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wingless' Ridgid R4511 Granite Table Saw - Bevel Mechanism Gear Skipping Repair

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Blog entry by wingless posted 02-09-2019 01:05 AM 2209 reads 0 times favorited 8 comments Add to Favorites Watch

There are several Internet topics about Ridgid R4511 granite table saw owners w/ tilt bevel mechanism rack and pinion gear skipping problems, but I have not located any with the solution to that problem.

That problem existed on my terrific new-to-me R4511 table saw.

There was no solution provided when I called Ridgid technical support. (When I determined the solution, I called them back so they would also have that information.)

On my saw, when attempting to set a 45° bevel, just prior to reaching that angle the pinion gear would skip one tooth on the rack gear, with a loud clunk.

The entire saw was cleaned and all the moving contact surfaces were lubricated, but all that had zero effect on the problem.

The tool has an eccentric sleeve, P/N 089037005154, item 73 on Parts List Figure B. That sleeve has an exposed 14mm hex head, like a nut, shown in the image adjacent to the block.

The rotation of that sleeve brings the worm gear shaft closer or further to the pinion gear. (Note that I supported the heavy motor mass during this adjustment so the motor wouldn’t / couldn’t suddenly swing if the gears disengaged.) When I rotated the sleeve to bring the pinion gear closer to the rack gear this restored normal full-swing operation of the tilt mechanism.



8 comments so far

View wingless's profile

wingless

95 posts in 1030 days


#1 posted 02-09-2019 04:22 AM

This image shows the eccentric, where the eccentric nut is coaxial w/ the shaft, but the gear and collar are offset.

This shows how rotating the nut/eccentric will change the spacing between the pinion gear and the rack gear.

On mine, it took a breaker bar and a 14mm crowfoot wrench to break the eccentric free. Once free, a regular combination wrench permitted normal rotation for the proper setting.

!!! Please remember to block the motor during this adjustment so it doesn’t fall suddenly if the gears disengage !!!

View stefang's profile

stefang

17040 posts in 4622 days


#2 posted 02-10-2019 12:07 AM

Do technical support people just give up if they can’t answer technical questions right off the bat? I would have thought that they would have checked back down the line as far as necessary and come back to you with an answer. Maybe they can’t do that nowadays because most machine tools are produced abroad these days. Anyway it was lucky that you were smart enough to solve a problem that the ‘experts’ couldn’t.

-- Mike, an American living in Norway.

View wingless's profile

wingless

95 posts in 1030 days


#3 posted 02-10-2019 01:42 AM

There is zero fault assigned by me to Technical Support. The agent I spoke with investigated the problem, then discussed the issue w/ others prior to not being able to provide the solution. We were on the phone for over a half hour in an attempt to resolve the issue.

My assignment of blame is instead directed at me. I never tilted the blade when I investigated the saw for purchase, 100% my fault.

When I inquired of the seller about the problem (after the sale, but prior to understanding / resolving the problem), I was informed that 45° tilt worked fine for him, it must have cropped up during the move from his home to mine.

My BS meter is now pegged on his response because it took massive force w/ my largest breaker bar before that 9-year-old eccentric moved. Now it rotates fine.

Also in-defense of Tech Support, I have the tool in my shop, they don’t. At the time of our conversation I had dozens of images of those parts that have since received detailed examination, before I spotted the offset that is identified with the arrows. Tech Support didn’t have those images.

All is good. Now I know, Tech Support knows and the Internet knows.

There are thousands of these Ridgid R4511 saws. The mechanism is 100% different on their next saw, the R4512, so the population of owners that will need this information is limited.

In my case, I want the saw to work fine during my ownership. My last saw was in tip top condition for my 25 years of ownership, until the motor suddenly gave up the ghost (not the brushes, wiring or switch), leading me to end up with this as a replacement.

Most of my tools are many decades old and still look / perform like new. I expect the same from this saw.

View stefang's profile

stefang

17040 posts in 4622 days


#4 posted 02-10-2019 07:22 PM

I didn’t realize this was a used saw so I see your point.

-- Mike, an American living in Norway.

View Ouka's profile

Ouka

1 post in 616 days


#5 posted 03-29-2020 03:25 AM

Hello, thanks for the guide, this is getting me closer to solving what is wrong with my saw.

Can I ask for clarification on the issue you ran in to? (Pardon me if I get wrong terminology, this is sort of a new realm for me).

Was your eccentric seized in the arbor hole in the front bracket (54), to the tilt shaft rod (72) or hex head seized against the sleeve (74)?

When I turn my tilt wheel the rod starts to deflect past 30 degrees or so. When the threads disengage the whole thing slips and rapidly drops 10-15 degrees.

Im trying to figure out what, if anything, in the assemblage is seized, and where to apply pressure if it is.

View wingless's profile

wingless

95 posts in 1030 days


#6 posted 03-29-2020 12:32 PM

Welcome to the forum.

In my case the eccentric sleeve did not want to rotate until after I broke it free, using a breaker bar, then it rotated fine.

In my case the rack and pinion gears would skip, prior to reaching the 45° setting, prior to adjusting the gear engagement setting, now it works fine.

The eccentric sleeve was adjusted to increase the gear engagement, reducing the gap between the rack and pinion gears.

Remember to support the motor mass, so it doesn’t suddenly crash if the gears disengage during adjustment.

View NoTalentRookie's profile

NoTalentRookie

21 posts in 5446 days


#7 posted 06-20-2021 05:32 PM

I haven’t signed on in years…..but do lurk fairly often.

I had to sign on, just to say Thank You, for posting this thread.

My issue was a little different, in that my tilt mechanism locked up just like there was something jammed in the teeth. Of course, it was in the tilted position. You’re post got me close enough, to make some adjustments and at least get it back to 90 degrees. I still have to fool with it some more, it’s still very stiff. But, it’s a working table saw again thanks to you, and you taking the time to post these pics.

Love my granite top, and hope to use it till I kick the bucket!

View wingless's profile

wingless

95 posts in 1030 days


#8 posted 06-21-2021 08:19 PM



I had to sign on, just to say Thank You, for posting this thread.
- NoTalentRookie

Glad to help.


My issue was a little different, in that my tilt mechanism locked up just like there was something jammed in the teeth. Of course, it was in the tilted position. You re post got me close enough, to make some adjustments and at least get it back to 90 degrees. I still have to fool with it some more, it s still very stiff. But, it s a working table saw again thanks to you, and you taking the time to post these pics.
- NoTalentRookie

YW

You may already be aware, the cast iron blade assembly has end posts that permit rocking / tilting in vee grooves in the cast iron trunions. A broken trunion is shown in this image.


Discovered the problem.

- OfficerDoofy

A second boss is captured during the curved movement in that arc channel.


Love my granite top, and hope to use it till I kick the bucket!
- NoTalentRookie

Me too. Mine provides solid dependable performance.

This topic shows the details on my R4511.

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