Zero Clearance Inserts (ZCI)

dusty · Post by **dusty** » Thu Jan 17, 2013 8:20 am

How popular are Zero Clearance Inserts?

We all use Table Inserts but how many of us use ZCI?

Of those who use ZCI, how many of us make our own?

http://www.shopsmith.com/ownersite/cata ... nserts.htm

fredsheldon · Post by **fredsheldon** » Thu Jan 17, 2013 8:43 am

What is the advantage of a ZCI? I'm new to Shopsmiths so I don't have enough experience to realize the benefits of such items.

claimdude · Post by **claimdude** » Thu Jan 17, 2013 8:48 am

dusty wrote:How popular are Zero Clearance Inserts?

We all use Table Inserts but how many of us use ZCI?

Of those who use ZCI, how many of us make our own?

http://www.shopsmith.com/ownersite/cata ... nserts.htm

I have made several of my own over the years but grabbed 3 of the phenolic inserts from Peachtree last year while they were on sale for $9.99 ea.

Jack

wa2crk · Post by **wa2crk** » Thu Jan 17, 2013 8:52 am

Hi Dusty;
I use a ZCI about 80 to 90% of the time. I think that I only use the SS insert is when I make a bevel cut and need the extra clearance.
At Christmas time I make a bunch of doll cradles for the Toys for Tots program and the angle cuts (even though they are made at 90 deg) produce narrow triangular pieces that can get caught in the standard insert and I use ZCI's for these cuts.
I do make my own because I consider them expendable just like sacrificial fences.
Bill V

berry · Post by **berry** » Thu Jan 17, 2013 8:59 am

I use my SS for almost all my cutting. The exception is I break down sheet goods in the garage with a circular saw (I can't get a 4 x 8 sheet into the shop).

I make my own ZCI's from hardwood and use them all the time. I have 3 for dado set work and another for normal cross cuts and ripping. (By way of full disclosure - when making cuts with the dado set - technically it's a near ZCI. I select the one closest to the size I need. One accepts a 1/2 set, one 3/8 and the other 1/4. So in a shallow cut there's a gap at the front and rear of the cutter and if the cut is deeper, then the insert approaches zero.)

I've never made one for bevel cuts but the next time I go down that road I'll make one. I have one blank on hand. IMHO I think they add a lot to safe woodworking.

algale · Post by **algale** » Thu Jan 17, 2013 9:06 am

fredsheldon wrote:What is the advantage of a ZCI? I'm new to Shopsmiths so I don't have enough experience to realize the benefits of such items.

There are at least 2 advantages to ZCIs. First, by supporting the workpiece all the way to the cutting edge it minimizes chip out on the bottom surface of the work piece. Second, by closing the gap, it reduces the probability of cut offs being made into projectiles because the cut off can't fall down into the blade.

On the negative side, on a Shopsmith it eliminates the ability to adjust the quill to shave a hair off of a rip cut.

I keep telling myself to make some ZCIs for my Shopsmith but just never seem to get around to it.

Gene Howe · Post by **Gene Howe** » Thu Jan 17, 2013 9:16 am

For my 500, I made one with changeable inserts. The base part is MDF. Probably not the best but it was a proto. In use for 2 years now, though.
[ATTACH]19954[/ATTACH]

Randy · Post by **Randy** » Thu Jan 17, 2013 9:28 am

I only use one with my thin kerf blade.

bffulgham · Post by **bffulgham** » Thu Jan 17, 2013 9:34 am

Made 5 or 6 of them quite awhile back when I had some free time and some BB cut-offs.
[ATTACH]19955[/ATTACH]

For the next round, I plan on using these laminate planks left over from a flooring project.
[ATTACH]19956[/ATTACH]

I rough-cut them on the band saw and use a pattern bit in the router to cut to final shape...using a standard SS insert for the pattern.

Not only do they keep slivers and cut-offs from dropping inside, and reduce chip-out on the bottom; they also seem to make dust collection work better.

dusty · Post by **dusty** » Thu Jan 17, 2013 9:34 am

fredsheldon wrote:What is the advantage of a ZCI? I'm new to Shopsmiths so I don't have enough experience to realize the benefits of such items.

The answers have already been provided by others but:

I began using ZCI to protect from clip out when working with MDF that had been veneered.

The fact that chips and cutoffs cannot get down into the lower saw guard only to be kicked back at the operator encouraged me to continue their use.

I have the cut line marked on my ZCI which helps me to line up for a cut.

It is my opinion that dust collection is improved when I have the ZCI installed. However, what does not get collected in the lower saw guard tends to ride with the currents and comes back top side (in your face). This can be avoided by using the upper saw guard.

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Zero Clearance Inserts (ZCI)

Zero Clearance Inserts (ZCI)

Yep, me too