Introduction: Make Improved Electrical Crimp Terminal Connections

Picture of Make Improved Electrical Crimp Terminal Connections

Crimp terminals and butt connectors are pretty common in electrical and electronic projects, but using them successfully on small wire sizes can be tricky.  And hookup wires for robotics and miniature controllers can be pretty tiny. Another common problem with crimp terminals is that with a bit of flexing, the bare wire can break right at the terminal.

Step 1:

Picture of

Parts and tools.
The "parts" involved are the small crimp style terminals and butt connectors often used in electrical and electronic projects. They are commonly aviailabe in three color coded sizes, red is the smallest, then blue, then yellow. Wire gauge size range is always shown on the packaging.
A crimping tool is available, but in a pinch the crimp can be made with your pliers.

Step 2:

Picture of

The problem:  Failures can occur from using too large a terminal for the wire size; using too much force on the crimping tool; and due to vibration breaking the wire right at the terminal.  Also, at times you want to use a butt connector to connect two different wire sizes.

Step 3:

Solution #1:  To ensure a better connection when working with small wire sizes, just strip the insulation a bit fmore and double over the wire connector, as in the photo. This provides more wire for the terminal to crimp onto. Ideally, the wire should be snug when inserted into the terminal.

Step 4:

Picture of

Sollution #2: Fix for wire fatigue and breakage at terminal:
The bare wire can break at the terminal, especially small wires ans any time there is flexing.
This can be solved by stripping about 1/2" of insulation, then winding the bare wire back around the insulation before inserting it into the terminal. The wire-over-insulation adds a lot of strength.

Step 5:


tinp (author)2015-11-18

Sometimes the solution to your problem is staring right at you! Neat tips, thanks!

Bill WW (author)tinp2015-11-18

I have always had to improvise in one way or another. Glad you could use the tip.


Bill WW (author)2013-06-06

Thanks, QSDR.

This tip has got me out of trouble several times.


QSDR (author)2013-06-06

great tip!

ArtisanEclectic (author)2013-03-15

Ditto what veloboy said. I was just looking at your page and you have a new follower.

veloboy (author)2012-07-09

That is a stroke of genius! Thanks for sharing :)

About This Instructable




Bio: I'm a retired mechanical engineer, woodworker, boater, and inventor. Now I'm getting into wood turning, and have found that all my wood projects ... More »
More by Bill WW:Make a Camera View-sight for Bird PhotographyHow does magnetic field vary with distance?Table saw sled for precise angled cuts
Add instructable to: