Reply by JayT

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Posted on Bench Dog / Rockler Quality- **BIG THUMBS DOWN**

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3887 posts in 1302 days

#1 posted 05-16-2013 09:10 PM

PurpLev is on it. I’ve talked to Kreg reps and that company designs the router plates with a slight crown in the middle for two related reasons—I’m assuming the other manufacturers do the same.

First is the weight of the router will pull it down. If it starts dead flat, you end up with a cup down after hanging a heavy router. They design based on the heaviest 3+HP units so a lighter one won’t affect it as much.

The second reason is so the cut will be uniform depth throughout. By having a slight rise at the point of the cut, you are guaranteed the board riding the highest spot and your depth setting will be precise. If there is any dip at all, the depth of cut will change as the board rides into and out of that dip.

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