Size of gap in router table fence??

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Forum topic by groland posted 04-26-2017 04:00 PM 654 views 0 times favorited 3 replies Add to Favorites Watch
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221 posts in 4022 days

04-26-2017 04:00 PM

Topic tags/keywords: width of gap in router table fence

I am building a router table. I plan on having a fixed fence support in back and a sliding split pair of fences in front of that to vary the gap. What is the best width of gap for the fixed fence and base? 3”, 4” what? Why??



3 replies so far

View JBrow's profile


1368 posts in 1530 days

#1 posted 04-26-2017 04:17 PM


A quick look at MLCS’s web site for panel raising bits, probably the largest diameter bit that would be chucked into a router, revealed some bit sizes. Their largest diameter panel raising bits offer outside diameters of 3-1/2”. Therefore a maximum fence gap of 4” seems about right to me.

View Rich's profile


5153 posts in 1199 days

#2 posted 04-26-2017 04:19 PM

I’d go 4 inches. You don’t mention what lift you might be planning to install, but generally the opening (at least on my JessEm) is 4” to accommodate large bits, like panel raising. Even if you’re just going to mount your router under the table, you still want to be able to fit any size bit.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

View groland's profile


221 posts in 4022 days

#3 posted 04-27-2017 05:34 AM

Thanks very much guys! Four inches it is!George

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