Trunnion pushing table saw top upward.

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by Zetti1102 posted 09-08-2015 05:39 PM 738 views 0 times favorited 3 replies Add to Favorites Watch
View Zetti1102's profile


2 posts in 1194 days

09-08-2015 05:39 PM

Hey guys, I am new to the site but have been creeping around for awhile. This is my first post here so hopefully someone can give me a few tips or ideas.
I am having a little bit of a problem with my new Ridgid R4512 table saw (has the revised trunnion).... I have recently setup the saw and everything is working fine but one thing that I have noticed was the table top was being pushed upward when I had the blade at 90 & 45. Slight hump on the left side of the blade where the trunnion is mounted that is screwing up my cuts. On top of the saw there are 2 adjustment screws, if I back those screws off the top goes back down flat but then my angle guage on the front of the saw seems to be off. I slightly tighten the screws again to adjust the angle and then the saw top bows upward again. This only happens when I try to get the blade at a perfect 90 and 45. The tops bows out far enough as to where it is making the right side miter slot just below a 1/16”. And the stock is teetering like a seesaw.

Is there anyway to fix this problem? If I were to take the screws out completely would it affect the performance of the saw? I’ve been thinking of getting a digital angle finder instead of using the angle guage on the front if I had to remove the screws.Ideas?


3 replies so far

View 01ntrain's profile


259 posts in 1272 days

#1 posted 09-08-2015 07:49 PM

While I don’t have any answers for you, I think in your case you may want to consider bringing Ridgid in on this.

Wow, that is one problem-plagued saw! With your new problem and knowledge of the earlier trunnion issues, I will be steering VERY clear of that saw.

View MrUnix's profile


7050 posts in 2400 days

#2 posted 09-08-2015 07:59 PM

If you are basing the blade angle just by using the ‘pointer’, don’t… it may or may not be accurate.
Get yourself a cheap set of drafting triangles for a couple bucks at an office supply store. Use the 45-45-90 square to set the blade at 45 degrees at the blade. Once you have verified that the blade is really at 45 degrees, set the stop bolt accordingly and adjust the pointer to match if needed. It is very possible that you are going past 45 and that could be causing the problem you describe.


PS: Have you done any other alignment to the saw? Verified the table is parallel to the blade (at both 90 and 45 degrees)?

-- Brad in FL - In Dog I trust... everything else is questionable

View Zetti1102's profile


2 posts in 1194 days

#3 posted 09-08-2015 10:15 PM

Brad, I adjusted everything that needed to be set.This “hump” only occurs on the left side of the blade when locked into a 45 or 90. when I checked the blade angle, I only check from the right side of the blade since I was only going to be cutting from that side at that time, and everything was fine. I at the time was only cutting some longer boards for some shelving so accuracy wasn’t a big issue. Last night I was cutting some smaller stock for some jigs I wanted to make and while I was using my newly acquired Incra V120, this is when I noticed it was off.

I was tinkering around today with the saw, loosened the trunnion bolts and retightened them making sure everything was still accurate and it seemed to help alot. the hump went down drastically but it is still there to a minimum degree. I don’t have a ruler that measures less than a 16th or any feeler gauges but I can see that it is still slightly up a tad if I hold a straight edge at the left edge of the cast top (not the wings) across to the right side of the table. The straight edge does teeter VERY SLIGHTLY.

Now like I stated in my original statement, If I back off the 2 adjustment screws for the 45 and 90 the top goes flat no issues with a bow or hump. Are these 2 screws a must have or can I live without them? If I don’t need them I can always use the digital angle finder such as a wixey or maybe another brand thats magnetic and will stick to the bade?

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