John
When I cut hardwood stock 3/4 inches or thicker and over 4″ wide, I get a slightly cupped surface. Attached is a picture of my miter saw and stand. The saw is old but I have checked the pivot joint and there is no wobble. I have set a machinist square on the table and and the blade rotates in a straight line down the square. I use a 60 tooth dewalt blade made for miter saw use. The stock is always well supported and help tight.
My practice at this point is to make the cut long by less than the thickness of the blade then make a second pass to the line. This gives me a good square cut.
Dosen’t seem possible, but do you think maybe the blade is flexing?
Ric
sorry if this has been posted twice, think I hit the wrong button
Replies
No quick answer comes to mind, so I called a few saw blade experts and they all suggested something might not be right with the blade.
An alternative explanation is that the blade is shifting a bit to the side as the load increases causing the outer edges of the cut to flare in or out. Worn bearings, especially the thrust bearing, however it is set up in this saw, would allow the blade to move a bit to the side.
Sorry I can't offer a more exact answer, if you ever track down the cause I would like to know what you discovered.
John White
Thanks John for for taking the time to look into it. I also had a hunch that the blade was flexing and put the cheap conbination blade that came with the saw back on it. It did not seem to cup as bad as the good blade but it was hard to tell because the cut was so rough. In all fairness, that blade has several construction projects under it's belt. I doubt I'll find the answer, but this tool has well earned it keep and I'll be looking to replace it soon.
An aside.. A couple years back I purchased a really cheap 10" MS for my son who was building theater sets at the time. I have since been given it back and used it on my latest project. I've been amazed how well it works and accurate it is. I only paid $60 for it on sale and the one I'm looking to buy is nearly 10 times that cost. Go figure.
I've attached a pic of my current project.
Again, my thanks to you & FWW. Ric
A very pretty boat, you should be proud. I've never built a boat and am amazed at the ability of boatbuilders to construct something without a single straight line in it anywhere.
John W.
This forum post is now archived. Commenting has been disabled