How to Use a Wood Jointer

Woodworkers use jointers to create a flat edge, and correct cupping and twisting that occurs as boards dry. The blades, or knives, are narrow on a jointer, so they can only accept boards less than about 10 inches wide, although some jointers may accept slightly wider boards. The flat and level surface the jointer cuts becomes a reference surface for other cuts, as with a table saw. As with all woodworking power tools, safety should always be the primary concern when using a jointer.

Things You'll Need

• Board
• Push pads
• Ear and eye protection
• Dust mask or respirator

Instructions

1. Adjust the in-feed table to the desired height. The in-feed table is the one facing into the blades and is usually on the right-hand side as you face the front. The height will vary depending on the severity of the cupping or twisting, the type and hardness of the wood, the amount of refinement you want and the adjustment increments available on your particular model.

2. Set the fence to the width of the board you are cutting and check the placement and fit of the blade guard. Never operate a jointer without the blade guard solidly in place.

3. Put on your safety goggles or glasses and your ear protection. Inspect your dust collection system for blockages and turn it on if applicable. Put on your dust mask or respirator.

4. Turn on the jointer and place the board you are cutting on the in-feed table. Keeping firm pressure against the fence and the table with the push pads, push the board until it engages the blades. Use the push pads on top of the board whenever possible, rather than the side.

5. Remain on the in-feed table side of the jointer and continue pushing. When the board reaches the out-feed table, place one push pad on the out feed side and one on the in-feed side. Keep pushing at a steady rate with the push pads in this configuration until the board is past the blades. If the board is too long for the table, use stands to support additional length.

6. Examine the surface and cut again if necessary. If the cut is rough, adjust the in-feed table closer to the out-feed table and make another cut to smooth it out. You will know when you have removed the cupping or twisting because the sound from the blades will not change through the entire cut.

Tips & Warnings

• Observe all workshop safety guidelines when operating a jointer or any other woodworking power tool.

References

• The Complete Book of Woodworking; Declan O'Donoghue; 1997
• A Complete Guide to Basic Woodworking; Chris Marshall and Philip Schmidt; 2005