# Jet table saw table out of tolerance

• posted on October 21, 2003, 3:57 am
Well, that last statement is a big assumption. I adjusted and tweaked and measured until I was blue in the face. Then I decided to check what I assumed was ok - the left edge of the main saw table. Boy was I in for a shock. I almost purchased a dial guage and fancy clamp just to accurately measure how closely things were aligned. But then I thought - "This is silly". Instead of that, I bought set of good ol' feeler guages and used my combination square. I discovered the sliding table was about 0.029" difference between the front and back side of the blade! Jet's maximum tolerance is 0.0118" for blade parallelism. I have not gone back to Jet technical service yet. They told me that this was a simple tuning problem and walked me through the procedure for aligning things (the ol' mark the saw tooth and measure against the same tooth front and rear).
I'm convinced that this is a manufacturing defect. Its as if the left side of the table never received a final machining. I did some gross measurements using a combination square and took some pictures to illustrate the problem. Admittedly, you cannot measure thousandth's of an inch with a cheap combination square, but it does hold a constant measurement when locked and relative measurement is what we are interested in. My pictures are at http://www.anneldavis.com/bobandanne/table%20saw.htm . If you have the patience to look these over, I'd appreciate any comments about my assessment.
Bob
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• posted on October 21, 2003, 11:28 am
Bob, I would get back with Jet. BUT, you may want to reread what you have written here and perhaps rephrase what your problem is. You are apparently not using the right descriptions to describe the problem. You indicate that the blade cuts deeper into the wood when you cross cut and push the wood into the rear teeth of the wood. A blade is round and probably cannot cut deeper into the wood at the back teeth. Perhaps you meant to say that the blade cuts wider at the back of the blade....I guess. It seems to me that if the blade is actually dead on parallel to the miter slot and the left side of the table is not parallel to the blade, you would need to put shims between the left side of the table and the slider setup, either at the front or rear to bring the slide path parallel to the blade.
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• posted on October 21, 2003, 2:20 pm
Leon,
Thanks for the critique. Yes, the choice of "deep" is not the right word, as this is normally associated with "depth of cut". What I meant to say was that the rear teeth cut further to left of the front teeth, instead of following same kerf cut by the front teeth.
Your analysis of getting things parallel is correct, except for how its done. The sliding table moves, so you don't shim it, like you would the right-side wing. You have to re-align the stationary part on which the sliding part runs. Jet provides adjustments to do this. However, I don't think they ever envisioned having to adjust the front to back more than a few thousandths of an inch. I've already moved the rear of the sliding table to the left 0.080 " and its still not lined up. I had to really force it to get that much adjustment out of it.
What gets me is that if I had bought the table without the sliding table or ever decided to revert to a fixed left wing, there is no way that a left side miter slot could be lined up without re-machining the left side of the main table.
I'm calling Jet back this morning and ask them what they recommend doing about it and if I should be concerned.
Bob

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• posted on October 21, 2003, 4:54 pm
FOLLOWUP:
This story has an extraordinarily happy ending. I sent the pictures I made, along with some drawings to explain the problem to Jet technical support via email. This was really tough to explain in words, but the pictures really helped. Two hours later, the technical support rep called and said my pictures and explanation were very good and showed a manufacturing defect.
Their solution: THEY WILL REPLACE THE WHOLE SAW! They will contact my local dealer and arrange the whole thing.
Jet has just created an incredibly loyal customer. I've called their support 4-5 times in the last month and I've found it to be excellent. I can't say enough good things about them.
Bob

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