R4511 question

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Forum topic by , posted 06-07-2010 04:46 AM 1480 views 0 times favorited 8 replies Add to Favorites Watch
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2387 posts in 3572 days

06-07-2010 04:46 AM

Does anyone that has the R4511 find that it struggles while cutting a hard wood. Today I used the 4511 extensively while cutting hard oak. I still have my 3660 set up in our garage shop and I have used the 3660 (which has the same motor) a ton while cutting many hardwoods with no problems at all. But today my 4511 showed signs of struggle cutting through 13/16” oak.

I will say there are two possible issues that come into play. My 4511 currently has a 60 tooth blade on it, which was the only blade I had in the shop so if I had a 24 tooth blade I certainly would have used that. But my 3660 has cut through 8/4 hard maple with a 60 tooth blade with no problems at all.

The other issue I feel is likely is that since setting up the 4511 I discovered the belt severely creased and because of this the belt runs only on 2/3 of the pully with 1/3 of the belt hanging off the pully. I could not adjust the pulleys in any direction to improve this issue so I am confident I need a new belt. So hopefully when I get a new belt I should see a significant upgrade in the power of the saw. It is hard for me to believe that the 4511 is not as strong as the 3660 since they both have the same motor. I even resaw hardwood with my 3660 with very little difficulty when proper technique and safety practices are applied.

Any advice is welcome. Thanks, Jerry

-- .

8 replies so far

View MarkwithaK's profile


370 posts in 3203 days

#1 posted 06-07-2010 06:25 AM

Nothing helpful to add really….Mine works just fine. It did have a tendency to burn and bog down in some hard maple once but that was due to the stock blade. After switching to a Frued it’s no longer an issue.

-- If at first you don't succeed then maybe skydiving isn't for you.

View knotscott's profile


8056 posts in 3401 days

#2 posted 06-07-2010 01:00 PM

The belt could certainly be a contributor. With proper blade selection, I was able to cut anything to full blade height with my Craftsman 22124, which has a similar drive system. It should cut 13/16” oak pretty easily even with a decent 60T blade, assuming the saw has ample power from the circuit.

Setup and blade selection are also major contributors. Not all 60T blades are the same….number of teeth is certainly big a factor, but so is the kerf width width, cleanliness, sharpness, flatness, hook angle of the teeth, and overall tooth geometry, etc.

The wood itself is also variable…is flat, straight, & dry?

Check the blade to fence alignment, pulley alignment, blade condition, flatness of the fence, etc.

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

View Cato's profile


701 posts in 3337 days

#3 posted 06-07-2010 01:15 PM

I use my 4511 only for ripping and run Freud glue line 24 tooth full and thin kerf. I was getting some burn on 4/4 hard wood when I was ripping lumber that had not been jointed.

Now that I go through the jointer first I only have to watch my feed rate on harder and thicker stock. Fence alignment is very important.

A new belt will help a lot for your saw. My stock one was not that bad, but the new belt I put on made the saw run a lot smoother.

View rance's profile


4258 posts in 3185 days

#4 posted 06-07-2010 02:04 PM

Given your statement regarding the belt, it certainly sounds to me that you have some alignment or adjustment problems you should correct.

Is the blade on your 3660 sharper than the one on the 4511? Eliminate the unknowns, try swapping blades between the two saws and see what changes or are the results the same.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View ,'s profile


2387 posts in 3572 days

#5 posted 06-07-2010 02:58 PM

Yeah, I think there are variables that are affecting the 4511 negatively. I really think the belt I have is bad and with it running 1/3 off of the pulley the pulley is bound to be slipping some. Plus the 60 tooth blade I am using is made by Dewalt and in the past I can remember not being as happy with the Dewalt blades, feeling they are a fair blade but not great. My 3660 was cutting with the 60 tooth Avanti blade which I think the Avanti blade is a much better blade then the Dewalt. I will get another belt and another blade and go from there. I am sure the problem will be solved at that ponit. I do feel the 4511 is a much better saw then the 3660. The 4511 has the cabinet mounted trunnions and has better dust collection and I do not have to deal with the motor sticking out of the back of the saw.



-- .

View knotscott's profile


8056 posts in 3401 days

#6 posted 06-07-2010 03:31 PM

Yeah…the belt situation can’t be helping anything, and would be the first thing I’d try to remedy.

It’s probably not a blade ”brand” issue either…more likely a blade selection mismatch that happens to be a DW blade. The DeWalt construction series 20 blades aren’t suitable for fine woodworking IMHO. If that’s what you’ve got, it’s perfect for cutting the neighbor’s wood! ;) In defense of the better DeWalt blades, their Precision Trim “PT” series, and former series 40 are very good, and the series 60 blades were excellent (ie: DW7657, DW7640, etc). I wouldn’t hesitate to try a suitable DW blade if a good deal presents itself.

The 60T Freud Avanti blade is similar to the excellent Freud Industrial LU88, which was a favorite of mine on my hybrid saw….it’s got a nice steep 15° hook angle, which helps it rip surprisingly well for a 60T blade.

Good luck!

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

View a1Jim's profile


117115 posts in 3602 days

#7 posted 06-07-2010 05:14 PM

It could be that blade is not sharp.

-- wood crafting & woodworking classes

View KTMM (Krunkthemadman)'s profile

KTMM (Krunkthemadman)

1055 posts in 3219 days

#8 posted 07-02-2010 09:15 PM

REPLACE THAT BELT. Mine wouldn’t cut pine with a 1/4” dado blade until I replaced the belt with an identical one from a local industrial belt dealer. I just took the old one in and the guy had the replacement in a few seconds. The original belt was very warped. Even though it rode completely on the pulleys, it didn’t grip very well.

-- Practice does not make perfect. Only perfect practice makes perfect. Vince Lombardi

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