4 Tips for Tight-Fitting Kreg Joints

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4 Tips for Tight-Fitting Kreg Joints

We get a lot of questions in our Customer Service Department about the best practices for creating a tight-fitting Kreg Joint. Here are four easy tips that will ensure you create tight, strong joints with your Kreg Jig®.

Cut Your Pieces Square
Cut Your Pieces Square Image One of the best things about Kreg Joinery™ is that it means you don’t have to cut complicated “woodworking” joints. You just cut your pieces to size, usually with straight, square cuts. Of course, for the joints to fit together right, you need to make sure that those cuts are truly square.

Whether you’re using a miter saw, table saw or circular saw, start by making sure that the blade is cutting square through the thickness of the piece, as shown in the illustration. If this angle is off, you’ll end up with a joint that’s not flat, or with a gap in one face of your joint. To eliminate those problems, make sure the blade is adjusted so it sits exactly 90° to the base or table.

Set the Blade Height RightNext, you need to check that make sure the blade is cutting square across the width of the piece. If this angle is off, you’ll end up with a joint that’s not square or that has a gap in one edge. Again, you need to make sure the blade is at an exact 90° angle. On a miter saw, the fence usually doesn’t move, so you’ll need to adjust the blade.

On a table saw, you’ll adjust the angle of the miter gauge until it sits square with the blade. If you set your miter gauge at 90° and the cuts still aren’t square, you may need to make some adjustments to the saw.

Square Cut ImageA circular saw presents a challenge, since it’s tough to make a prefect cut freehand. To get around this, you can use a helper to guide your saw. A speed square will do the job, or you can get a tool like the Kreg Square-Cut. It positions your blade and provides a fence for the saw to ride against.


Create Custom Storage
Set the Jig & Bit Correctly Image Once you have your pieces cut correctly, you need to set up your Kreg Jig® to drill the pocket holes in the proper position. Thankfully, the process is easy.

Start by adjusting the Drill Guide Block (or the Positioning Sliders on the Kreg Jig Jr. ®) based on the thickness of the wood you are using. The thickness settings are clearly marked, and the setup is explained in your owner’s manual. Just remember that you need to use the actual thickness of your wood, not the nominal thickness. For example, a 2x4 board has an actual thickness of 1-1/2".

Set the Jig & Bit Correctly Image 2Next, set the Depth Collar on the drill bit. Again, you’re setting is based on the thickness of your wood. You’ll find a drill bit setup gauge on the base of the Kreg Jig®, and inside the Kreg Jig Jr.® carrying case. The key thing to remember is to align the bit’s “step”—not the tip—with the markings.


Clamp Across the Joint Line
Clamp Across the Joint Line Image When you drive the screws into a Kreg Joint, they will pull the two pieces tightly together. Because you’re driving the screw at an angle, though, the screw may pull the pieces slightly out of alignment. If this happens, the faces of the two pieces won’t sit flush.

You can prevent this easily by clamping across the joint line. Kreg’s new Automaxx™ Clamps provide an easy way to clamp the joint and hold the pieces perfectly flush. You’ll notice that the clamps have clamp pads of two different sizes. Position the clamp so that the larger face is on the “show” side of the joint. Then just drive in the screws, and you’ll have a flush, tight joint.


Screen the Underside, As Well
Screen the Underside, As Well When you’re screwing the joint together, make sure you select the correct screw. Kreg screws are available in different lengths to work with different thicknesses. Selecting the correct length is easy, since it’s based on wood thickness, just like setting up the jig. Kreg screws are also available in fine thread and coarse thread. As a general rule, fine thread is best suited for hardwoods (such as oak, cherry, or maple), while coarse thread screws are best for softwoods (pine, fir, etc.)

You’ll find guidelines for selecting the right length screw in your owner’s manual, and at kregtool.com.

By following these simple tips, you’ll be able to create strong, tight-fitting joints quickly and easily using your Kreg Jig. If you have additional questions, you can contact Kreg Customer Service. You can also get access to lots of great advice and help by joining the Kreg Owners’ Community.


Kreg Automaxx Clamp

Kreg AK4MS Rebate

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From Kreg and Woodsmith Magazine
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2013 August Home Publishing

Kreg Tool Company
201 Campus Drive | Huxley, Iowa 50124
www.kregtool.com

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