BOSS 21 or Rupes 21 MkII

dlc95 said:
I like supporting the innovators whenever possible. Real tool manufacturers go a long way for me. Probably from having grown up in an automotive family.

Rupes, Flex, and Black & Decker (Porter Cable) is where I like to spend my money. Just a personal preference thing. I respect the cost involved with conceptual, engineering, prototypes, final models, consumables, etc, etc... All in an effort to create professional grade, industrial quality tools.
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years ago when i talked to someone at megs about their G100 (rebadged 7424 which i own) they said they would get tons of those back on warranty issues. while porter cable came out with the traditional PC-style DA first, compared to the other options that are out there are much better choices, they need to get with the times and pay attention (evolve) to what's going on...
 
VISITOR said:
years ago when i talked to someone at megs about their G100 (rebadged 7424 which i own) they said they would get tons of those back on warranty issues. while porter cable came out with the traditional PC-style DA first, compared to the other options that are out there are much better choices, they need to get with the times and pay attention (evolve) to what's going on...
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Kevin Brown, Joe Fernandez, and a couple other detailers were musing with me on FB about the durability of those machines. The common comment was that they were "bulletproof". Kevin still really likes the g100, and refers to it as "one of his favorites". At least that what's mentioned on the Larry podcasts.

As for me, a majority of my work has been done with the either variety of the PC.

I keep hearing the "much better choices" phrase, but I have no complaints. The Rupes tools I have probably fit that description, but if I was on a budget, and wanted a cheap simple tool, I'd hoped on Craigslist, fork over $45.00, and get an old 7424. I saw an old crusty one at a local pawn shop for $25.00!
 
If you've already made your mind up about putting a 5" backing plate on whichever machine you get, then just get yourself a 15mm. polisher.


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Eldorado2k said:
If you've already made your mind up about putting a 5" backing plate on whichever machine you get, then just get yourself a 15mm. polisher.


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Agreed. 21mm with 5in BP becomes a pad eater, lot of heat build up. I used to do that for a while, never went back. I'm thinking about buying a 15mm for using 6in pads.
 
Rupes is or will be assembled in the USA.....for a few bucks more ....
 
RPM_BR said:
Agreed. 21mm with 5in BP becomes a pad eater, lot of heat build up. I used to do that for a while, never went back. I'm thinking about buying a 15mm for using 6in pads.
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I haven't experienced that running my 5" BP on my G21. I've never put the 6" back on. I like the longer 21mm throw with the 5" bp. Haven't had any issues with any of the varieties of pads I've run on it.
 
custmsprty said:
I haven't experienced that running my 5" BP on my G21. I've never put the 6" back on. I like the longer 21mm throw with the 5" bp. Haven't had any issues with any of the varieties of pads I've run on it.
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I had problems with BS cutting and finishing MF pads, and velcro issues, wearing out a lot faster.
Indeed, it cuts a lot more. But when I need more cut than 21mm on 7in pads, I grab a rotary, it is just my style.
It is very common the chinese 21mm knock offs coming with 5in BP.
But, imho, I would stick with what Rupes engineers designed the machine for, 21mm for 6in BP and 15mm for 5in BP. Best regards.
 
RPM_BR
Off topic, is that a Jindo in your avatar?
 
VISITOR said:
RPM_BR
Off topic, is that a Jindo in your avatar?
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No Sir, my female Akita, almost nine yrs. old now, called Milky. It is kinda rare, since she's all white.
I'm a big fan of Akitas, silent, loyal, trusty dogs, and good with kids.
 
VISITOR said:
years ago when i talked to someone at megs about their G100 (rebadged 7424 which i own) they said they would get tons of those back on warranty issues. while porter cable came out with the traditional PC-style DA first, compared to the other options that are out there are much better choices, they need to get with the times and pay attention (evolve) to what's going on...
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Dunno. I think the 7424 was a very reliable machine. In fact - I bought mine in around 2005 or 2006 (before XP); - and I just used it last night to polish some headlights.

Still works as good as new.
 
RPM_BR said:
No Sir, my female Akita, almost nine yrs. old now, called Milky. It is kinda rare, since she's all white.
I'm a big fan of Akitas, silent, loyal, trusty dogs, and good with kids.
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the akita (japan) and jindo (korea) seem to be similiar in some ways, for one very loyal to it's owner no doubt about it. here's an amazing/heartwarming story on the jindo (click twice). hope you have many more years with her, she's beautiful!

 
fightnews said:
u get cars done a lot faster with six inch pads
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7" pads*

RPM_BR said:
Indeed, it cuts a lot more. But when I need more cut than 21mm on 7in pads, I grab a rotary

But, imho, I would stick with what Rupes engineers designed the machine for, 21mm for 6in BP and 15mm for 5in BP. Best regards.
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Rupes MKll has its own set of rules, but as far as the Griots Boss 21, I believe I've heard official word stating that the cut is the same [all things being equal, i.e. type of pads, compound] whether you use the 5" Boss backing plate or the 6". The only way to gain extra advantage is by using the provided washer mod.

BTW I used to have the same exact mentality as OP when I 1st purchased my G21, I bought a 5" backing plate on day 1, but the more I got a chance to use the polisher as originally intended [with the 6" backing plate and 6.5-7" pads] the more I began to feel like I was finally seeing the polishers true potential in everyway.


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Eldorado2k said:
7" pads*



Rupes MKll has its own set of rules, but as far as the Griots Boss 21, I believe I've heard official word stating that the cut is the same [all things being equal, i.e. type of pads, compound] whether you use the 5" Boss backing plate or the 6". The only way to gain extra advantage is by using the provided washer mod.

BTW I used to have the same exact mentality as OP when I 1st purchased my G21, I bought a 5" backing plate on day 1, but the more I got a chance to use the polisher as originally intended [with the 6" backing plate and 6.5-7" pads] the more I began to feel like I was finally seeing the polishers true potential in everyway.


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Actually Jeff Brown states on Boss overview video on youtube that if you want to be even more agressive with 21, then use 5 pads:

https://youtu.be/FtpgZV9vL1A?t=592
 
WRAPT C5Z06 said:
The BOSS polishers use better bearings than the MK II Rupes.
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Interesting discussion guys. Actually, the Rupes and THE BOSS both employ NSK Bearings. The quality should be equivalent to one another.

As for Pad size, something to ponder....

Buffing pads impact performance like a tire on a race car
5” system vs. 6" system

From a high level...

Pad size will have an affect on the following:
  • Energy Transfer - the efficiency of the transfer of orbital>>rotational energy from motor>>counterbalance>>backing plate>>Paint (This is more impacted by pad thickness and firmness)
  • Surface area a 6.5" pad is 40% difference larger than a 5.5" pad. Benefits to 6.5" pad- less passes to cover your work zone. However, technically the passes aren't as efficient as a 5.5" pad (higher rotation)
  • Surface Tension smaller the pad, the lower the surface tension, the higher the pad rotation (all things being equal- speed, downward pressure, pad selection) The reduction in tension or surface resistance will allow the pad to spin more freely, increasing speed correction
  • Pounds per square inch (Tool weight and User downward pressure) a 6.5" pads distribute the pressure more evenly across the paint surface. This in some ways can reduce correction due.

Then there is the contradiction- due to rotation, the larger pad will have increased cutting ability on the outside diameter. It'd be like comparing using a 3" Wool pad on a rotary (Not much cut) vs a 10" Wool pad (cuts like gangbusters)​


Benefits to smaller pads-

  • Maneuverability & Control - smaller the pad, the more precise you’ll be
  • Speed of correction can be increased depending on your tool of choice and technique


At the end of the day, we're all blessed with so many options. Use what works for you.
I personally do 65% of my paint correction with a 5" Long-Throw Orbital (THE BOSS), 15% Rotary and 20% with other.

As for wax and sealant application, I'd never recommend using a long-throw orbital for application. You'll always get a more even application of the film forming polymers via a 8mm orbital. Ever notice circular tracking of your favorite sealant following wipe off. The long-throw hyper cures the polymer creating circular highs and lows.


Have fun in your garage!

Jeff
 
@Brownie. Thanks for the detailed information.


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Brownie said:
At the end of the day, we're all blessed with so many options. Use what works for you.
I personally do 65% of my paint correction with a 5" Long-Throw Orbital (THE BOSS), 15% Rotary and 20% with other.
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Dear Jeff
The 65% you mentioned, you use the G21 or the G15 with 5BP?
By the way, I'm drooling over the G15.
Best regards, and thanks in advance
 
The G15 is my first long throw polisher and I love it!
Reason why I chose griots over the rupes is ...
1.price
2.warranty
3. Customer support - Jeff goes above and beyond to help and answer all your questions.
4. Comfort. Feels great in my hands! The trigger,lock button,the clicking in the speed control button is soooo good!8

If I was doing this for a living I would get the G21 as qell
 
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