RJ45 Crimping Tool

G'day! You're in the middle of a job. You've just run a new Ethernet cable from the NBN box to your home office, and now you're faced with the fiddly bit: putting that little clear plastic plug (the RJ45) on the end.

It's bloody tempting to just try and jam the wires in and squash the plug with a pair of pliers, "she'll be right," yeah?

Wrong, mate. That's a one-way ticket to a dog's breakfast of a connection. It'll be slow, flaky, and will probably stop working the second you look at it funny. To do this job properly, you need the one and only tool for the job: the RJ45 crimping tool.

So, What is an RJ45 Crimping Tool, Exactly?

An RJ45 crimping tool (or 'crimper') is a specialist hand tool that looks a bit like a futuristic pair of pliers. Its one and only job is to perfectly attach an RJ45 plug onto the end of an Ethernet cable (like your Cat6 data cable).

A good one often does three jobs:

1. Cuts: It has a sharp blade to cut the cable to length.
2. Strips: It has a (sometimes average) stripper to remove the cable's outer jacket. (A separate rotary stripper is often a better bet, but this'll do in a pinch).
3. Crimps: This is its main, all-important job.

When you squeeze the handles, it performs two critical actions at the same time: it pushes the eight tiny gold pins down through the insulation to pierce the eight individual wires, and it pushes the plastic strain-relief clip down to grip the cable jacket, so it can't be pulled out.

The Golden Rule: Why You Can't Just "Have a Go" with Pliers

A proper RJ45 crimping tool applies precise, even pressure across all eight pins at the exact same time.

If you try to use pliers, you'll be a one-man wrecking crew. You'll crush the plastic plug, you'll push some pins in too far, others not far enough, and you'll end up with a knackered connection that'll have you tearing your hair out trying to find the fault. You must use the right tool.

The Quick 'How-To' for a Schmick Crimp

Righto, so you're ready to have a crack at making your own patch lead? Here's the quick and dirty:

1. Strip the Outer Jacket: Carefully strip about 3cm of the outer (e.g., blue) jacket off the cable, being careful not to nick the little wires inside.
2. Untwist and Order: This is the most important bit. Untwist the four pairs of wires. In Australia, the standard we use 99% of the time is T-568B. You need to flatten those wires out and get them in this exact order (from left to right, with the plug's clip facing away from you): White-Orange, Orange, White-Green, Blue, White-Blue, Green, White-Brown, Brown.
3. Trim and Shove: Hold the wires flat and in order. Use your crimper's flat blade to cut the ends off perfectly straight, leaving about 1.5cm of wire. Shove them all the way into the RJ45 plug until you see the copper ends hit the front. Make sure the outer jacket is inside the plug, under the strain-relief.
4. Crimp it! Shove the plug into the 8P8C (RJ45) slot on your RJ45 crimping tool and give the handle one good, firm squeeze until you hear it ratchet all the way. Pull it out. You beauty! You're done.

The CRITICAL Safety & Compliance Warning: DIY vs. Pro

This is where we get dead serious, mate.

• DIY: Making your own "patch lead" (a cable to go from the wall plate to your computer) is a great DIY job. Go for your life.
• PRO ONLY: Want to install a new data point? This means running a data cable inside your walls, floor, or ceiling and terminating it at a wall plate.

In Australia, this is strictly not a DIY job. Any fixed data, communications, or telephone cabling must be installed by a licensed cabler (registered with ACMA).

Why? It's the law, mate. A dodgy data install (especially with cheap gear from a non-specialist supplier) can create interference (messing up your and your neighbour's NBN) or, worse, if it's run too close to 240V power without proper separation, it can become a serious electrical hazard.

A Professional Job Needs Professional Gear

A licensed cabler or licensed electrician knows that a rock-solid, high-speed network relies on high-quality, compliant components from end to end. They get their gear from a trusted electrical wholesaler. As one of Australia's most comprehensive electrical wholesaler and supplier networks, Schnap Electric Products stocks the lot for the professional installer. They've got a massive range of professional-grade RJ45 crimping tools, data cable testers, and, just as importantly, the high-quality, compliant Cat6 cable, RJ45 plugs, and wall jacks (mechs) that a qualified professional needs to do the job right. For a connection that won't let you down, the pros start with quality gear from a supplier like Schnap Electric.