Crimping Pliers for JST

These crimping pliers allow you to easily make your own wiring harnesses using crimp pins and cable housings. These are not a regular set of crimp pliers. These pliers are capable of crimping very small 1.00 - 1.9mm crimp pins. These work well with JST PH, SH, SHL, and ZH series pins as well as DF14 HRS and micro-latch from Molex. A similar set of crimpers from JST can be more than $400! We found these pliers to be very high quality at a great price.

Crimping Pliers for JST Product Help and Resources

Core Skill: DIY

Whether it's for assembling a kit, hacking an enclosure, or creating your own parts; the DIY skill is all about knowing how to use tools and the techniques associated with them.


Skill Level: Noob - Basic assembly is required. You may need to provide your own basic tools like a screwdriver, hammer or scissors. Power tools or custom parts are not required. Instructions will be included and easy to follow. Sewing may be required, but only with included patterns.
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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • Bratan / about 7 years ago / 1

    Despite what they say on the package, these are not great for JST PH series crimp pins. As someone already mentioned you will need to crimp twice, because dies are not wide enough to pinch both jacket and wire parts. Which is not that bad actually. More annoying is that after crimping jacket part is too wide to be inserted into housing, so every time you'll need to reshape it with small needle-nose pliers. And I mean every time... Also frequently crimping action will break the wire (I'm using 28-awg ribbon cable)... So it's better than nothing and probably very good for other type of crimp pins, just not ideal for JST PH.

  • Flynn / about 12 years ago / 5

    It would be cool if you could offer a little started kit of connectors so we could play with all the different types these support.

  • MEverett / about 12 years ago / 2

    Forgive my lack of knowledge when it comes to connector types. Will these crimp pins for standard 0.1" housings?
    For example, something like this?

  • Member #434451 / about 9 years ago / 1

    Do you have a set of pliers for tje JST PA series pins?

  • Member #80830 / about 10 years ago / 1

    I have a crimper from below link, best crimper for the jst ph contacts i have found

  • csquare / about 10 years ago / 1

    Will these work with the connectors found in the WowWee Robosapien V2 robot. If they do which connector should I get as well?

  • Poita / about 10 years ago / 1

    These are a fantastic crimper and a great price. We use them for JST crimps. They get a hammering at our workplace and are still going strong, just ordered 5 more.

  • project240dotnet / about 10 years ago * / 1

    Do these crimpers work with the 1.25mm Molex Picoblade pins? It seems that there are not many good/cheap options for working with the Picoblades, so it would be wonderful if these worked.

    EDIT: I found a pin-compatibility chart from the manufacturer which includes the Molex Picoblade, but no mention elsewhere in forums about how easy/effective they are.

    Engineer PA-09 Pin Compatibility

  • Member #368130 / about 10 years ago / 1


  • Member #336244 / about 11 years ago / 1

    Yes the price is right (I guess precision dies cost a bit to make!), if you're UK based & in a hurry, they can be bought this side of the pond too, for example...

  • Member #329167 / about 11 years ago / 1

    These are good quality crimpers, but when using them with the JST-RCY connectors, you do need to pre-squeeze the insulation retainer portion of the pin first. Otherwise, it is too wide to directly crimp in the largest die position. Other than that, very nice.

  • let me think of one / about 11 years ago * / 1

    Is the price correct? £37.23 seems a bit steep when I can get some for around £8 somewhere else. Evidently they're not the same standard, bu they do the job.

  • John Pilgrim / about 11 years ago * / 1

    Just received these today, a few days after receiving two other crimpers from Pololu.

    The Pololu crimpers $29.95 and $34.95 have a better build quality and a more advanced ratcheting mechanism, as well as being designed to crimp both the conductor and strain relief in one pass.


    • Member #16738 / about 11 years ago / 1

      Could you measure the barrel width of the pololu crimpers like the PA-09 shows in step 1-1, and put them on your site (or here?) That would be awesome.

      The PA-09 indeed works with JST-SH pins. But wow are those things tiny. Don't squeeze too hard or it flattens the barrel out and doesn't fit in the header. Took me 8 pins and two headers to get a single 4 pin header built :p

      • John Pilgrim / about 11 years ago * / 1

        conductor crimp widths : 1.41mm and 1.56mm for the TWO position crimper. AND 1.69mm, 1.93mm and 2.18mm for the THREE position crimper. I did not measure the strain relief crimp widths.

        For comparison, using the same method for the PA-09, I get 0.99mm, 1.41mm, 1.53mm, and 1.86mm for dies nominally "1.0mm", "1.4mm", "1.6mm" and "1.9mm" respectively

        I used my best caliper measuring technique, but the "inside" prongs on hand calipers are notoriously lacking in accuracy, and I don't have a set of precision gauges.


  • Dim_ON / about 11 years ago / 1

    Got them in the mail a couple of weeks ago. First impression: very sturdy action and soft, comfortable and grippy handle. Good quality rubber. Did a first crimping job today on crimp pins. Result - perfect! Very quick and precise.

    5 out of 5. "Made in Japan" still means something today.

    BTW: Looked for a similar tool in the Knipex lineup. Found only a combination of a tool and a special attachment for different pins. Very versatile, but the price for the 2 added up to nearly $600.

  • bode / about 12 years ago / 1

    These work amazingly well. They are not for production use but for prototypes they work awesome. You must crimp twice and be careful or you'll cut off the wire (the process is not easy, don't fool yourself). But eventually you can produce great cables for prototypes.
    I used the crimper on SPH-001T-P0.5L and SPHD-001T-P0.5L, part of the PAD connector series. Worked great. It is literally impossible without this tool (I tried, gave up and tried solder, and it was FAIL).

  • Kdiggity / about 12 years ago / 1

    Do these work with JST XH series conncetors?

    • Kdiggity / about 12 years ago / 1

      Not bad crimpers for $60. They won't beat a nice pair of Molex Crimpers ($300+) but they work for my side projects.
      I got them to work well with the Polarized Connectors (see products below). Now onto to connectors of choice - JST XH series.

      • SVFeingold / about 11 years ago / 1

        So did they work with the XH series of connectors?

        • SVFeingold / about 11 years ago / 1

          To answer my own question, I've received these and they do a fine job on the XH connectors.

          $60 is STILL far more than it could possibly cost to make these, but that is the world of crimpers, these work, and they're among the cheapest. So take it with a smile I suppose!

  • Bakker Leo / about 12 years ago * / 1

    Used this tool with various connectors e.g.
    And here is a compatibility chart from the manufacturer
    Works great after a little practice.
    You have to crimp twice. Much faster than soldering and more control (crimp both times with the correct diameter).
    Because the metal "flap" is curved inwards the connection becomes tight and strong.
    There is also a little larger version (PA-21) here with here a youtube instruction
    Regards, Leo

  • MattTheGeek / about 12 years ago / 1

    I don't understand what makes JST crimpers so expensive? I mean:
    Plastic $1
    Metal $5
    Tooling $10

    • schlick / about 12 years ago / 3

      You think $60 is high? try $925!!!

  • Norm! / about 12 years ago / 1

    I could have really used these a couple months ago when I made a VGA cable for my home server.

  • Nakor / about 12 years ago / 1

    I've just been using needle nose pliers and then soldering the pin and wire together but these would be nice to have.

    • I've used both and these are MUCH better. If you're going to use them a lot, it's worth the money.

  • Applekid / about 12 years ago / 1

    Any chance for a crimping tutorial? I've seen a few guides online but I still can't figure out why I only get 1 out of every 6 right, even with tons of practice. My finished connector blocks with crimped wires also come out terribly and I hate having to hot glue inside the access holes just to keep them from popping out of the housing when I plug/unplug.

    • There's a little mini picture tutorial on the back of the box. It's pretty easy if you have the right tools.

  • Added to the wish list !<br />
    <br />
    You know if it works for RC servo style crimps ?<br />
    <br />
    Regards,<br />

    • Ilektron / about 12 years ago / 1

      I have a similar pair of crimpers, perhaps slightly different, that is actually too narrow for standard servo connectors like futaba or hi-tec varieties. It still works, but you have to crimp twice for both insulation and conductor.
      What you want is something like
      for servo connectors.

      • Jakezilla / about 12 years ago / 1

        I use this for LiPo balance connectors and servo connectors all the time. I am the go-to guy at the RC track it seems like :D. At work I also use the Molex crimper that you linked to. I would have to say the fit and quality of the PA-09 (this one at SparkFun) is better. With the Molex we had to grind the top side down because it was too thick and you couldn't get a separate crimp on the insulation tabs and the contact tabs. Here is the link to the manufacture's site for detailed specs

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