A crosscut sled is one of the most important jigs you can build for your table saw. It holds the workpiece firmly, slides smoothly on hardwood runners in the table slots, and delivers perfectly square cuts every time. It is also significantly safer than using the miter gauge for crosscutting because the workpiece is fully supported and cannot shift.

Build a Table Saw Crosscut Sled

How It Works

The sled is a flat platform with a front fence and a rear fence. Two hardwood runners on the bottom fit into the miter gauge slots on the table saw. You place the workpiece against the rear fence, hold it in place, and push the entire sled through the blade. The blade cuts through the sled base (creating a kerf line) and through the workpiece.

Materials

1 piece of 1/2-inch Baltic birch plywood or MDF: 24x30 inches (the base)
2 hardwood strips for runners: 3/8 x 3/4 x 24 inches (sized to fit your miter slots)
2 pieces of straight, flat 3/4-inch plywood or hardwood: 3x30 inches (front and rear fences)
Wood glue and screws

Building Steps

Step 1: Make the Runners

Mill two hardwood strips (oak, maple, or UHMW plastic) to fit snugly in the table saw’s miter gauge slots. They should slide smoothly without wobble. Too tight and the sled binds. Too loose and the sled shifts.

Apply paste wax to the runners and slots for smooth sliding.

Step 2: Attach the Runners

Flip the plywood base upside-down. Position the runners to align with the miter slots, apply glue, and screw them to the base. Flip the sled over, set it on the saw with the runners in the slots, and verify it slides smoothly.

Step 3: Attach the Front Fence

The front fence is a strip of wood screwed to the front edge of the sled base. Its purpose is to hold the sled together and give you a handle to push the sled. Attach it permanently with glue and screws.

Step 4: Cut the Kerf

With both runners in the slots and the front fence attached, start the saw and push the sled through the blade, cutting a kerf line about two-thirds of the way through the base. This kerf marks the exact blade position.

Step 5: Attach the Rear Fence (The Critical Step)

The rear fence must be perfectly perpendicular (90 degrees) to the kerf line. This is what makes the sled produce square cuts.

Place the rear fence across the sled, roughly perpendicular to the kerf
Use the 5-cut method to dial in perfect square:
- Make a cut on all four sides of a rectangular test piece, rotating it 90 degrees each time
- After four cuts, measure across the fifth cut — any error is magnified by 4, making it easy to detect
- Adjust the fence angle and repeat until the fifth cut measurement matches the opposite side within 1/64 inch
Once perfect, glue and screw the rear fence permanently

Step 6: Add a Stop Block

Screw a T-track or clamp track to the top of the rear fence. A movable stop block on the track enables repeatable cuts — set the stop to your length and cut as many identical pieces as you need.

Using the Sled

Place the workpiece against the rear fence
Hold it firmly (or clamp it for small pieces)
Push the sled through the blade
Return the sled and remove the piece

Safety

Keep hands on the front fence and the workpiece, away from the blade path
Clamp small workpieces — never hold tiny pieces by hand near the blade
Never reach across the blade to retrieve a piece
Replace the sled if the base warps — a warped sled produces angled cuts
Wear safety glasses

The Impact

A crosscut sled produces cuts that are perfectly square, every time, without adjustment. It is safer than the miter gauge, handles wider boards, and enables repeatable cuts with a stop block. It is the single most valuable table saw accessory you can build.