Hi, you may wish to hold the router still, (clamp in a vise of some sort), move the pipe over the bit. What type of bit are you using... straight, spiral? I prefer spirals.

 

Hi Tim

Sounds like it needs a bit of inside support ,,,(so it can't flex) I would try some dowel rod down the PVC pipe then tape the ends up so the dowel can move out of the pipe..until you have the pass done also just a small cut say about 1/8" deep..

You can also use a pair of 3/32" slot cutters on the same shaft to get the 1/2" wide slot...( on the router table) but again only 1/8" deep...

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Don't know if you have a bandsaw, but I cut a slot down the length of PVC pipe on mine. Just put a fence 1/2" (or whatever you need) from blade and then run the pipe through the blade. Worked fine, zero tearout.

 

Hi, you may wish to hold the router still, (clamp in a vise of some sort), move the pipe over the bit. What type of bit are you using... straight, spiral? I prefer spirals.

I tried that but there was to much movement in the pipe I could not get a clean cut.
Thanks
Timothy

 

I am unable to do that because it leaves a sharp edge.

 

Timothy, to make this work you must consider the forces exerted on the tubing. You need to get a small section of 4" x 4" perhaps 6" long. Drill a hole through it sideways that the PVC will just fit through. Clamp it to your fence and raise your bit up through it for the desired cut. Next you will need a dowel to fill the PVC from end to end. As you pass the PVC through the hole your cut will remove the material and the dowel and hole will keep it from shifting. Once finished remove the dowel and insert it in the next pipe. This method will guarantee uniform cuts.