connectors like I was, make sure you watch some videos and understand which side is the wire side of the jaw and which side is the insulation side so you get the terminals placed in the jaw correctly. The most challenging part of the process to me was getting the strip length on the wire correct, if I was doing very many of them I would definitely need to buy a stripper that could precisely set and reproduce the same strip length every time. I was just doing the stripping freehand. Anyway, zero complaints about these crimpers, they work great.

I have been using this crimper for years now. I believe I ordered this in 2022 if I recall, and I used it again just a few days ago right before 2026. So, annually, almost four years of use. Maybe, there is an accuracy issue. Maybe there are quality control issues. But I am a professional - and use wire crimping tools often. Maybe not this one specifically but I know my crimps. So unless I did something to set the wire incorrectly, I have a 100% success rate with JST-XH and the even smaller JST-PH connectors. This thing just works and I am very happy with this crimper. Because of my personal experience with this tool, this is the one I recommend to hobbyist who need something for their 3D printer JST-XH stepper wires because not only are my results repeatable but it is shockingly cheap for a tool. I work in Aerospace, and when I have Junior technicians / Engineering technicians I always ask one simple question: Do you know how to crimp wires? They always say yes, because it seems a simple task. But there is a small skill gap. You need to know what you are doing on some level or else your simple crimps will be bad. Without fail, every single time, these junior engineers cannot crimp properly - they do not know what they are doing. So when I see reviews stating this tool is bad, inaccurate, doesn't crimp, etc, my personal experience says it is the user and not the tool. Most users do not know how to crimp wires - even if they think they can.

Finally, a reliable crimper for DuPont pins. Have tried a number of others (including others from this brand) this was the only one that gives me at all consistent results, even with very fine gauge wire. I bought a second one for my field kit. You do need to bend the tabs on the typical pin to parallel, so they fit into the groove. (The generic pins usually have the insulation gripping tabs bent at very shallow angles) Would be helpful: if they labeled the slots (or included a slip of paper that translated from the marked units) with US wire gauges. Also helpful would be an insulation strip length gauge. The very finest slot seems to be for something other than a DuPont pin, but not sure what.