CNC Spoilboard Surfacing Router Bits, 1/2 inch Shank 2 inch Cutting Diameter, Slab Flattening Router Bit Planing Bit Wood Milling Cutter Planer Woodworking Tool by NITOMAK (Carbide)

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Reiterating what has been said and adding a bit to bring all the tips together in one place: Your guide rails have to be very straight, parallel to each other, and well anchored in place. The range includes tungsten carbide router bits which are suitable for use on softwoods, hardwoods, plywood and some plastics. So it was a surprise how pernickety it was when I had to do a big slab of oak, which was rather precious to its owner.

The 1" diameter bit has a cutting depth of 19/32" and an 8mm diameter shank that is 28mm long; the 1 1/2" diameter bit cuts up to 11/16" deep and is available with an 8mm diameter shank (34mm long) or a 1/2" diameter shank (1 11/32" long). You don't know if or when the router bit will grab the board and try to snatch it from you, and with a bit this large the amount of grab could be very high indeed. wings make a fast and clean cut on your project material, great for projects of any level of complexity. If you think you might use a router again in the future it would definitely be a worthwhile purchase even if it sits around for months.And it could project the workpiece towards the operator, not away, leading to a kickback-like injury to your torso. Regardless of the router itself I always recommend a 50% (1") wide pass at a maximum of 1/8" depth with the Mega Dado. It looks to me like either the slab or the router/sled is not staying level as you move it or at least between passes.

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You'll be working blind, so you can't see in real time what the bit is doing and whether a problem is occurring that can't be heard but only seen. I’m getting ready to build a router sled to flatten slabs and other boards, I don't have a jointer big enough. While these difficulties can undoubtedly be resolved it's a lot of futzing about when the stated goal is to make the job easier.