Zero clearance table saw inserts and my Ridgid R4512 TS

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Forum topic by danoaz posted 346 days ago 967 views 0 times favorited 8 replies Add to Favorites Watch
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346 days ago

Topic tags/keywords: table saw zero clearance inserts ridgid 4512 table saw

I see the Youtube videos on making zero clearance inserts but I am not understanding what the issue is that people are trying to solve by making them. Can someone explain that to me?

Also, on my Ridgid R4512 table saw it has flat head screws attached to flanges under the metal insert that came with the saw. Anyone know what these are for? Are they to level the metal insert or for any future inserts that I might buy or make? I have never seen inserts that were screwed down but obviously I don’t know a lot.

Thanks in advance.

-- "Simplicity and repose are the qualities that measure the true value of any work of art." Frank LLoyd Wright

8 replies so far

View ChrisK's profile


1094 posts in 1708 days

#1 posted 346 days ago

The Zero Clearance is to help prevent tear out as the blade passes through the bottom of the material being cut.

-- Chris K

View Charlie's profile


1008 posts in 913 days

#2 posted 346 days ago

The R4512 is a bit more difficult when it comes to making your own zero clearance inserts because of the shape and flanges. With patience, it can be done.

what are they for?
A zero clearance insert prevents edge tear-out. You get a finer cut, with less of the “fuzz” at the edge. I’ve forgotten exactly what the inside of that throat plate area looks like on the R4512 but usually there is a means for leveling the insert to be flush with the table top.

View crank49's profile


3371 posts in 1598 days

#3 posted 346 days ago

The 4512 insert is not screwed down. The screws are to level the insert with the table.
The purpose of the insert has already been explained so no point in repeating.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View Jay Nolet's profile

Jay Nolet

74 posts in 666 days

#4 posted 346 days ago

I use my zero clearance insert so that narrow or just wee sized pieces of wood don’t go dimensional on me. With the insert, the pieces go thru the vortex and to the other end of the table saw. I typed tablesaw and spell check got me.

-- I think, therefore I think I am.

View wncguy's profile


200 posts in 939 days

#5 posted 346 days ago

I have a 4512 also & did not want to attempt creating my own zero clearance insert. Saw some comments on Leecraft & decided on them. Found that if you contact Ron Lee directly you can order 3 on a wholesale deal. I think it was $55 for 3 including shipping. Then you can set the up for various cuts.
If you don’t have contact info, I can provide it.
I was very happy with the inserts & service.

-- Any man can be a father, but it takes someone special to be a Dad

View ConstructionBoss's profile


13 posts in 656 days

#6 posted 310 days ago

wncguy, can you send me Ron Lee’s contact info?

-- -Brian, a.k.a. "ConstructionBoss" -

View wncguy's profile


200 posts in 939 days

#7 posted 310 days ago

Sure -
Ron Lee
office 770.983-1797
Cell 770.645-3629

You need to remove the riving knife before cutting the insert. Took me a while to figure out how to accomplish that. let me know if I can help.

-- Any man can be a father, but it takes someone special to be a Dad

View rg33's profile


51 posts in 629 days

#8 posted 310 days ago

I dont know that any one else has touched on this but the OTHER purpose of the zero clearance insert is dust control. I used to have a portable craftsman table saw that would send saw dust everywhere but into the bag on the bottom. After putting in an insert, saw dust became much more manageable

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