1. Introduction
This manual provides instructions for the proper assembly, operation, maintenance, and troubleshooting of your STANLEY 1-12-004 Smooth Plane Bailey No. 4. This tool is designed for professional smoothing applications in woodworking. Please read this manual thoroughly before use to ensure safe and effective operation.
2. Safety Information
Always observe basic safety precautions when using hand tools to reduce the risk of injury.
- Wear appropriate personal protective equipment, including safety glasses, to protect against flying debris.
- Ensure the workpiece is securely clamped or held to prevent movement during planing.
- Keep hands and fingers away from the cutting edge of the blade.
- Always push the plane away from your body.
- Inspect the plane before each use for any damage or loose components. Do not use a damaged tool.
- Store the plane with the blade retracted or protected to prevent accidental cuts.
- Keep children and bystanders away from the work area.
3. Product Components
The STANLEY 1-12-004 Smooth Plane Bailey No. 4 consists of several key parts that work together for effective operation. Familiarize yourself with these components.

Figure 3.1: Overview of the STANLEY 1-12-004 Smooth Plane Bailey No. 4. This image displays the complete plane, highlighting its main body, handle, knob, and blade assembly.
- Body (Sole): The flat bottom surface that glides over the wood.
- Blade (Iron): The cutting edge that shaves wood.
- Chip Breaker (Cap Iron): Sits on top of the blade to curl and break shavings, preventing tear-out.
- Frog: The adjustable casting that supports the blade and chip breaker assembly.
- Lever Cap: Holds the blade and chip breaker assembly firmly against the frog.
- Lateral Adjustment Lever: Used to adjust the blade's cutting edge parallel to the sole.
- Depth Adjustment Knob: Used to control the depth of cut by moving the blade up or down.
- Handle (Tote): The rear grip for pushing the plane.
- Knob: The front grip for guiding the plane.

Figure 3.2: Close-up view of the adjustment mechanism on a Stanley plane. This image focuses on the depth adjustment knob and lateral adjustment lever, crucial for precise blade positioning.
4. Setup and Preparation
Proper setup is essential for optimal performance and achieving smooth, consistent results. New planes often require initial tuning.
4.1 Initial Inspection and Cleaning
- Unpack the plane and remove any protective coatings or packaging materials.
- Clean all metal parts with a soft cloth to remove manufacturing residues.
- Inspect the sole for flatness. While factory-machined, minor imperfections may exist. For precision work, flattening the sole on a flat surface with abrasive paper is recommended.
4.2 Blade Sharpening and Honing
The blade must be razor-sharp for effective planing. Factory edges may require further refinement.
- Remove the blade and chip breaker assembly from the plane.
- Sharpen the blade to the desired angle (typically 25-30 degrees for a smoothing plane) using sharpening stones or a sharpening system.
- Hone the blade to a fine edge using progressively finer grits, finishing with a strop if available.
- Ensure the back of the blade is flat and polished.
4.3 Chip Breaker Adjustment
- Attach the chip breaker to the blade. For fine work, position the chip breaker very close to the cutting edge (1/64" or less). For coarser work, it can be set further back (1/32" to 1/16").
- Ensure the chip breaker's edge is smooth and makes full contact with the blade to prevent shavings from getting caught.
4.4 Reassembly and Initial Adjustment
- Place the blade and chip breaker assembly onto the frog.
- Secure it with the lever cap, ensuring it is tight enough to prevent chatter but not overly tight to impede adjustment.
- Adjust the frog position: For fine cuts and hardwoods, move the frog forward to narrow the mouth opening. For coarser cuts and softwoods, move it back to widen the mouth.
- Use the depth adjustment knob to extend the blade slightly below the sole.
- Use the lateral adjustment lever to ensure the blade's cutting edge is parallel to the sole.
5. Operating Instructions
Once the plane is properly set up, follow these steps for effective planing.
- Secure Workpiece: Always secure your workpiece firmly using clamps or a workbench vise.
- Determine Grain Direction: Plane with the grain of the wood to prevent tear-out. Planing against the grain will result in rough surfaces.
- Grip the Plane: Hold the handle (tote) with your dominant hand and the knob with your non-dominant hand.
- Start the Cut: Place the front of the plane (toe) on the workpiece. Apply downward pressure on the knob as you begin the stroke.
- Execute the Stroke: Push the plane smoothly and consistently across the workpiece. As the plane moves, shift pressure from the knob to the handle to maintain even contact with the wood.
- End the Cut: Continue the stroke until the plane clears the workpiece. Lift the plane on the return stroke to avoid dulling the blade.
- Adjust Depth: Make small adjustments to the depth of cut using the depth adjustment knob. Aim for thin, consistent shavings for smoothing.
- Check for Flatness: Regularly check the flatness of your workpiece using a straightedge.

Figure 5.1: An assortment of Stanley planes on a workbench, demonstrating their use in woodworking. This image illustrates the context of using hand planes to create wood shavings and achieve smooth surfaces.
6. Maintenance
Regular maintenance ensures the longevity and performance of your plane.
- Cleaning: After each use, brush off wood shavings and dust. Periodically disassemble the plane and clean all components thoroughly.
- Rust Prevention: Apply a thin coat of camellia oil or a rust preventative to all exposed metal surfaces, especially the sole and blade, after cleaning.
- Blade Sharpening: Sharpen the blade regularly as it dulls. A sharp blade is safer and more effective.
- Lubrication: Apply a small amount of light machine oil to the adjustment screws and moving parts of the frog to ensure smooth operation.
- Storage: Store the plane in a dry environment. Retract the blade fully or use a blade guard to protect the cutting edge.
- Handle/Knob Care: Inspect the handle and knob for any cracks or damage. Replace if necessary.
7. Troubleshooting
Refer to this section for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Plane chatters or leaves a rough surface. | Dull blade, loose lever cap, frog not securely tightened, blade extended too far. | Sharpen blade, tighten lever cap, ensure frog is secure, reduce depth of cut. |
| Blade not cutting or taking very thin shavings. | Blade not extended enough, blade dull, frog set too far back (mouth too wide). | Increase depth of cut, sharpen blade, adjust frog forward to narrow mouth. |
| Tear-out or splintering of wood. | Planing against the grain, chip breaker set too far from the cutting edge, blade too dull. | Plane with the grain, adjust chip breaker closer to the edge, sharpen blade. |
| Plane veers off course or cuts unevenly. | Blade not parallel to the sole, sole not flat, uneven pressure during stroke. | Adjust lateral adjustment lever, flatten sole if necessary, maintain even pressure. |
| Shavings clog the mouth. | Mouth opening too narrow, chip breaker not properly set, wet or resinous wood. | Widen mouth by adjusting frog back, ensure chip breaker is clean and correctly positioned, clean plane frequently. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | STANLEY |
| Model Number | 1-12-004 |
| Type | Smooth Plane Bailey No. 4 |
| Material | Carbon Steel (Blade), Cast Iron (Body) |
| Color | Multicolor (typically black handles, silver body) |
| Product Dimensions (L x W x H) | 9.88"L x 5.67"W x 2.68"H |
| Item Weight | 1.92 Kilograms (approx. 4.22 pounds) |
| Power Source | Manual |
| Included Components | Smooth Plane |
| UPC | 604310237677, 027131845614, 798256198892 |
9. Warranty and Support
For information regarding warranty coverage, product support, or to purchase replacement parts, please contact STANLEY customer service or visit the official STANLEY website. Keep your proof of purchase for warranty claims.
STANLEY Official Website: www.stanleytools.com