Reply by mantwi

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Posted on Issues with router table extension and sacrificial fence...

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312 posts in 2633 days

#1 posted 06-12-2014 04:11 AM

You were feeding the workpiece the wrong direction. A router that’s used freehand rotates counterclockwise. When a router is inverted the bit is now spinning clockwise. When you tried to feed the work between the fence and the bit it was pulling the workpiece forward and caused excess pressure that snapped the shank. It takes a lot of pressure to snap a 1/2” shank by the way. As already suggested you need to feed the workpiece against the rotation of the bit and burying the bit is a sacrificial fence face is the safest way to accomplish this. I’d also remove the material to be wasted to within an 1/8” of the finished cut with a handsaw. You definitely need a sled that rides against the fence and acts as a backer board to prevent the inevitable tear out you’ll get without one. Look at the way your feed a hand held router into the work. If you feed it right to left (or clockwise) you are feeding against the rotation of the bit. This is the correct way. If you feed it left to right (counter clockwise) the bit will be grabbing the work and propelling itself. That’s a climb cut and it’s a very unsafe practice. The one exception is when you want a super smooth surface right off the cutter you leave a 32nd or so remaining on your initial pass then use the climb cut technique to remove the rest. Because the depth of cut is so shallow you can control the feed and safely route in the wrong direction. Remember when you turn a router upside down it changes the feed direction. God bless and be safe. By the way, Craftsman bits are terrible. In fact just about everything branded Craftsman that has to do with woodworking is low quality. If it doesn’t have a lifetime guarantee don’t buy it from Sears tool department.

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