Miter slot issues

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Forum topic by MAAD17 posted 06-23-2021 08:52 AM 243 views 0 times favorited 4 replies Add to Favorites Watch
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8 posts in 1535 days

06-23-2021 08:52 AM

I’ve had a RIDGID R4513 jobsite table saw (aluminum top) for a couple of years now. I’d never tried to truly fine tune it until now that I’m getting more serious about woodworking.

Recently, I bought an Incra V120 miter gauge. I tried adjusting the zero-play washers and got the middle region nice and snug with no side-to-side play, but still smooth movement through the range of the blade. But once I near the end of the slot, or pull all the way back to the start of the slot, the washers bind up on the miter slot. It’s not impossible to push/pull it through but it’s tight enough that it really slows down the movement to dangerous levels.

I checked the slot and the two ends are reading about .755ish but the middle region is reading about .765.

How can I reduce the play without hindering the movement forward? What are the best practices for this type of situation?

4 replies so far

View controlfreak's profile


2465 posts in 755 days

#1 posted 06-23-2021 09:45 AM

Have you tried waxing them?

View americancanuck's profile


475 posts in 3763 days

#2 posted 06-23-2021 10:00 AM

Use a very fine metal file and carefully take about .005” off each side off the slot on the offending ends. if the table is aluminum a file will remove material very quickly so be very careful and be sure to remove the same amount from each side.

-- Retired and lovin it

View MAAD17's profile


8 posts in 1535 days

#3 posted 06-23-2021 02:03 PM

Ok, I know I have some paste wax around here. I’ll try wax tonight.

The top is aluminum so if the wax doesn’t help enough, I’ll try the file. I’ve been too scared to touch it with a file for the reason you mentioned: the file will remove material quickly.

View splintergroup's profile


5430 posts in 2376 days

#4 posted 06-23-2021 03:29 PM

You also should determine which side of the slot is straight (use a quality straight edge for testing).

Hopefully it is the side away from the blade since this is the side the miter bar should ride against. The expanding washers (on the blade side for the left hand slot) just keep the bar forced against the straight side.

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