A push stick is a simple workshop safety tool that helps guide wood through a table saw while keeping hands away from the spinning blade. It gives the user a secure way to apply forward and downward force to a workpiece, especially when cutting narrow boards. This matters because table saw blades move at high speed and can cause severe injury in a fraction of a second.
A well shaped push stick improves both safety and cutting control.
Understanding Tools & Workshop Machines: Push Stick
A table saw cut depends on controlling the board in three directions. The fence sets the sideways position. The table supports the board from below.
The operator supplies motion toward the blade. A good push stick transfers force near the rear of the board, where it can keep the wood moving after the cut has nearly finished.
Its hooked end matters because a smooth end can slide off the wood at the moment pressure is most needed. The lower face of the stick should press firmly enough to prevent lifting, without forcing the board sideways into the fence or blade.
Friction explains why some pieces feel hard to feed. Friction force equals the coefficient of friction multiplied by the normal force. In simple terms, pressing down harder increases the force between wood and table, so the board is less likely to lift or chatter.
Too much downward pressure can make feeding difficult, especially on rough lumber. Waxed tables, clean surfaces, and straight boards reduce unwanted resistance. The goal is steady pressure, not a sudden shove.
Students should notice whether the board slides smoothly along the fence. A change in resistance can warn that the cut is starting to bind.
Kickback is one of the main hazards during a rip cut. The rear teeth of a spinning blade move upward toward the operator. If a board twists, closes around the blade, or moves away from the fence, those teeth can grab it and throw it back very quickly.
A riving knife helps keep the kerf open behind the blade. The kerf is the slot left by the cut. A blade guard can reduce contact with the blade, but neither device replaces careful feeding.
Stand slightly to one side of the board’s path rather than directly behind it. Keep the board held against the fence before the blade, during the cut, and until it has passed fully beyond the blade.
A push stick should be made from sound material with no cracks, loose parts, or slippery finish. Its handle needs enough space for a full grip. Its hook must fit the thickness of the workpiece and catch securely on the back edge.
Before switching on the saw, practice the full movement with the blade stopped. Plan where the push stick will go after the board clears the blade. Do not reach over or behind a moving blade to collect offcuts.
Use the fence for rip cuts and a miter gauge for crosscuts, never both together unless the saw setup is specifically designed for that job. These habits make the tool useful because they give the operator time and space to react safely.
Key Facts
- Use a push stick whenever the distance between the blade and fence is less than about 150 mm or 6 in.
- Forward force moves the board through the blade, while downward force helps keep it flat on the table.
- Friction force can be estimated by Ff = μN, where μ is the coefficient of friction and N is the normal force.
- Blade tip speed can be estimated by v = 2πrf, where r is blade radius and f is rotations per second.
- Kickback happens when the workpiece is thrown backward by the blade, often due to binding, twisting, or poor control.
- The push stick hook should catch the back edge of the board so the tool can push without slipping.
Vocabulary
- Push stick
- A handheld safety tool used to push a workpiece through a saw while keeping the user's hands away from the blade.
- Workpiece
- The material being cut, shaped, drilled, or otherwise worked on in a workshop.
- Table saw
- A workshop machine with a circular blade rising through a flat table surface to cut material.
- Kickback
- A dangerous event in which a saw blade catches the workpiece and throws it back toward the operator.
- Rip fence
- An adjustable guide on a table saw that keeps the workpiece aligned during a straight lengthwise cut.
Common Mistakes to Avoid
- Using fingers instead of a push stick near the blade is wrong because it places hands inside the danger zone where a small slip can cause injury.
- Pushing only sideways against the fence is wrong because the board may lift, twist, or bind instead of moving smoothly through the cut.
- Using a push stick with no rear hook is wrong because it can slide over the board and fail to push the workpiece securely.
- Standing directly behind the blade is wrong because kickback can send the workpiece straight backward toward the operator.
Practice Questions
- 1 A table saw blade has a radius of 0.125 m and spins at 3600 rpm. Convert the rotation rate to revolutions per second and calculate the blade tip speed using v = 2πrf.
- 2 A push stick applies a downward force of 25 N on a board. If the coefficient of friction between the board and table is 0.30, estimate the friction force using Ff = μN.
- 3 A student is cutting a narrow strip and says a push stick is only needed for the final few centimeters of the cut. Explain why the push stick should be used throughout the dangerous part of the cut and how it helps reduce risk.