The Introduction of Finger joint cutter

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Product Introduction

Finger joint cutter is a router bit designed to cut a series of complementary, rectangular pins and sockets into the ends of wood pieces. When assembled, these parts interlock, creating a strong mechanical bond that is further reinforced with glue.

Primary Types of Finger Joint Cutters

A. Router-Based Finger Joint Jig & Bits

This is the most common method for home woodworkers and small shops. It involves a simple jig and a specialized straight bit.

The Bit: A standard straight flute router bit is used. The size of the bit determines the width of the fingers. Common sizes are 1/4", 3/8", and 1/2".
The Jig: The jig is the key component. It consists of a guide pin (or a key) that is the exact same diameter as the router bit. This pin is attached to a movable fence. After each cut, you move the workpiece over by the width of the guide pin to create the next finger. The jig ensures perfect, consistent spacing.

How it works with a jig:

The first board is clamped against the guide pin and cut.
The board is then moved so the newly cut slot fits over the guide pin, automatically positioning it for the next cut.
This process repeats across the end of the board.
The mating board is cut using the same setup, ensuring the pins and sockets interlock perfectly.

Summary: Which is Right for You?

Hobbyist / Occasional Use: A router table with a straight bit and a shop-made or store-bought jig is the perfect solution.
Small Professional Shop: A high-quality router jig (like an Incra) is an excellent investment for its precision and speed.
High-Volume Production: A dedicated finger joint cutterhead on a shaper or molder is the only way to go for efficiency.

For most people searching for "finger joint cutter," the router-based system is the intended and most practical answer. It's a fantastic way to create strong, beautiful, and traditional joinery.