Lay out your line. Cut just outside the line with a jig saw and sand to the line.

 

Actually that is what I have been using...actually one of these...http://www.amazon.com/Rockwell-RK7321-BladeRunner-Wall-Mount/dp/B004AHKUY0

The wood is treated and sometimes wet and hard.

I need something that I can load on my table saw swivel and cut, some form of Jig.

thanks.
Al

 

Use an angle grinder or disk sander with coarse disk sandpaper. That will work it down quickly.

George

 

Angle grinder on wood?



Hmm an angle grinder? It I see lot's of smoke in my shop this way.
Maybe I can do it with a chop saw similarly.

I am looking for some type of jig though.

thanks
Al

 

What is you want to do...exactly?

Round the end is not very descriptive. :no:
Do you want a round end like a popsickle stick?
Do you want to round over the edges?
Post an image of what you want.


BTW, table saws don't do "round" very well, if at all.
A router will. A jig saw will. I don't see a "jig" unless it's for a router using a template.

 

Bit more info would be good, no use speculating, how it is rounded and how long the 2X4 is would help. For example rounding the end like a popsicle stick with a bandsaw on a 14' long 2x4 takes a lot of room, 2' long not so much.

 

Be sure to wear a dust mask when working with treated wood, the dust can be bad for you.

 

A band saw is ideally suited to the task you described. Though I would think twice about exposing my BS to wet pressure treated wood. Since the band saw is out, I would not use a table saw to cut a circle - you might get binding on the blade which will cause burning (bad with PT wood) or even worse an accident. So, the jig saw is your tool. With a bit of practice, you could get it very close with minimal sanding.

+1 on the dust mask when sanding. Do it outside, too.

 

For the record, is this what you are attempting to do?

 

Yeppers...I have a ton of these to do...Round the edge like a Popsicle stick only way thicker.

Im going out to play...I am building several folding picnic tables and need to make several of these....

 

You could dog ear the end with either a circular saw, hand saw or table saw (the latter with space permitting) and finish up with a rasp or by sanding. Cut to a line with a jig saw or use a template with a portable router. It all depends on whether you need to do this once or multiple times. With the router you may not have to do much sanding if you want it smooth. Always more than one way to skin a cat.

 

Even if the cut isn't perfect, a ROS and some 60 grit pads will make your cut snap to in a hurry. Same for an oscillating spindle sander.

 

I think a band saw would be perfect.

I hope you have one.

You mentioned you are making folding picnic tables. I imagine that means you've got a hole for a dowel at the center of this rounded end to make a hinge joint with another board.

You need to make a jig to do this easily on your band saw. Here's what you need:
First you need a band saw blade that has maybe 3-4 teeth per inch and is no more than 1/4" wide.
You need a sheet of plywood to cover your bandsaw table that has a dowel sticking up about an inch. The dowel should be the same diameter as your hinge dowels, but it would be nice to have a metal one for the jig. The plywood should be anchored to the bandsaw table. The dowel should be located so that it's center is 1 3/4" to the side of the bandsaw blade's teeth.
All of your 2x4s need to be pre-drilled for your dowel hole and the holes need to be centered on the board. If off-center, you'll have problems.
Then, just drop a 2x4 on to the dowel and swing the board around 180 degrees and you've got a perfect half circle end that's concentric with the drilled hole.