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Pololu item #:
1929
Brand:
Generic
This crimping tool can be used to crimp both male and female versions of our JST RCY connector crimp pins, JR crimp pins, Futaba J crimp pins, and crimp pins for 0.1″ housings onto 20-28 AWG wires to make custom cables. The crimping die has a width of 4 mm, and the tool offers ratcheting action for increased consistency and ease of use.
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Crimping tool: 0.08-0.5 mm² capacity, 20-28 AWG. |
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Crimping tool: 0.08-0.5 mm² capacity, 20-28 AWG. |
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Preparing a wire and crimp pin. |
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Aligning the crimp pin in the tool. |
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Correctly crimped 0.1" housing crimp pin using the narrower (0.08-0.5 mm²) crimping tool with two cavities (product #1929). Note that only part of the wire barrel is crimped. |
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Note: This crimping tool is 3 mm narrower than our more versatile 0.1-1.0 mm² capacity crimper, and it does not crimp the full extent of the wire barrel on the JR, Futaba J, and 0.1" housing crimp pins (see the picture at the bottom of this page). It still makes a sufficient electrical connection between the crimp pin and the wire conductors, however, and the uncrimped portion of the wire barrel will be fully concealed by the connector housing.
We also have a more versatile, wider (7 mm) crimper that can additionally crimp Tamiya and mini Tamiya connector crimp pins. Because the more versatile tool is wider, it can crimp the full wire barrel on the 0.1" housing crimp pins rather than just part of the wire barrel. You can use the following table to help you decide which cavity of which crimping tool you need:
| Tool | Cavity | Crimp Pins | Wire Gauge (AWG) |
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| Crimping Tool: 0.1-1.0 mm² Capacity, 16-28 AWG | Outer | 0.1" Housing Female 0.1" Housing Male JST RCY Female JST RCY Male JR Female JR Male Futaba Female Futaba Male |
26-28 |
| Middle | 22-26 | ||
| Inner | Tamiya Female Tamiya Male Mini Tamiya Female Mini Tamiya Male |
16-20 | |
| Crimping Tool: 0.08-0.5 mm² Capacity, 20-28 AWG | Outer | 0.1" Housing Female 0.1" Housing Male JST RCY Female JST RCY Male JR Female JR Male Futaba Female Futaba Male |
26-28 |
| Inner | 22-26 |
Prepare the wire by stripping about 1/8" (3 mm) of insulation from the end. Place the wire in the crimp pin, lining it up so that the stripped portion lies between the inner set of tabs on the crimp pin, while insulated wire lies between the outer set of tabs.
Tip: Instead of removing the crimp pin from the reel by breaking it off at the base (as intended), it can be helpful to leave a small tab on the back of the crimp pin to help you line it up and hold it in place while crimping, as shown in the pictures below. Then, you can remove the tab after it is crimped.
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Place the wire and crimp pin on the appropriate tooth of the tool’s die, making sure that the insulated end is on the raised and wider half of the tooth. The tabs should point toward the cavity on the other side of the die so that the tool bends them inward around the wire when it closes. The picture below shows our more versatile crimping tool, but the procedure is the same for this crimper.
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Close the jaws of the tool slowly and completely until they release. The tabs on a properly crimped pin should form one barrel around the wire conductors and another barrel for strain relief around the wire insulation. When using this narrower crimper on the JR, Futaba J, and 0.1" housing crimp pins, only part of the wire barrel gets crimped, but it is still enough to make a sufficient electrical connection to the wire conductors, and the uncrimped portion of the wire barrel will be concealed by the crimp pin housing. This tool is wide enough to crimp the full wire barrel of the JST RCY crimp pins.
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Tip: The strain relief barrel sometimes ends up a little overly flattened, making it too wide to fit comfortably into the crimp pin housing. In such situations, you can use a pair of pliers to gently squeeze the wider axis of the barrel into a more cylindrical shape that will slide easily into the housing.
One of our customers has made a very nice video tutorial that talks about how to make custom cables with our pre-crimped wires and with self-crimped wires. The section on using our crimping tool starts at approximately 4:15 and shows the process in detail. One of our distributors has also made a short video tutorial that shows how to use our crimping tool. Both videos demonstrate how to use our wider crimping tool, but the technique is the same for this narrower crimper.
This useful inspection chart (pdf) by JST shows properties of good and bad crimp connections to look out for when checking your own connections.
This useful inspection chart by JST shows properties of good and bad crimp connections to look out for.
This video, created by customer Derek Molloy, discusses various options for making custom cables with our crimp connector housings, such as by using our pre-crimped wires or crimping your own with our wider crimping tool, though the same technique works with our narrower crimping tool as well. The section on using the crimping tool starts at around 4:15.
This video, created by our distributor, Proto-PIC, shows how to use our wider crimping tool, though the same technique works with our narrower crimping tool as well.
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