Problems with my R4512, adding a link belt?

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Forum topic by indychip posted 05-29-2013 12:07 PM 1812 views 0 times favorited 6 replies Add to Favorites Watch
View indychip's profile


81 posts in 2297 days

05-29-2013 12:07 PM

So I went out to my garage yesterday to make some saw dust. Turned on my R4512 to rip some 4/4 walnut. As soon as the wood hit the blade, the saw bogged down and stopped. I have a brand new Forrest blade, so I know the blade is not the issue. Opened up the back panel and noticed that the belt is extremely loose. I am pretty sure that is the problem. Since I have to go in a tighten the belt anyway, I was thinking about just adding a link belt. Is there any modifications that need to be done when adding a link belt, or can I just swap out the belts? If the belt is not the issue, what else can I look at as a possible cause to my issue? Thanks

6 replies so far

View Tedstor's profile


1678 posts in 2808 days

#1 posted 05-29-2013 12:21 PM

No modification is necessary. Just buy the belt, make it the current length, and slap it on.
The motor on most contractor saws are mounted on a hinge. Moving the motor forward or back on this hinge is what determines the belt’s tension. More than likely, the bolt that locks the motor in position has simply worked its way loose. It happens. Just tension the belt, tighten the bolt, and thats it. WHile you’re at it, make sure the set screws on the motor and arbor pulleys is securely fastened. A loose pulley can certainly cause tension issues too.

I doubt the belt, by itself, is the issue. And even if it were, a plain v-belt is the cheapest/easiest remedy. I personally don’t feel a link belt is a magic bullet. They don’t even fit correcly into most v-shaped pulley grooves. BUT, there is a large and passionate population of link belt lovers that will disagree. And they’ll have stories of improved power, straighter cuts, and world peace to prove it. :)

View PaulHWood's profile


442 posts in 2428 days

#2 posted 05-29-2013 01:16 PM

Mine was a broken set screw where it connects to the motor, so it was actually sliding in and out making the belt loose.

Lifetime warranty said I had to bring the whole thing in which I did (big pain). They replaced the motor also.

-- -Paul, South Carolina Structural Engineer by trade, Crappy Woodworker by choice

View PurpLev's profile


8541 posts in 3824 days

#3 posted 05-29-2013 01:25 PM

if this is one of the newer grooved belts (has 6 or so grooves) you are better off getting a proper replacement belt. a loose belt suggests something else is at play – not necessarily the belt itself.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View crank49's profile


4032 posts in 3146 days

#4 posted 05-29-2013 03:03 PM

That saw has a small thin flat grooved belt that I do not believe can be replaced with a link belt.

Be sure there are no cracked or broken parts in the motor mount assembly. If nothings broken, the bolts must have loosened up a bit. Pull the motor down to tighten the belt and re-tighten the bolts in the motor mount.

View toolie's profile


2147 posts in 2804 days

#5 posted 05-29-2013 09:16 PM

Lifetime warranty said I had to bring the whole thing in

not knowing how old your saw is, it may still be covered by the 3 year new tool warranty. ridgid hand held and stationary power tools do not carry a lifetime warranty. new tools are eligible for registration by their original owner with ridgid’s lifetime service agreement (LSA). it’s all here:

just mentioning it in the event your 4512 hasn’t yet been registered with the LSA.

-- there's a solution to every just have to be willing to find it.

View knotscott's profile


8140 posts in 3551 days

#6 posted 05-29-2013 09:40 PM

You’d need to replace the pulleys to add a link belt to an R4512, and you’d likely not being gaining much.

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

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