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How to Make Accurate Crosscuts on a Table Saw

By: Rob Petrie
Get cleaner, more accurate table saw crosscuts with a few simple upgrades. A better miter gauge fence, zero-clearance insert, stop block, and crosscut blade can dramatically improve your results.

Making a crosscut on the table saw sounds simple: Set the board against the miter gauge and push it through the blade. But getting a cut that's square, splinter-free, and exactly the right length takes a little more care.

A few simple table saw accessories can make a big difference. An auxiliary miter gauge fence provides better support, a zero-clearance insert reduces tearout, and a stop block makes it easy to cut multiple parts to exactly the same length. Pair those with the right table saw blade and you have a reliable setup for clean, accurate crosscuts.

Here are four ways to improve your table saw crosscuts.

1. Add an Auxiliary Fence to Your Miter Gauge

The standard face on a table saw miter gauge is often fairly short. Attaching an auxiliary fence provides a larger, continuous surface for supporting the workpiece.

The fence doesn't need to be complicated. A straight strip of plywood works well. I make mine long enough to extend past the saw blade.

When the blade passes through the auxiliary fence, it creates a kerf that shows exactly where the blade will cut. More importantly, the fence supports the workpiece on both sides of the blade, helping minimize tearout as the cut is completed.

The longer fence also provides better support for positioning the workpiece.

One additional improvement is to apply a strip of self-adhesive sandpaper to the face of the fence. The added friction helps prevent a workpiece from shifting sideways as you make the cut.

Check the Miter Gauge for Square

An auxiliary fence can improve the cut, but it can't compensate for a miter gauge that's out of alignment.

Before making critical crosscuts, verify that the miter gauge fence is square to the saw blade. For furniture parts that need to fit precisely, even a small error can become noticeable during assembly.

2. Use a Zero-Clearance Insert to Reduce Tearout

A clean crosscut depends on supporting the wood fibers as the blade passes through the workpiece.

The throat opening in a standard table saw insert can leave a relatively large unsupported area alongside the blade. As the teeth exit the bottom face of the workpiece, the unsupported fibers can splinter and tear away.

A zero-clearance insert solves that problem.

The blade passes through a narrow kerf in the insert, leaving support immediately alongside the cut. This helps prevent fibers on the bottom face from breaking away.

The result is a cleaner edge with less splintering, particularly when crosscutting plywood and other materials prone to tearout.

Woodsmith Tip: A zero-clearance insert needs to match the blade and cutting setup you're using. Always make sure the insert is appropriate for the blade height and angle before making a cut.

3. Use a Stop Block for Repeatable Crosscuts

When several project parts need to be exactly the same length, measuring and marking every workpiece isn't the best approach.

Even careful measuring can introduce small differences from one piece to another.

Instead, use a stop block.

For longer workpieces, I use an L-shaped stop block clamped to the auxiliary miter gauge fence. The shape helps the block sit square against the fence while still making it easy to reposition.

Set the distance between the stop and the blade for the finished length you need. Then butt each workpiece against the stop before making the cut.

There's no need to measure each piece individually. Every workpiece references the same stop, producing a set of consistently sized parts.

This is especially handy when making multiples such as drawer parts, face-frame components, rails, or other repeated project pieces.

4. Use the Rip Fence Stop-Block Method for Short Pieces

Short workpieces present a different problem.

Positioning a stop block on the miter gauge fence can place the block—and your fingers—uncomfortably close to the saw blade. There's a better way to establish the length.

Flip the stop block around and clamp it to the rip fence ahead of the blade.

The workpiece starts against the stop block, establishing the correct length. As you slide the miter gauge forward, the workpiece moves away from the stop before it reaches the blade.

That detail is important.

By the time the cut is made, there's a gap between the workpiece and rip fence. The cutoff isn't trapped between the spinning blade and fence.

This setup provides the repeatability of a rip-fence reference without creating the dangerous situation that can occur when a crosscut workpiece remains trapped against the fence during the cut.

Woodsmith Tip: Never use the rip fence itself as a length stop for a crosscut if doing so will trap the cutoff between the blade and fence. Position the stop block well ahead of the blade so the workpiece clears it before the cut begins.

5. Choose the Right Table Saw Blade for Crosscuts

Technique and setup matter, but the saw blade itself has a major effect on cut quality.

A typical general-purpose table saw blade may have around 40 or 50 teeth. That's useful for handling a variety of ripping and crosscutting operations.

For especially clean crosscuts, however, a dedicated crosscut blade may have 80 or more teeth.

The higher tooth count means each individual tooth removes a smaller amount of material as it passes through the wood. Rather than aggressively tearing away the fibers, the blade takes many smaller cuts.

Tooth geometry also plays an important role.

Many crosscut blades use an alternate top bevel (ATB) grind. The teeth alternate their bevel direction, creating a shearing action as the blade moves across the grain.

Together, the higher tooth count and ATB grind can produce smoother cuts with less splintering and cleaner edges on both faces of the workpiece.

Crosscut Blade vs. General-Purpose Blade

You don't necessarily need to change blades every time you make a crosscut. A sharp, good-quality general-purpose blade can produce excellent results for everyday woodworking.

A dedicated crosscut blade becomes particularly useful when the quality of the cut matters most—such as when crosscutting finished project parts or materials prone to splintering.

A Simple Setup for Better Table Saw Crosscuts

You don't need an elaborate jig to make accurate crosscuts on a table saw. Start with a properly aligned miter gauge and add a straight auxiliary fence for better workpiece support. A zero-clearance insert helps control tearout, while a stop block makes repetitive cuts faster and more consistent.

For short parts, move the stop block to the rip fence ahead of the blade so the workpiece is free before the cut begins. And when you need the cleanest possible edge, a fine-tooth crosscut blade can make a noticeable difference.

Put these techniques together and you'll have a table saw setup capable of producing clean, square, repeatable crosscuts for everything from cabinet parts to furniture components.

Published: April 23, 2015
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