Rupes 15/21 v. PC7424XP et al question...

basswood

basswood

Atlanta
Please help this deer looking into the headlights of a Mack.

I've researched the threads and cannot find an answer.

I have the XP and am considering the Rupes 15. What, other than the throw, is the advantage of the Rupes or a Flex over a DA, especially at that price?

I am currently an enthusiast on my own cars but since I am retiring soon, am considering detailing as a profession. At this point I don't even know what I don't know. California, Ohio or Florida are my first choices for basic training.

Thanks,
Tom
 
basswood said:
Please help this deer looking into the headlights of a Mack.

I've researched the threads and cannot find an answer.

I have the XP and am considering the Rupes 15. What, other than the throw, is the advantage of the Rupes or a Flex over a DA, especially at that price?

Thanks,
Tom
Click to expand...

Faster corrections, easier use
 
If you are going to detail as a profession, get the Rupes 21 with the 5" backing plate and modified washer. Talk to Kevin Brown @ Buff Daddy.
 
I understand the difference in how much area is covered.

A 5" backing plate should give me a 5 and a half inch pad. I have that with my XP.

What does the Rupes 15 or 21 do better than the XP?



Regards,
Tom
 
basswood said:
I understand the difference in how much area is covered.

A 5" backing plate should give me a 5 and a half inch pad. I have that with my XP.

What does the Rupes 15 or 21 do better than the XP?



Regards,
Tom
Click to expand...

They both have a longer throw than the XP and if modified as noted above, they will have more rotation, which is how correction happens quicker and better.

Of the 2 Rupes' machines, the Rupes 21 has the longest throw, and is a bigger footprint, but can correct faster than the 15. This may or may not be an issue for you and your current and future needs..

Good luck with your research !
Dan F
 
basswood said:
I understand the difference in how much area is covered.

A 5" backing plate should give me a 5 and a half inch pad. I have that with my XP.

What does the Rupes 15 or 21 do better than the XP?



Regards,
Tom
Click to expand...
Faster correction, no need for downward pressure on the head on the machine, vibration is little to none , and ease of use.
 
Stokdgs said:
They both have a longer throw than the XP and if modified as noted above, they will have more rotation, which is how correction happens quicker and better.

Of the 2 Rupes' machines, the Rupes 21 has the longest throw, and is a bigger footprint, but can correct faster than the 15. This may or may not be an issue for you and your current and future needs..

Good luck with your research !
Dan F
Click to expand...

Other than the throw, why is it better?
 
Evan.J said:
The larger throw is what makes it better than an XP.

Im not sure what else your looking for?
Click to expand...


Correction is correction, i believe.
Does the Rupes 15/21 correct differently, better, worse , faster than the Porter Cable 7424XP?

Thanks
To,
 
basswood said:
Correction is correction, i believe.
Does the Rupes 15/21 correct differently, better, worse , faster than the Porter Cable 7424XP?

Thanks
To,
Click to expand...

Here is an article by Kevin Brown. He has really done his homework on this machine and break down ever aspects of the Rupes. If you can find you're answer in this article then I don't know what to tell you lol

http://www.autopia.org/forum/machin...andom-orbital-polisher-features-benefits.html

Very very indepth read I hope this helps you
 
basswood said:
Other than the throw, why is it better?
Click to expand...

The newer machine/s starting with the Flex 3401VRG and now the newest Rupes machines have more pad rotation and has been already said above, pad rotation is what you want, to break down the compound and make it correct the paint.

This type of paint correction where the pad is spinning, will always be more complete and yield a better finish than a machine where the pad is not spinning or spinning very little..

The Porter Cable is not designed to be a paint correction machine in the first place. It has always been a sanding device that people decided to use on automotive paint to correct it and not introduce swirls, that can be made by using a Rotary machine improperly.


Now, does this help ?
Dan F
 
basswood said:
Correction is correction, i believe.
Does the Rupes 15/21 correct differently, better, worse , faster than the Porter Cable 7424XP?

Thanks
To,
Click to expand...

No, correction is not just correction - there are an infinite number of levels of correction.

The machine that has the longest throw and best rotation will always have the potential to correct better, all things being equal, than a machine that has a smaller throw and less pad rotation..

The Rupes machines, used properly with pads and compounds, etc., correctly matched to the type of paint and condition of said paint, will correct better than the PCXP..

Does this help ?
Dan F
 
Yes, the biggest single difference between the Rupes and the PC is that the Rupes' Bigfoot Polishers (15 & 21) BOTH have a much larger stroke than the PC.

Imagine we were comparing a Mazda 3 (a very nice car) to a brand new 630 horsepower Mercedes Benz AMG. To many people the only difference is the "engine". However if you need to get from point A to point B quickly, the AMG is the choice.

Compared to the PC, the Rupes will correct faster, vibrate less, and require less pressure. Each of these factors are HUGE in terms of machine performance.

Furthermore, Rupes has developed an entire polishing system which includes pads and polishes specifically designed for the large stroke of the Big Foot Polishers. There system makes it incredibly easy for anybody to achieve professional results with very little experience.
 
What about a machine like the Cyclo? I have been looking at these and they have a 3/4" stroke if I read that right. And if my math is right 21mm equals .826" so that's only .076" difference - or a little less than 2mm. And you have 2 heads working a 4" pad so that would be 8" of pad moving about the same distance. Just wondering..
 
Thanks to all of you who took the time to clarify the differences to this nooo-bie.

It does make sense now and it appears that the price is justified.

Best,
Tom
 
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