Just so's the whole truth about the 3650 arbor length is out here, I just stacked the 8" Freud Super Dado set (29/32" without shims) on the new replacement arbor. The OEM nut goes on fine for about 3 and a half turns - or roughly 75% of all the way through the nut. Which might be safe enough but you're on your own going beyond 13/16 since that is the max stated in the 3650 manual. By rights we ought to be able to get the washer on there too and still have the nut fully threaded.
The danged Freud weighs approx. 14 gazillion pounds so it would be easier on the motor startup if that washer could be on there to spread the initial torque a little.
I still think somebody in Ridgid Emerson purchasing messed up or forgave a miscommunication in specs or a bad machining run and probably got a break on the cost of the originally supplied arbors.
It just needs to be said, that if you plan to buy a dado set based on maximun width of cut - for say major volume wide-rabbetting chores, you're not going to "legally" use or have supported, the use of chippers beyond 13/16". You'll always have one chipper in the box and would always build your way back up to Ridgid's documented max 13/16" with shims.
I'm probably the worst for standing on principle about stuff (aka, anal), but this goes out to anyone who similarly wants to be uncompromising about quality and value.
Some smoothie screwed up somewhere in the process of spec-ing this part. I just don't see what it could have hurt to cut these arbors another 3/16" longer.
I mean they got this close to a perfect value and then didn't check to see what was out on the dado market? No. We do not accept Master Mechanic quality.
Couple this issue with the arbor groove issue and it just seems to me this part had to have been farmed out to an outfit that gave them a bottom dollar bid worse than bargain basement. And now they move to correct the groove problem and don't tackle the arbor's length issue at the same time??
Bottom line, according to the 3650 manual, which covers their tails legally, you're arbor is 3/32" too short to use all the chippers on your best quality 29/32" max cut dado set.
Which is about the only undeniably amateurish thing about the 3650.
So close (to "professional"), and yet so far away....
As someone else said in another thread, this is what happens when bean counters drive the better intented product line.
You can use either of those Freud sets on the 3650 just fine.
You just can't fit all the chipppers of a Freud set on the 3650 arbor at the same time. You'll always have at least one chpper in the box.
Misleading to infer that the Freuds would not be able to reach the 3650's max limit of 13/16".
Could be that some parties on this site do not want you to get on board with pushing for longer arbors for the 3650.
The arbor length was definitely an embarassing maunfacturing oversight on this otherwise great saw.
The Freuds are peerless. Don't let the 3650 limitation steer you in another direction. Instead stay tuned and support those of us who are trying to get the companies to issue professional length replacement arbors.
It should also be noted for the benefit of newbies that the new arbor replacements that are currently being talked about, do not correct the arbor length issue.
The companies (Ridgid and parents) corrected a machining error which caused a groove near the shoulder of the thread about 1/8" out from the flange.
The current replacement arbors do not correct the shortness of the arbor which prohibits your being able to safely use all of the chippers of a professional grade dado set.
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