How To Deepen A Picture Frame's Rabbet Depth

How to Deepen a Picture Frame's Rabbet Depth

Deepening a picture frame's rabbet is a common task for framers looking to accommodate thicker mats, artwork, or glass. While seemingly simple, this requires precision and the right tools to avoid damaging the frame. This guide will walk you through the process, ensuring you achieve a clean, professional result.

Understanding the Rabbet

Before we begin, let's clarify what a rabbet is. A rabbet is a rectangular groove cut into the edge of the frame's molding. It's where the artwork, matting, and glazing are inserted and held securely. Deepening this groove allows for more substantial artwork or layers of matting.

Assessing Your Frame

Before you start any work, carefully assess your frame:

• Material: The frame's material (wood, metal, resin) dictates the tools and techniques required. Wood frames are the most common and will be the focus of this guide.
• Frame Size and Profile: The size and profile of the molding will influence your tool choices and the overall approach.
• Existing Rabbet Depth: Measure the current depth to determine how much deepening is necessary.

Tools and Materials You'll Need

You'll need the following tools for this project:

• Router: A hand-held router is ideal for this task, offering precision and control.
• Router Bits: A straight bit is essential. The bit's diameter will determine the final rabbet depth. Select a bit slightly smaller than the desired depth to account for the slight material buildup from the cutting process.
• Router Table (Optional but Recommended): A router table provides superior control and consistency, particularly for larger frames.
• Clamps: To securely hold the frame during routing.
• Safety Glasses: Always protect your eyes.
• Dust Mask: Wood dust is harmful; protect your lungs.
• Measuring Tape and Pencil: For precise measurements and marking.
• Chisel (for smaller frames): A sharp chisel can be used as an alternative for small, simple frames, but it requires more skill and precision.

Step-by-Step Guide to Deepening the Rabbet

This guide focuses on using a router; the chisel method will be outlined in a separate section.

1. Secure the Frame: Clamp the frame securely to your workbench. Ensure the area to be routed is accessible and stable.

2. Mark the Rabbet Depth: Use a pencil to mark the desired depth on the frame's edge. This serves as a guide for your router bit.

3. Test Cut: Start with a test cut on a scrap piece of wood of similar material and thickness to your frame. This allows you to adjust the router's settings and ensure you're comfortable with the process before working on the actual frame.

4. Routing the Rabbet: Carefully run the router along the marked line, making several shallow passes rather than one deep pass. This prevents tearing or chipping and provides better control. Maintain even pressure and a consistent speed.

5. Clean Up: Once the routing is complete, use sandpaper to smooth out any imperfections.

Deepening the Rabbet with a Chisel (for smaller frames)

This method is more labor-intensive and requires significant skill. It’s best suited for smaller frames with simple profiles.

1. Mark the Cut: Carefully mark the desired depth and width of the rabbet.
2. Score the Wood: Score the wood along the marked lines using the chisel.
3. Pare the Wood: Use the chisel to carefully pare away the wood, working in small increments. Avoid applying too much pressure to prevent chipping.
4. Sand and Finish: Once the desired depth is achieved, smooth the rabbet with sandpaper.

Post-Deepening Care

Once the rabbet is deepened, inspect for any imperfections and sand as needed. Apply a finish if necessary to protect the wood and match the existing frame finish.

Conclusion

Deepening a picture frame's rabbet can significantly enhance its functionality. By following these steps and prioritizing safety, you can achieve professional results and confidently display your artwork. Remember, practice makes perfect. Start with smaller, less valuable frames before attempting this on your prized possessions.