JessEm Spline Jig for Box Joint Jig (Metric)

• Reinforce mitred corners while adding an attractive decorative detail to finished projects
• Achieve consistent, accurately positioned spline slots across individual and repeat-production work
• Enjoy smooth, controlled operation for greater confidence when machining precise joinery
• Make adjustments and repeat setups quickly, reducing preparation time between operations
• Keep your router table workspace organised with convenient storage and versatile workholding options

Accurate Spline Joinery for Stronger Mitre Joints

Produce accurately aligned spline slots to reinforce mitred corners and add a decorative detail to your woodworking projects. The JessEm Spline Jig is designed for precision and repeatability when machining spline joints on a router table, making it particularly useful for decorative boxes, cabinetry, drawers, furniture and picture frames. Its carefully engineered design provides smooth operation and straightforward setup, whether producing a single bespoke piece or a series of identical components.

Designed for Existing JessEm Box Joint Jig Owners

This version of the JessEm Spline Jig is intended for woodworkers who already own the JessEm Box Joint Jig with its stainless steel mounting plate. It allows you to expand your existing setup to produce accurate, decorative spline joints without purchasing a second mounting plate. The stainless steel mounting plate is not included with this version.

Smooth-Running Bearing System

Four precision R4 bearings provide smooth, controlled movement across the router table, helping maintain accurate and repeatable spline slots with every pass. The bearing-guided design allows the jig to travel consistently, giving greater control over the machining operation and helping achieve uniform results across multiple workpieces.

Adjustable Stops for Repeatable Results

Four integrated adjustable stops make it straightforward to establish consistent spline positions. Once set, they help maintain accurate positioning across successive components, reducing setup time and improving repeatability when producing multiple mitred joints.

108mm (4.25") Travel with Full Router Lift Access

The jig provides 108mm (4.25") of smooth travel while retaining full access to the router lift. This allows you to adjust the cutter height or lock the lift without removing the jig or router insert plate, making routine setup adjustments more convenient.

MatchFit Compatible Workholding

A precision-machined dovetail slot accepts the MicroJig MatchFit Clamping System (sold separately), providing additional workholding options for different woodworking applications. This gives greater flexibility when securing components and configuring the jig for individual projects.

Convenient Workshop Storage

An integrated hanging feature allows the Spline Jig to be stored neatly on a workshop wall when not in use. Keeping the jig accessible but out of the way helps maintain an organised router table workspace.

Router Table Compatibility

The JessEm Spline Jig is designed for router tables fitted with a standard mitre track. For correct operation, the distance between the centre of the mitre track and the centre of the router bit must be between 107mm (4.2") and 196mm (7.7"). This version also requires the compatible stainless steel mounting plate supplied with the JessEm Box Joint Jig.

It is not compatible with the following router lifts and insert plates:

• Rockler Pro Lift
• Rockler SL Lift
• Kreg PRS3000 Router Lift
• Kreg Router Table Insert Plates
• Woodpeckers PRL-V1
• Woodpeckers PRL-V2
• Bench Dog 40 Series Router Lifts