DA questions , need advice, step inside

S

Senile Old Fart

Hi Guys, Mrs. Santa is going to buy me a sander or two for Christmas.
I am requesting Dynabrade brand sander(s).


My questions are : 5" or 6" inch. I have only used 6"in the past.
orbit size 3/8, 3/16, or 3/32 ?
what is the difference in the Dynabrade premium vs Spirit line?
would a Dynalocke be worth purchasing?

I want to strip paint to bare metal, sand primers, fillers, and get ready for color.

I would think the 5" size would use about 17% less air as the diameter being smaller would put less load on the sander and the trigger not need to be wide open?

Only thing I don't want to do is color sand with them. -Save that until my birthday and maybe she will get me the 10353 to finish out the set :)

I am looking at the 21010 - 5"x 3/8 and the 17754 5" x3/16.

Opinions and suggestions greatly appreciated, I prolly got my thinking all wrong, typical for me .
 
It depends. Are you sanding POR-15 or Zero Rust because it makes a big difference. Anyway, you should buy all your tools at a single source -- best place is Harbor Freight. I'm the last one to give advice because Earl's cousin-in-law taught me everything I know.

I do have two Dynabrade DAs. I chose the 6" model because I invested in a bunch of 6-inch hookit disks for the old 7-pound Harbor Freight DA I bought before enrolling at SPI University. As far as the amount of air used, it's the same regardless of the pad size. I've highlighted the differences between my two. The Dynabrade Silver Supreme line is "For high production usage." while the Dynabrade-Spirit line is, I guess, for low production use. My Spirit model weighs three tenths of a pound less than the Silver Supreme (1.5 versus 1.8 pounds).

My first Dynabrade is a Dynorbital Silver Supreme Model 69025 3/16" orbit with a 6-inch pad.
prodimage.php

According to the Dynabrade website, this model produces .26 hp/194 W using 16 SCFM/450 LPM to maintain maximum power. It is "For high production usage... Steel cylinder and end plates increase motor efficiency." It weighs 1.8 lbs.

My second Dynabrade is a Dynorbital-Spirit Model 21062 3/32" orbit with a 6-inch pad.
prodimage.php

According to the Dynabrade website, this model produces .25 hp/186 W using 14 SCFM/396 LPM to maintain maximum power. It weighs 1.5 lbs.

I have no experience with the Dynalocke line but they give you finger-tip switching between orbital and rotary sanding with quite a bit more horsepower (Dynalocke is .45 hp versus the Dynabrade Silver Supreme .26 hp). That switchability and power costs quite a bit in weight, air consumption and price. Dynalockes weigh 2.88 lbs, almost double the weight of the ones I have, they need 23 SCFM/651LPM to produce the higher horsepower and sell north of $300.

Just using Amazon, here are some current prices (note that the Silver Supreme sale price is lower than the Spirit):

Dynabrade 69020 Dynorbital Silver Supreme Non-Vacuum Random Orbital Sander, 5-Inch 3/16" orbit - $153.72
http://www.amazon.com/Dynabrade-690...id=1387176140&sr=8-1&keywords=dynabrade+69020

Dynabrade Model 21030 5" Non-Vacuum Dynorbital-Spirit Random Orbital Sander 3/16" orbit - $159.00
http://www.amazon.com/Dynabrade-Non...id=1387176414&sr=8-1&keywords=dynabrade+21030

Dynabrade 58430 DynaLocke Non-Vacuum Dual-Action Sander, 5-Inch - $391.00
http://www.amazon.com/Dynabrade-584...UTF8&qid=1387176875&sr=8-2&keywords=dynalocke
 
I assume by the posters above and the current threads getting attention this must be tongue in cheek?
 
bomccorkle;33112 said:
I assume by the posters above and the current threads getting attention this must be tongue in cheek?
Click to expand...

I do believe that Bob tossed in a bit of humor at the start of his reply.lol.

I am serious about the sanders, both pad size and orbit size . Some say it makes very little difference, others say it is very noticeable. The big dogs on this site will have the right answers :)
 
I see. Fwiw I use a dynabrade 6 inch on just a twin piston 80 gal compressor. Dynorbital 12,000 rpm it says on the handle. I'm a noon but its served me well.
 
bomccorkle;33118 said:
I see. Fwiw I use a dynabrade 6 inch on just a twin piston 80 gal compressor. Dynorbital 12,000 rpm it says on the handle. I'm a noon but its served me well.
Click to expand...

which orbit size does it have and would you chose different if you were to replace it? thx.

btw what is a noon?
 
Sorry noob. Gotta love auto correct... I am heading to work now and I'll check see when I get off later sir. As I said it has worked well for me and I couldn't see changing it for anything else although I would like to augment it by having an 8" mudhog as well
 
When I stay up past midnight my posts kind of deteriorate (I finished that post at 2 am). I wasted a lot of time and money on "miracle" products that just don't work. I still buy some Harbor Freight tools but once I used a Dynabrade DA for a couple of hours I was converted. It weighs next to nothing and the trigger works just by using it. My hand isn't numb at the end of a sanding session and my elbow isn't on fire from pushing a heavy machine around.
 
you want 6" and a 3/32" orbit. 3/8 orbit will be more for hevy body filler removal and roughing in. i have 6 sanders and they are all 3/16. i had a 3/32 once. kept it for 2 weeks and sold it. what a waste. you dont want 5" either. 5" is extremely difficult to find in automotive grade papers. autobody is always 6". wood and marine industry is 5".
 
3/16 orbit. Its a spirit model. I bought it used about 5 years ago and like Jim said I had to buy a new weight and pad to switch it to 6 inch because none of my jobbers carry 5 inch automotive grade paper. I have a few dynabrade sanders(like a little air powered handheld belt sander) and they are all top notch as far as I'm concerned.
 
Jim C;33145 said:
you want 6" and a 3/32" orbit. 3/8 orbit will be more for hevy body filler removal and roughing in. i have 6 sanders and they are all 3/16. i had a 3/32 once. kept it for 2 weeks and sold it. what a waste. you dont want 5" either. 5" is extremely difficult to find in automotive grade papers. autobody is always 6". wood and marine industry is 5".
Click to expand...

In reference to what Jim stated, I have a customer that still uses 5" and I don't stock much because he is the only one that uses it, I sometimes call in the order and have it drop shipped to him next day, when I call to place a order and need a few grits, I may be able to get 120 grit in one brand but have to get 320 in another because they don't stock the whole line in 5" Makes me wonder if they are just getting rid of old stock because it's so hit and miss.. So with that being said I would strongly suggest going to 6"

I have been thinking about getting a nice 3/32 to try for color sanding, to see if I would have better luck with it, so I think you just saved me some money jim.. lol.

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Jim C;33145 said:
you want 6" and a 3/32" orbit. 3/8 orbit will be more for hevy body filler removal and roughing in. i have 6 sanders and they are all 3/16. i had a 3/32 once. kept it for 2 weeks and sold it. what a waste. you dont want 5" either. 5" is extremely difficult to find in automotive grade papers. autobody is always 6". wood and marine industry is 5".
Click to expand...

In reference to what Jim stated, I have a customer that still uses 5" and I don't stock much because he is the only one that uses it, I sometimes call in the order and have it drop shipped to him next day, when I call to place a order and need a few grits, I may be able to get 120 grit in one brand but have to get 320 in another because they don't stock the whole line in 5" Makes me wonder if they are just getting rid of old stock because it's so hit and miss.. So with that being said I would strongly suggest going to 6"

I have been thinking about getting a nice 3/32 to try for color sanding, to see if I would have better luck with it, so I think you just saved me some money jim.. lol.

- - - Updated - - -

Also if anybody has a need for 5" velcro I have quite the collection and don't have any customers that have a use for it. It was used at a factory that painted spoilers for mostly toyota and ford for new cars but they went out of business a few years ago.

- - - Updated - - -

Also if anybody has a need for 5" velcro I have quite the collection and don't have any customers that have a use for it. It was used at a factory that painted spoilers for mostly toyota and ford for new cars but they went out of business a few years ago.
 
Chad.S;33284 said:
In reference to what Jim stated, I have a customer that still uses 5" and I don't stock much because he is the only one that uses it, I sometimes call in the order and have it drop shipped to him next day, when I call to place a order and need a few grits, I may be able to get 120 grit in one brand but have to get 320 in another because they don't stock the whole line in 5" Makes me wonder if they are just getting rid of old stock because it's so hit and miss.. So with that being said I would strongly suggest going to 6"

I have been thinking about getting a nice 3/32 to try for color sanding, to see if I would have better luck with it, so I think you just saved me some money jim.. lol.
Click to expand...

Maybe try this one out?

Dynaorbital Spirit 6" x 3/32" sander $91.24

Mrs. Santa bought me a 5" . I will just order 5" paper online and make the best of it!
 
crashtech;33325 said:
Seems to me that a 6" pad could be put on a DA that came with a 5"? Never tried it, though.
Click to expand...

I have done that a number of times with my old CP da, it came with 6" and I put a 5"on it. Had a bit more vibration, but worked fine. Might shorten the bearing life some.

It seemed to me that when using the 5" pad the CP sander had more power. I think this is due to the smaller diameter pad requiring less torque , maybe 15%? Doesn't matter now, I got the 5" Dynabrade and will try a 6 inch pad on it. Their parts breakdowns show different counter weight shafts for the 5" and the 6". I'll save the $85 for a shaft and just use it until it dies and then order another one, with 6" pad for $92 ;)
 
I use 6" for my autobody and 5" for my woodshop,
but I typically switch pads for all my sanders to be able to use both.
I like 6" better but if I find a good deal on 5" I'll buy it.
I can use it on any of them.
My Porter Cable RO sander has different eccentric weights
to change for 5 or 6 but I really never could tell a difference
so I usually don't even change them.
 
My dynabrade was a 5 inch I bought a new pad and counterweight for. Like JC I use 5 inch for woodworking as well.
 
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