The Oak Park fences are Polyethelene, and they work very well. It is a stable material
and will not hurt the router bits, as you make clearance in the fence for the
bit that you may be using.
Thanks for the reply. Both HDPE and UHMW-PE are type of polyethylene (high density and ultra-high molecular weight). I think UHMW is about twice the price of HDPE, but I was unsure if there are any problems with just using HDPE.
I personally find MDF faces on aluminum angle works quite well. Even without formica facing it slides pretty nicely, you can bury your bits into it and replace it economically, and if you split it down the middle, you can shim behind it and make an easy jointer fence.
Before I have used a jointed 4x4, scraps of hardwood scewed to my tablesaw fence, you name it it works. My favorite feature of the router workshop is that they can turn out quality items without a $400 fence or a $300 router lift. Simple really works.
Hartville Tool sells a kit for less than $25 that includes a 48"x4x 3/4 of UHMW it includes all hardware (nuts and bolts). I can't locate any info on the other material similar to this. MDF should work as well as anything else but I think I would rout dados and use T track instead of routing T slots in the MDF itself. There are several businesses on the web Hartville and Rockler have loads of gadgets for routers. Their catalogs are free and very interesting reads. I have no connection to either company just my personal experience.
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