TD330 Features

Coming Soon
The Leigh TD330 makes great fitting classic dovetails quick and easy.



Precision Injected Molded Template

TD330 Precision Injected Molded Template

The TD330 Template is made of injection molded glass reinforced nylon, then CNC machined to precise tolerances.

Leigh Brand Router Bits

Two ½” shank Leigh brand router bits are included with Leigh Through Dovetail Jig, Model TD330: A ½” 8º Dovetail bit and a ½” straight bit. These carbide-tipped router bits are among the best you can buy, made with C2 or C3 micro-grain carbide. Each bit is honed with 600 grit diamond wheels for smooth, efficient routing.


Wide Range of Cutting Depths

Wide Range of Cutting Depths

Make through dovetails in any depth from 1/8” to 13/16”. The two images below show different cutting depths.

Join Boards of Different Thicknesses

The pin and tail boards do not have to be the same thickness. For example drawer fronts are often thicker than the drawer sides. Join boards of different thicknesses, from 1/8” (3,2mm) to 13/16” (20,6mm).

Different Thickness

Thick pin board and thin tail board.

Different Thicknesses2

Thin pin board and thick tail board.

Rout Through Dovetails in Two Simple Steps

Rout Through Dovetails

Tail boards are routed first with the included 8º dovetail bit. The TD330 will accommodate boards up to 12-7/8" (327mm) wide and from an incredibly thin 1/8” (3,2mm) up to a massive13/16" (20.6mm) thick.

Matching pin boards are routed next
Pin boards, the other half of the joint are routed next, with the included 1/2" (12.7mm) straight bit. Pin and tail boards may be different thicknesses.

Works on a Workbench, Router Table and Portable Workmate

 in a vice on a workbench
or on a portable workmate

The TD330 jig can be clamped to a board mounted in a vice on a workbench or on a portable workmate.

or on a portable workmate

When the TD330 is used on a router table, the jig is turned upside down and the workpiece is clamped to the jig.

Great Joint Fit with Patented Leigh eBush

The included patented elliptical e10 eBush guide bushing makes joint fit easy.

U.S. Patent No. 8,256,475
UK Patent No. GB2443974
Canada Patent No. 2,611,232
Patented Leigh eBush
eBush Design The barrel of the e10 is elliptical (A), unlike plain circular guide bushings (B). When rotated, the effective diameter of the barrel changes, allowing fit adjustments as small as .001" (0.025mm).
eBush Adjustment Simply rotating the guide bushing to a higher or lower number changes the joint fit by an incredible 0.001" (0.025mm). All routing starts with the e10 in the no.5 position. Turning the e10 toward the “10” position (A) results in a tighter fit. Turning it toward the “0” position (B) results in a looser fit.

Adjustable Side Stop

The adjustable side stop positions the tail board (A) and the pin board (B) when mounted in the jig to ensure good joint alignment.

User Made Beam  

Clamping and Mounting

Clamping and Mounting

Workbench Operation Pin and tail boards are mounted in a vice or portable workbench. Leigh recommends quick grip clamps to clamp the jig to the board. Clamps not included.

Workbench Operation Pin and socket boards

Router Table Operation Pin and tail boards are mounted to the beam with quick grip clamps. Clamps not included.

User Made Beam

User Made Beam

The template and side stops attach to a simple user made beam of MDF or common 2x4.

Technical Specifications
Through Dovetails
A Tail Board Thickness1/8" (3.2mm)13/16" (20.6mm)
B Pin Board Thickness1/8" (3.2mm)13/16" (20.6mm)
C Board Width1-1/4" (3.2mm)12-1/2" (317mm)
D Pin Centers1-1/4" (3.2mm)
Leigh D4R Pro Through Dovetail Jig specification

Bit Cutting Depth Range: 1/8" to 13/16" (3.2mm to 20.6mm)

Through Dovetails

Length: 15.75" (40cm)Length: 16-1/2" (419mm)
Height: 0.40" (1cm)Height: 6-1/2" (165mm)
Depth: 3.75" (9.5cm)Depth: 2-1/2" (64mm)
Weight: .36lbs (.16kg)Weight: 1.8 lbs (.82 kg)

TD330 Jig includes:
• Jig Template
• Two Side Stops
• 1/2" (12.7mm) Straight Bit
• 1/2" (12.7mm) 8° Dovetail Bit
• e10 Elliptical Guide Bushing
• Illustrated User Guide
• Pin Wrench
• 9 Screws

Leigh D4R Pro Dovetail Jig in the box

Your router and/or router table must accept the Leigh e10 guide bushing: Industry standard 1-3/8”(35mm).


Leigh Dovetail & Box Joint Jig Comparison
See comparison overview
See detailed comparison chart