SawStop Aftermarket Insert Concerns

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Forum topic by Randy Woodworker posted 11-15-2012 03:48 PM 2490 views 0 times favorited 3 replies Add to Favorites Watch
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Randy Woodworker

68 posts in 2352 days

11-15-2012 03:48 PM

Hi All,

I purchased the aftermarket aluminum SawStop insert from Infinity Tools. It is the one where you use replaceable strips for different widths of blades or dados instead of using a whole new insert for each. Great idea, however having taken a test drive last night I have some concerns about the safety of this product.

I tried using the insert and found that the slot at the back of the
mdf insert strip is too short to allow the insert to be used with the
guard in place.

A comparison between the stock
insert and the aftermarket one is shown below.

I cut a longer slot to accommodate the guard, but this left the insert
strip with no support behind the blade and allowed the narrow side of
the mdf strip to be loose in the slot.

I was thinking this was somewhat unsafe, as the flimsy narrow strip on the left
side of the blade could be easily thrown out of the insert by the
blade, especially since it may be pushed into the back of the blade.

This means that I cannot use this tool while using the guard unless I
use it without raising the blade to full height. I would only be able
to use about 1/2 height in my estimation. This restricts this tool to
use for dados only or for blades without the guard.

I bought this tool to be able to use zero clearance inserts for my
various saw blades, not just dados, and I wish to continue using the
guard. But now I am wondering if I just purchased a dado insert only.

Am I being overly paranoid here? What does the community think?

3 replies so far

View Kreegan's profile


1452 posts in 2170 days

#1 posted 11-15-2012 03:58 PM

The SawStop is a system. If you’re going to drop the money on it, you need to do so with the knowledge that you’re locked into that system for as long as you own it. No OEM accessories.


View Randy Woodworker's profile

Randy Woodworker

68 posts in 2352 days

#2 posted 11-15-2012 06:59 PM

I have contacted Infinity. I am awaiting their response. My post was mainly to get some opinions as to whether my perceptions about the potential safety concerns are over-the-top or whether others would share the same concern.

View GregD's profile


788 posts in 3159 days

#3 posted 11-15-2012 07:51 PM

I would be inclined to cut off that portion of the mdf insert and glue it into place. Make the cut at or a bit behind the arbor. New mdf inserts would have the corresponding piece removed before use.

Charles Neil also sells a ZCI for saw stop. I have one. His uses hardwood strips for the disposable insert. And I believe the disposable insert extends a bit farther to the left of the blade making that thin strip a bit wider. I’d expect hardwood to be a bit more durable than mdf, reducing the chance of that piece snapping off. I haven’t used it yet, except as a dado insert without the disposable insert, and I’m not so sure how to use it with the blade guard. It seems to be designed for use with the riving knife, but maybe I’m missing a trick.

At the moment I can’t imagine anything that would want to push this part of the disposable insert into the blade, so it might be fine as-is. It would also be fine, I would think, to simply remove that bit, so long as your off-cuts were going to be wider than 1/2”

-- Greg D.

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