|Forum topic by jfunk||posted 05-08-2012 03:59 AM||2924 views||0 times favorited||18 replies|
05-08-2012 03:59 AM
I have a Craftsman stacked dado set that I bought at Sears a few years back. It appears to be a rebranded version of this Mibro 8 inch set since the picture looks exactly like mine, except for the logo. I used it once when I got it on a $100 table saw and it seemed to work OK.
The other day, I tried it out on my new saw, a Craftex CT146, which is the same as a Ridgid TS3650. However, it didn’t go well at all. I noticed the dado it cut was too wide for the stack I set up. Then I noticed that the whole thing was wobbling slightly. I took the stack off and noticed that one of the side shims had fallen into a thread and was deformed:
I used a hammer to make it reasonably flat again and tried putting the stack together again. I was trying very hard to not to let a shim fall into a thread, but it seemed to just happen every time, as I was adjusting the blades and chippers. I did this 4 or 5 times with no luck. The whole stack always wobbled when I assembled it on the arbor.
I thought that maybe the blades had somehow gotten warped, but they appear to be perfectly flat. I even tried putting each blade on by itself and there was no wobble at all. It only happens when the whole stack is on.
As per the instructions, I kept the chippers at 90 degrees from each other and ensured that the teeth were not touching. After some research, I found that older TS3650s had a faulty arbor that caused trouble with stacked dado sets, but this arbor does not seem to have that specific problem.
Worst of all, I later noticed that the threads on my arbor have become damaged:
I guess I must have managed to get a chipper stuck into a thread, since I don’t really see a shim doing that kind of damage. Luckily, the damage is localized to the area taken up by the blade stabilizer, so it doesn’t interfere with the nut, and I haven’t been able to detect any runout.
Needless to say, I’m pretty disappointed by these events. I followed all of the directions I have. I Googled endlessly and couldn’t come up with anybody having the same wobble issues as I am having. I see that lots of people seem to be able to use these Mibro sets without issues, and I see lots of people are using dado sets on the TS3650.
Obviously, I have done something wrong. The problem is that I don’t know what that is.
Did I buy the wrong dado set for this saw? Did I miss some critical step? Would I have this problem with another set? I looked into the Freud Dial-A-Width, but my arbor is not long enough for it. Should I forget about dado sets on this saw altogether and just use a router?