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SKU: 100-040

Infinity Tools Tapered Dovetail Spline Router Jig With Router Bit & Bushing

16% off
Sale price $89.90 Regular price$106.70

Size

Rout Perfect Tapered Dovetail Grooves for Spline Joinery!

These are the routing jigs included with our value-packed Tapered Dovetail Spline System packages.

Made from CNC-machined extruded aluminum then anodized for a protective finish, these router jigs create a precise, tapered groove for tapered dovetail splines. Includes Porter-Cable-style brass guide bushing and router bit.

12" Router Jig includes a 1/4"-shank, 1/2"-dia. x 1/2"-depth, 14° dovetail bit.

18" Router Jig includes a 1/2"-shank, 3/4"-dia. x 3/4"-depth, 14° dovetail bit.

PLEASE NOTE: The 18" Router Jig is required for making nested dovetails like those pictured here. This type of result is not possible with the 12" Router Jig.

Whether used in contemporary, or classic furniture, dovetail joinery is a highlight of quality woodworking.

Infinity Tools offers a large selection of dovetail bits designed with negative shear angle to provide ultra smooth cuts, and they’re available in all sizes and for all needs. But one thing that doesn’t change …  is the general shape of the bit. The weakest point of all dovetail router bits is their neck. To get the longest life possible from this type of bit, we recommend pre-plowing the groove before cutting the dovetail slot. 

Pre-plowing is the concept of using a straight bit (sized smaller than the diameter of the neck) to first cut a clearance channel. Start by finding the diameter of the neck of the dovetail bit using a caliper.  

Then you locate an appropriate straight bit slightly under the diameter of the neck of the dovetail bit. Use that straight bit to set up the plowing cut.

You make a first pass with the straight bit to remove much of the waste. Remember don’t run this straight bit too fast. Let the bit cut. 

The dovetail bit is then used to follow through that channel, but the stress on the bit is greatly reduced, leading to better dovetail cuts … and a longer life for your dovetail bits! 

Follow this simple tip and you'll get the best performance from your dovetail router bits. 

Frequently Asked Questions

What's included with this router jig?

Each jig includes the anodized aluminum router jig, a Porter-Cable-style brass guide bushing, and a dovetail router bit matched to the jig size.

What's the difference between the 12" and 18" jigs?

The 12" jig comes with a 1/4"-shank, 1/2"-dia. x 1/2"-depth, 14° bit, while the 18" jig comes with a 1/2"-shank, 3/4"-dia. x 3/4"-depth, 14° bit. The 18" jig is also required for making nested dovetails.

Which jig do I need for nested dovetails?

You need the 18" Router Jig for nested dovetails. This type of result is not possible with the 12" Router Jig.

What shank size is the included dovetail bit?

It depends on the size: the 12" jig includes a 1/4"-shank bit, and the 18" jig includes a 1/2"-shank bit. Both bits cut a 14° dovetail. Browse more joinery router bits.

Can I use this at the router table or only handheld?

Both. The jig works with a handheld router or at the router table, so you can choose whichever method suits your setup and project.

What is the jig made of?

It's CNC-machined from extruded aluminum and then anodized for a protective, durable finish.

What angle does the dovetail bit cut?

Both the 12" and 18" jigs come with a 14° dovetail router bit, which creates the tapered groove that gives this joint its hand-in-glove fit.

What is a tapered dovetail spline joint?

It's a decorative, reinforcing joint where a tapered dovetail-shaped spline is fitted into a matching tapered groove in the corner of a box. The taper locks the spline tight for a gap-free, eye-catching result. See related dovetail joinery tools.

Is the brass bushing compatible with my router?

The included bushing is a Porter-Cable-style brass guide bushing, which is the most common bushing standard and works with router bases that accept that style of guide.

Are these the same jigs in the complete spline system packages?

Yes. These are the routing jigs included with our value-packed Tapered Dovetail Spline System packages. Explore more router jigs and guides for additional joinery options.