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Jet Pro Shop Table Saw Arbor Not Spinning

by lblankenship
posted 10-01-2018 02:12 AM


9 replies so far

View MrRon's profile

MrRon

5364 posts in 3546 days


#1 posted 10-01-2018 04:44 PM

I’m guessing the belt is a cogged belt, with teeth and you say it keeps on spinning even when the arbor is not. I can’t quite get my head around your problem. The saw cuts plywood with no problem? It stops when cutting 2x’s? You are not explaining it well enough for an answer. Contradictory terms!

View TheFridge's profile

TheFridge

10844 posts in 1789 days


#2 posted 10-01-2018 04:57 PM

If the arbor pulley isn’t spinning but the belt is then somethings wrong with the belt. Too loose is my guess. If the key was missing the pulleys would still turn. Unless it’s the pulley in the motor.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View MrRon's profile

MrRon

5364 posts in 3546 days


#3 posted 10-01-2018 05:17 PM

There is a pulley that has a vee belt and a cogged belt. the vee belt goes to the motor and the cogged belt goes to the arbor. My guess is the key in one of those pulleys has sheared, or a set screw is loose. This is just a guess from looking at the schematic.

View ocean's profile

ocean

144 posts in 1136 days


#4 posted 10-01-2018 06:33 PM

If all the above problems have been eliminated then I would say that the 2x material is pinching the blade enough to stop the blade and arbor. This is not all that uncommon with 2x material. As you cut the tension in the wood is released pinching the blade. Tighten the arbor nut and spread the saw kerf cut with wedges about every foot or less to prevent the pinching problem. You will likely need a second person to insert the wedges as you go. Be careful not to come close to the blade.

-- Bob, FL Keys

View DBDesigns's profile

DBDesigns

205 posts in 300 days


#5 posted 10-01-2018 07:22 PM

This is pretty obvious but is the blade tight to the Arbor? I didn’t see anybody mention that. Also, make sure you are using a high quality thin kerf blade to eliminate some of the pinching.

-- I remember when Grateful wasn't Dead

View lblankenship's profile

lblankenship

19 posts in 577 days


#6 posted 10-01-2018 07:34 PM

I spoke with someone from Jet today and he mentioned it might be the belt. I have the motor vee belt to be what I would consider rather tight. Looking at everything yesterday I took the belts off and checked them as well as the set screws but still had the issue. When turning the motor pulley by hand the arbor spins fine. I am using a Forrest 40 tooth crosscut/rip blade. Like I mentioned I can cut through thinner material such as sheet goods fine but it gets caught up on thicker stuff like 2xby material. If a key was broken would the arbor turn at all? I’m going to try and get a new belt and see if that helps.

Is it safe to assume the motor belt is probably slipping since I can rip thinner material, the arbor will turn by manually turning the motor pulley by hand and the belts still spin along with the motor running even though the arbor stops?

View TheFridge's profile

TheFridge

10844 posts in 1789 days


#7 posted 10-01-2018 08:20 PM

If they key was sheared or missing it would still get up to speed eventually. All depends on whether the pulley is turning with or without the arbor

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View lblankenship's profile

lblankenship

19 posts in 577 days


#8 posted 10-01-2018 08:24 PM

Okay, the blade gets up to speed at a normal rate. Could the belt just skip due to age? Like I mentioned I tightened and inspected the belt and it appeared to be fine (no teeth missing) the saw is about 5 years old and I’m not sure if it’s the original belt or not.

View DBDesigns's profile

DBDesigns

205 posts in 300 days


#9 posted 10-01-2018 08:32 PM

It would be weird for a key to sheer but it happens. I’m thinking it’s a good time to turn it upside down and give it a good run through and tune up. you’ll probably find your problem and be able to fix a few other things as well.

Taunton Press has a series of books on how to tune your tablesaw/ bandsaw/ jointer/ other machines. I have the tablesaw book but can’t find it on the web so I’m not sure if it is in print anymore. There is a lot of info out there though.

-- I remember when Grateful wasn't Dead

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