I'm going to run two out profiles on a U-1000. I want to split off the last bottom. I have used steel usually to do this, but am considering saws. 8000 rpm, poplar and hard maple. What do I need to consider with saws?
(Solid Wood Machining Forum)
From David Rankin, forum technical advisor:
When splitting on a moulder you are required by OSHA regulations to use an anti-kickback device, or to run separate outfeed rollers to control each piece after it is cut.
Knife versus saw blade. Depends on the thickness of the cut. We are cutting both ways with great success. With knives you can cut a medium to thick split. This works best for profiles that round over or angle toward the split. For profiles such as 2 x 6 material being split into 1-1/2 x 1-1/2 pieces, saw blades work best.
The secret is:
1. Saw needs to have the correct teeth. Do not use too many teeth. Normally 12 teeth is what I spec.
2. The fence of the moulder needs to be aligned exact.
3. The pressure shoe needs to hold the material. This may require a custom hold down shoe.
4. I do not run the last piece all the way through the splitter. This reduces the risk of a kickback.
5. I suggest that you consult a technician about your specific application to discuss any profile specific need.
I too would highly recommend an anti-kickback device. We don't want to hear of any accidents.
I would recommend avoiding splitting through the entire thickness of the wood, as this can easily overheat and damage the tool.