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23YEARS
SKU: 100-040.JIG

Infinity Tools Tapered Dovetail Spline Router Jig Only

Regular price $79.90

Size

The Infinity Tools Dovetail Spline System makes creating beautiful and strong dovetail spline joints fast and accurate. The spline jigs come in two sizes and can be used at the router table or with handheld routers.

Our exclusive Tapered Dovetail Spline System is a surefire way to create distinctive-looking boxes in your shop. This system not only creates eye-catching dovetail spline joints, but reinforces the joinery on your projects.

The unique, tapered groove and spline fit together like hand in glove. The anodized, extruded aluminum router jig works with a brass guide bushing to create a tapered dovetail groove in the corners of your box. You can use a handheld router or a router table to rout the grooves.

Features Include:

  • Create beautiful, gap-free dovetail spline joints
  • Quality components for long life
  • Anodized aluminum router jigs for routing tapered dovetail grooves
  • Can be used with your handheld router or at the router table
  • Two router jig sizes for multiple design variations

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

Does this listing include the router bit and bushing?

This is the router jig only. It works with a brass guide bushing to cut the tapered grooves; if you want a complete set with a matched bit and bushing, see our router jigs & guides options.

What is the jig made of?

It's made from anodized, extruded aluminum, which provides a durable, protective finish for long life in the shop.

How many sizes are available?

The spline jigs come in two sizes, which lets you create multiple design variations across different box and spline proportions.

Can I use this with a handheld router?

Yes. The jig can be used with a handheld router or at the router table, so you can rout the grooves whichever way works best for your project.

What kind of joint does this make?

It makes a tapered dovetail spline joint — a decorative corner joint where a tapered spline fits a matching tapered groove. The fit reinforces the joinery while adding an eye-catching detail.

Why is the groove tapered?

The unique tapered groove and matching spline fit together like hand in glove, creating a tight, gap-free joint that both looks clean and strengthens the corner.

Does it need a brass guide bushing to work?

Yes. The anodized aluminum jig works together with a brass guide bushing to create the tapered dovetail groove in the corners of your box.

What projects is this jig good for?

It's ideal for distinctive-looking boxes and casework where you want reinforced, decorative corners. Pair it with other joinery jigs for more joint options.

Do I need anything else to use this jig?

You'll need a router (handheld or table-mounted), a compatible brass guide bushing, and a dovetail router bit to cut the tapered groove. Browse router templates and accessories to complete your setup.

Will the two jig sizes produce different looks?

Yes. Because the jigs come in two sizes, you can vary the proportions of the dovetail splines to suit different box sizes and design styles, giving you multiple decorative variations.