How to Align a Table Saw Blade and Fence

On this page (9 sections)

1. What does table saw alignment mean?
2. What should you do before measuring?
3. How do you check whether the blade is parallel to the miter slot?
4. How do you adjust a table saw blade?
5. How do you align the fence to the miter slot?
6. What mistakes can throw off an alignment check?
7. What should you check after alignment?
8. When should you check alignment again?
9. How to align a table saw: which gauge and steps should you choose?

To align a table saw, make the blade parallel to the miter slot, then set the fence parallel to that same slot. Choose a gauge that fits your saw, unplug the machine before measuring, and use the manual's tolerance and adjustment steps.

The miter slot gives you one steady reference for both checks. Align the blade first, because a fence aligned to a misaligned blade can still produce an uneven gap and an inconsistent cut.

What does table saw alignment mean?

Table saw alignment means the blade and fence run parallel to the miter slot. Checking each against the same slot helps you find whether the blade, fence, or both need adjustment.

If the blade shifts toward or away from the slot as it turns, the distance changes from front to back. A fence that angles toward the blade can narrow the space behind it, so check both parts instead of relying on how they look.

Start with the saw manual. It may specify a measurement method and tolerance that are unique to your model.

Check the adjustment points it specifies. For a broader overview, see our guide to choosing and setting up a table saw.

What should you do before measuring?

Disconnect the saw from power and keep it unplugged during alignment. Remove the guard only if the manual permits it, and reinstall all safety parts before cutting.

Clear dust and debris from the table and miter slot so they don't tilt the gauge. Check that the blade is seated securely and has no visible damage.

Raise the blade only enough to reach the measurement points, following the manual. Keep your hands clear of the teeth, and turn the blade by hand only if the manual says to do so.

Mark one blade tooth with tape or a marker. Use that same tooth for front and rear readings to reduce variation from measuring different parts of the blade plate.

How do you check whether the blade is parallel to the miter slot?

Compare the same marked tooth at the front and rear of the blade against the miter slot. A dial indicator gauge that travels in the slot can make this comparison easier to repeat.

Fit the gauge as its instructions describe. Place the indicator against the marked tooth near the front, note the reading, then move the gauge to the back without changing its setup.

Compare the two readings with the tolerance in your saw manual. If they differ beyond that limit, the blade assembly may need adjustment.

Keep the power disconnected throughout the check.

Which gauge helps you align a table saw blade?

Choose a gauge that fits the miter slot securely and lets you repeat the same measurement. Before buying, check the slot size and how the gauge is set up.

The A-Line-It Basic includes assembly hardware, a hex wrench, instructions, and a dial indicator with 1 in of travel and 0.001 in increments. Its bar is sized for most table saw slots, and the tool can also measure jointer depth of cut and help with planer alignment.

Pick it if you want one mechanical gauge for several shop machines. Skip it if you specifically want a digital readout or need a tool built around an automatic pin system.

The iGaging gauge is machined from hardened aluminum alloy. Its product information is sparse, so confirm the slot fit, display functions, and setup method before choosing it for your saw.

This is a reasonable option if you already know it fits your saw and prefer its digital format. Skip it if you need a clearly documented miter-slot fitting system or want more alignment features spelled out before purchase.

The Woodpeckers gauge includes a pin set and a dial indicator with 1 in of travel, a rotation counter, and 0.001 in graduations. It suits a woodworker who wants a dedicated gauge for checking both blade and rip fence alignment.

Choose it if quick slot fitting and organized storage matter to you. Skip it if you want a digital indicator or a simpler starter tool.

The Neoteck gauge has a stated measurement range of 0 to 1 in and resolution up to 0.0005 in. Its adjustable aluminum bars include multiple mounting holes for different blade distances.

Choose it if your slot meets the width requirement and you want a digital gauge with adjustable bars. Skip it if your slot is narrower than 3/4 in or you want a system that automatically fits varied slot widths without screw adjustment.

How do you adjust a table saw blade?

Use the method in your saw manual to bring the blade parallel to the miter slot. Adjustment points vary by model, so follow the manual instead of assuming every saw shifts the same way.

If the readings are out of tolerance, check whether the manual calls for moving the trunnion, table, or another part. Make a small adjustment, tighten the hardware as directed, and measure again.

Don't loosen unknown hardware or force an assembly into position. If the manual doesn't explain the adjustment or a part feels unstable, contact the manufacturer or a qualified repair professional.

After the readings are within tolerance, secure the adjustment points and measure again. Tightening hardware can shift the setting slightly, so use the final readings to confirm the result.

How do you align the fence to the miter slot?

Set the fence parallel to the miter slot after aligning the blade. Measure the fence at the front and rear of the blade using matching reference points.

A long straightedge can show whether the fence face tracks parallel to the slot. A dial indicator can give a repeatable comparison if it is set up to contact the fence according to its instructions.

Lock the fence and compare the measurements again. If the front and rear differ beyond the fence manual's tolerance, adjust the fence using its instructions, then recheck it while locked.

Avoid setting the fence by eye against the blade alone. The miter slot is the common reference that makes the blade and fence checks consistent.

What mistakes can throw off an alignment check?

A dirty slot, loose gauge, or changing measurement point can make readings unreliable. Clean the reference surfaces and use the same tooth and gauge setup for each comparison.

Don't mix measurements from different teeth or change the gauge angle between the front and rear readings. If you bump the gauge or lose contact with the blade, start that comparison again.

Don't chase tiny reading changes without checking the manual's tolerance. Make small adjustments, tighten the hardware, then repeat the full measurement so you know the setting holds.

What should you check after alignment?

Recheck the blade and fence after tightening every adjustment point. Restore the guard and other safety parts you removed, following the saw manual.

With power disconnected, check for contact with the insert, guard, or riving knife. Turn the blade by hand only if the manual permits it, and stop if anything catches.

The riving knife should track the blade as the saw maker specifies. Our guide to riving knives and splitters explains their different roles.

Make a cut only after restoring the saw to its normal safe setup. If the cut binds, the fence shifts, or the saw makes an unusual sound, stop and inspect it before continuing.

When should you check alignment again?

Check after moving the saw, changing parts, servicing the blade or fence, or noticing cuts that drift or bind. Your manual may also recommend a schedule or specify when to recheck.

Use the same method and reference points each time. Keep a note of the manual's tolerance and any adjustments, so you can compare later checks.

If the fence won't hold its setting, read our guide to table saw fence upgrades before deciding whether a replacement makes sense. If you change the insert, our guide to zero-clearance table saw inserts explains fit and purpose.

How to align a table saw: which gauge and steps should you choose?

To align a table saw, check the blade against the miter slot, adjust it to the manual's tolerance, then align the fence to that slot. Recheck both after tightening and restore the saw's safety parts before cutting.

Choose the A-Line-It Basic for a versatile starter gauge, Woodpeckers for automatic slot fitting and a fitted case, or Neoteck for a digital indicator when your slot is at least 3/4 in wide. The iGaging is worth considering when its fit and functions match your saw; compare table saw safety features before returning the machine to service.

Frequently asked questions

Should a table saw blade be parallel to the miter slot?

Yes. A blade parallel to the miter slot gives you a consistent reference for setting the fence and checking alignment.

Follow your saw manual for the allowed tolerance and adjustment method.

Disconnect power before measuring or adjusting, and rotate the blade by hand only as the manual permits.

How do you check whether a table saw fence is parallel?

Compare the fence face with the miter slot at the front and rear of the blade, using a reliable rule or alignment gauge. Make the measurements at matching points and follow the fence manual for adjustment.

A fence that locks differently at each end may need correction even if it looks straight.

How often should you align a table saw?

Check alignment after moving the saw, changing or servicing parts that affect the blade or fence, or noticing cuts that drift or bind. There's no single interval for every shop.

Your saw manual may give a check schedule or a tolerance, so use that guidance.

What tool do you need to align a table saw?

A dial indicator or table saw alignment gauge can compare the blade and fence with the miter slot. A straightedge and careful measuring can help with basic checks, but use a method your saw manual supports.

Confirm a tool fits your miter slot before buying it.