You Just Bought Rough Lumber. Now What?
You’re standing in your workshop, looking at a beautiful but wildly uneven oak board. One face is crowned, the edges are wavy, and the thickness varies from one end to the other. This is rough lumber, straight from the sawmill, and it’s full of potential. But to turn it into the tabletop, cabinet door, or picture frame you envision, you need to transform it from a twisted, cupped piece of wood into a perfectly flat, square, and dimensionally precise blank.
This is where the dynamic duo of the woodshop comes in: the jointer and the planer. For beginners, these two machines can seem intimidating, even interchangeable. But understanding their distinct, complementary roles is the single most important skill for moving beyond pre-dimensioned store-bought wood and unlocking the true potential of raw lumber.
Using them in the correct sequence isn’t just a best practice; it’s the fundamental law of milling wood. Get it wrong, and you’ll fight your material, waste wood, and risk your safety. Get it right, and you’ll produce furniture-grade stock with machine-like precision. Let’s break down exactly how to use a jointer and planer together to master your material.
The Critical Difference: What Each Machine Actually Does
Before you touch a power switch, you must internalize the core function of each tool. Confusing them is the most common beginner mistake.
A jointer’s primary job is to create a flat reference surface. It has two tables—an infeed table and an outfeed table—with a spinning cutterhead between them. As you push a board across, the knives shave off the high spots, transferring the board’s bottom face onto the flat plane of the outfeed table. The result is one perfectly flat face. Once you have that, you can use the jointer’s fence to create a second face that is perfectly square (90 degrees) to the first.
In essence, the jointer establishes truth. It answers the question: “What is flat? What is square?”
A planer’s job is different. It makes a board a uniform thickness from end to end. It does not make a board flat. Think of it like a giant, automated thickness sander. A planer has a flat bed (the table) and a cutterhead above it. You feed the board in, and the rollers press it down against the bed while the cutterhead removes material from the top face.
Here’s the crucial insight: a planer will perfectly copy any shape presented to its bed. If you put a twisted board in with the twist facing down, the planer’s rollers will crush it flat against the bed, the cutter will make the top face parallel to that twisted bottom, and when the board springs back out, you’ll have a board of uniform thickness that is still twisted. The planer ensures parallelism, not flatness.
The Golden Rule of Milling Lumber
You must use the jointer first to create one flat face. Then, and only then, do you use the planer to bring the opposite face parallel to that first flat face, achieving uniform thickness. The sequence is non-negotiable: Jointer, then Planer.
Step-by-Step: Milling a Board from Rough to Perfect
Follow this six-step process every time. Always wear safety glasses and hearing protection, and ensure your machines are properly tuned before starting.
Step 1: Joint One Face Flat
Examine your rough board. Identify the face with the most obvious cup, crown, or twist. This will be your first face to joint. The goal is to remove just enough material to create a continuous, flat surface along the entire length.
Set your jointer’s cut depth to a light pass—no more than 1/16 of an inch to start. Position the board on the infeed table, concave side down if it’s cupped. Use push blocks for safety and control. Apply downward pressure on the infeed table as you start the pass, then transfer that pressure to the outfeed table once the board is over the cutterhead. Keep the board moving at a steady, consistent pace. Never stop on the cutterhead.
Make successive passes until the entire face shows a continuous, clean cut with no untouched low spots. You now have Face #1: your primary reference surface. Mark it with a pencil squiggle or a chalk “X”.
Step 2: Joint One Edge Square
Now, take the board to the jointer’s fence. Place the freshly jointed face (Face #1) firmly against the fence. The rough edge should be facing the cutterhead. Ensure the jointer fence is set to a perfect 90-degree angle to the tables.
Using push blocks and maintaining firm pressure into the fence, joint the edge. You only need to make enough passes to create a clean, straight edge that is 90 degrees to Face #1. You now have Edge #1, which is square to your reference face. Mark this edge as well.
Step 3: Rip to Rough Width on the Table Saw
With a jointed face and a jointed, square edge, you can now safely use the table saw. Place Face #1 down on the saw table and press Edge #1 firmly against the fence. This guarantees a straight, square cut. Rip the board to your desired width, plus about 1/8 inch extra to allow for final cleanup. This removes the rough, uneven wood from the opposite edge.
Step 4: Plane to Uniform Thickness
This is where the planer shines. Take your board to the thickness planer. Place it with the jointed Face #1 down on the planer’s bed. The rough, un-jointed face will be facing up.
Set the planer to take off about 1/16 of an inch. Feed the board into the planer, following the manufacturer’s instructions for feed direction and speed. The planer’s rollers will press the board flat against its bed (which is now referencing your perfectly flat Face #1) and shave the top face.
Make successive passes, lowering the cutterhead a little each time, until you reach your final desired thickness and the entire top face is clean. You have now created Face #2, which is perfectly parallel to Face #1. Your board now has two parallel faces and one square edge.
Step 5: Cross-Cut to Rough Length
Using a miter saw or a table saw with a crosscut sled, cut one end of the board square. Use your jointed edge (Edge #1) as a reference against the sled’s fence. Then, measure and mark your final length, and cut the other end square. You now have a board that is flat, straight, square, and cut to length.
Step 6: Final Clean-Up on the Jointer (Optional)
The edge you ripped on the table saw in Step 3 might have slight saw marks. For a perfect finish, make one final, light pass on the jointer. Place Face #1 against the fence and run the sawn edge over the knives. This will give you a glass-smooth, perfectly square final edge, completing your four-sided milling process.
Essential Machine Setup and Safety
Your results depend entirely on your machines being properly tuned. A misaligned jointer will create tapered boards, not flat ones.
Tuning Your Jointer
The outfeed table must be perfectly level with the cutting circle of the knives at their highest point. Use a straightedge to check. The fence must be square to the tables in both directions. Check this with a reliable machinist’s square. Dull knives will tear wood instead of cutting it cleanly. Learn to sharpen or replace them.
Tuning Your Planer
The planer bed must be clean and free of debris. Check that the rollers and feed mechanism are functioning smoothly. For snipe—those annoying grooves cut into the leading and trailing ends of a board—try supporting the board fully as it enters and exits, or adjust the infeed/outfeed roller pressure if your model allows it.
Non-Negotiable Safety Practices
Always use push blocks and push sticks. Your hands should never be in line with the cutterhead. Never joint a board shorter than the distance between the jointer’s infeed and outfeed tables. Never plane a board that is thinner than 1/4 inch or shorter than about 12 inches unless using a specialized sled. Remove all knots, nails, or foreign objects from your lumber. Know where your emergency stop is.
Troubleshooting Common Problems
Even with careful technique, issues can arise. Here’s how to diagnose and fix them.
My Board is Still Twisted After Planing
This is the classic sign of skipping Step 1. You put a twisted board into the planer without first creating a flat reference face on the jointer. The planer made the top parallel to the twisted bottom. Go back to the jointer, take lighter passes, and ensure you’re getting a truly continuous cut across the entire first face.
My Board is Tapered in Thickness
If one end of your board is thicker than the other after planing, your jointer’s outfeed table is likely too low or too high. When you jointed Face #1, you didn’t create a flat plane; you created a slight angle. The planer then faithfully copied that angle. Re-tune your jointer tables.
I’m Getting Severe Tear-Out
This is usually caused by dull knives, feeding the board against the grain, or taking too deep a cut. Check your knife sharpness. Examine the wood grain direction and try feeding the board from the opposite end if possible. Always take lighter, more frequent passes, especially with figured wood.
My Jointer is Creating a “Snipe” or Dip at the End of the Board
You are likely releasing downward pressure too soon as the board leaves the outfeed table. Maintain firm downward pressure on the outfeed table until the entire board has completely cleared the cutterhead. Using a longer push block can help with this.
Advanced Techniques and Considerations
Once you’ve mastered the basic work flow, you can tackle more complex scenarios.
Milling Very Thin or Short Stock
You cannot safely joint or plane very small pieces. The solution is to use a sled. For the jointer, attach a thin piece to a longer, flat carrier board using double-sided tape. For the planer, create a simple sled from MDF. Attach your workpiece to the sled with shims and hot glue. This provides the necessary mass and length for the machines to handle safely and accurately.
Dealing with Highly Figured or Difficult Grain
Wood like birdseye maple or interlocked grain can be prone to tear-out. The keys are extremely sharp knives, very shallow cut depths (1/32 inch or less), and a slow, steady feed rate. Sometimes, a helical or spiral cutterhead, which makes many small slicing cuts instead of few large impact cuts, is worth the investment for these woods.
Face Jointing Wide Boards
Most benchtop jointers have a 6-inch wide capacity. What if your board is 10 inches wide? You can sometimes joint one half of the width, then flip the board and joint the other half, carefully blending the seam. A more reliable method for wide panels is to use a router with a long straight-edge bit and a flattening jig, or a dedicated wide-belt sander.
Unlocking the True Potential of Your Woodworking
The ability to confidently use a jointer and planer transforms your relationship with the craft. It moves you from being a consumer of pre-sized materials to a master of your medium. You gain the freedom to select lumber for its grain, character, and story, not just its dimensions. You save significant money by buying rough stock. Most importantly, you build with a foundation of precision that makes every subsequent step—joinery, assembly, finishing—infinitely more successful.
Start with soft, straight-grained wood like poplar to build your confidence. Focus on the sequence: jointer for flat and square, planer for parallel. Tune your machines, respect their power, and practice the motions. The reward is the feel of a perfectly milled board in your hands, ready to become something extraordinary. That’s the moment you stop just building projects and start building furniture.
