LumberJocks

Help for new table saw user!

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by PSL posted 04-15-2012 11:51 PM 1693 views 0 times favorited 9 replies Add to Favorites Watch
View PSL's profile

PSL

2 posts in 978 days


04-15-2012 11:51 PM

Topic tags/keywords: tablesaw blade question

Hello all,

New to woodworking and Lumberjocks.

Trying to figure out what’s going on with my new Ridgid R4512, (only 35 days old used only on a few small projects)

After running great for weekend projects over the last thirty days it suddenly started making a “loud” squeal on startup. This is a high pitched chatter or whine that last one to two seconds then the saw runs quite as usual.

I did a search on numerous sites and followed the advise offered for this type of problem: checked the belt, re-tightened the belt, used belt dressing, checked the arbor for free movement with out the belt, checked the bolts/washers holding the blade…

While checking the saw I began to rotate the blade rotating it back and forth several inches in each direction. I moved the blade around the different points of the blade so I could rock it back and forth around the whole rotation of the blade.

What I found was that at one point on the blade, as I rotate the blade rapidly back and forth there is a metallic grating sound. At first I was sure there was something rubbing against the blade as it sounds like a metal on metal scraping sound. I checked and the blade is completely free and clear…

I don’t know if this metallic sound is normal or, is this what’s causing the screeching on startup…

Any thoughts or help would be greatly appreciated. For what it’s worth the saw works great. Cuts like a champ. I just don’t know if the sounds foretell of a problem or not.

I can always return the darn thing to HD but seeing as how I’ve added a router table and modified the wings to just were I want them I’d rather not repeat all that work if anyone has a thought on the problem.

Thanks.


9 replies so far

View knotscott's profile

knotscott

5601 posts in 2120 days


#1 posted 04-16-2012 12:37 AM

Just a guess….sounds like it could be bad bearings to me.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View BernieMay's profile

BernieMay

24 posts in 1782 days


#2 posted 04-16-2012 01:04 AM

The screeching sounds like a loose belt between motor and arbor. the metalic sound could be bearing in arbor or motor.

View Lee Barker's profile

Lee Barker

2169 posts in 1595 days


#3 posted 04-16-2012 02:12 AM

Bernie brings up a possibility I hadn’t considered—a motor bearing. By loosening and removing the belt, you could isolate that.

Belt dressing is tricky stuff. Most belts and pulleys don’t want it; in some cases it can be sticky enough to make the belt not want to let go of the pulley and you get slapping and pulsing (depending on what kind of motor mount).

I think your turning the arbor manually revealed the source of the noise: A failed bearing.

So now it’s time to weigh the guarantee, if any, against the likely downtime if you get it repaired by the seller.

I am not familiar with that saw and how easy it is to get to the bearings, but many LJs have done this replacement so if your decision is to replace the bearings yourself, I suggest you start a forum thread asking for experience on your kind of saw.

Manufacturers are tending to cut more and more corners these days, and even if they’re saving only a couple bucks on bearings on a given saw, that’s real money when you multiply it times the number of saws manufactured in a day.

I hope you can get it up and humming quickly.

Kindly,

Lee

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View RussellAP's profile

RussellAP

2966 posts in 1031 days


#4 posted 04-16-2012 03:25 AM

A couple of questions.
1, do you use dust collection on the saw?
2, did you install the dust collection port on the bottom of the saw, that black bottom with a 5” hole in it?

If you noticed the directions when you put the saw together, it said that if you install the dust collection system (DC) you need to be sure and hook up the DC to the saw or it’s a fire hazard.

It could be that the saw motor got encased in dust and got too hot.

I did put the dust port on my 4512 and I don’t use DC but I do make sure and clean it out every time I use it.

Just a thought.

And Welcome to LJ.

-- A positive attitude will take you much further than positive thinking ever will.

View oluf's profile

oluf

257 posts in 1784 days


#5 posted 04-16-2012 03:26 AM

I would remove and replace the blade. The nut may be loose and the blade slips on the arbor shaft on start up. It’s worth a try.

-- Nils, So. Central MI. Wood is honest.Take the effort to understand what it has to tell you before you try to change it.

View PSL's profile

PSL

2 posts in 978 days


#6 posted 04-16-2012 04:34 AM

Thanks to all for the input.

I was using the saw today and noticed a slight metallic grating sound now creeping in while the blade spins down after shutting it off. It seems like its a bad bearing…

I did concert the dust port, and no I was not using dust collection… I checked the motor and it doesn’t seem encased in dust but may have ingested more than I can see from the exterior.

The more I listen to it, the more it seems to be coming from the arbor bearings… Just seems surprising to have failed in only 30 days. I guess you get what you pay for.

I am going to exchange the saw at HD as its in warrantee. Other than the lack of dust collection that might have overheated the motor, is there anything I could do, with normal use and what seemed to be proper set up and limited use to damage the bearing?

Again really appreciate all the advice and have enjoyed visiting this site immensely. Hope to hear a saw humming soon.

Thanks,

Peter

View Boxguy's profile

Boxguy

1538 posts in 1012 days


#7 posted 04-16-2012 05:27 AM

I think I have a saw made by the same company. Did you change the blade to a thinner one? If this saw is like mine, I installed a thinner blade and it slipped into a groove on the threaded shaft on the arbor. The results were what you described. Just as a quick test, put a thicker blade on and see what happens. The fix is a thick washer behind the blade.

Second idea. Have you checked the set screws on the pulleys? They need to be seated on the flat part of the motor shaft and the arbor shaft. If they are tight, but lined up with the round part of the shaft and not the flat part, they will spin when there is start up pressure. If there is a rounded or square key, it too needs to be lined up and in far enough to join the pulley to the shaft.

The bearing sounds like a likely culprit with your spin test.

-- Big Al in IN

View Tomj's profile

Tomj

204 posts in 1126 days


#8 posted 04-16-2012 06:01 AM

I’m not sure if this will help but when I bought my dust collector and first turned it on I would hear a screeching sound on start up and then it would lower. I wasn’t sure what it was, I asked on here and some people said bad bearings, impeller rubbing etc. What it turned out to be was the fan at the back of the motor for cooling was rubbing up against a dent in the cage surrounding it. I wouldn’t hear it after start up because the motor would be running at full speed just barely touching this small dent and sort of pushing the dent in the cage up. I just took the cage off and pushed the dent out (problem fixed). Good luck.

View Tomj's profile

Tomj

204 posts in 1126 days


#9 posted 04-16-2012 06:04 AM

Also I’m curious about this as I might be buying this table saw soon so I would like to know of any defects such as your problem or the blade going out of alignment at different heights. Again good luck.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase