Any quality disc "sanders" out there?

logem said:
When I was looking to build or buy a disk grinder for myself, I decided to build my own and use a 1 hp motor. Although the Trugrit T-95 was very appealing, I decided against it because of the 1/2 hp motor. In my opinion, you will want a 1 hp motor for grinding steel. I can stall my 1 hp with a 9" disk quite easilty, and wish I had 2 hp but no disks are available with an arbor hole large enough for motor shafts on 2 hp motors. Buy as much as you can afford.

Mike L.
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Providing there is enough material on the disk hub, enlarging the 5/8" hole and broaching an appropriate keyway for the new motor should be very doable.
 
logem said:
When I was looking to build or buy a disk grinder for myself, I decided to build my own and use a 1 hp motor. Although the Trugrit T-95 was very appealing, I decided against it because of the 1/2 hp motor. In my opinion, you will want a 1 hp motor for grinding steel.

I can stall my 1 hp with a 9" disk quite easily, and wish I had 2 HP but no disks are available with an arbour hole large enough for motor shafts on 2 HP motors.
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why can't you find a 2HP motor on a 56 frame and 5/8" shaft ?

http://www.automationdirect.com/adc...-Phase_Motors,_56C_(0.33_-_2HP)/MTR-002-3BD18
 
Anybody have input to my question in post #12? I was wanting to know If there is a way to run a 3 phase motor (since that seems to be the only way to use a VFD, and all 3 Phase motors seem to be in the 220 volt range as far as I know) using the 110 volts my shop runs on. Somebody mentioned my use of an extension cord, I run my 1 HP 2x72" NWG on it all the time as well as having other lights etc plugged in and turned on and have not had any problems yet. Everthing is pugged into a power strip with a reset, or circut breaker or w/e it's called. I know pheer grinders makes variable speed belt grinders for guy that only have access to 110 volts, but like I said I have no idea how this stuff works, which was why I was looking into disc "sanders" in the first place. Thanks

-Paul
My Channel Lsubslimed
 
I had a 2hp 3ph motor already when I built my disc grinder. Only it had a 7/8" shaft. I had the shaft turned to 3/4" and a new key way broached. Cost about $80. Jess
 
coldsteelburns said:
I was wanting to know If there is a way to run a 3 phase motor (since that seems to be the only way to use a VFD, and all 3 Phase motors seem to be in the 220 volt range as far as I know) using the 110 volts my shop runs on.
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That's in my standard reply every time.




KB electronics KBAC27D

http://www.bladeforums.com/forums/s...o-start-making-knives?p=13881086#post13881086

VFD Variable Speed made simple

Step pulleys are not as cheap as you may think
Maska steel pulleys are good, plus shaft, bearings, belt

It all adds up to 1/2 the price of a sealed class NEMA 4 VFD like a KB Electronics KBAC-27D

I like direct drive with no belts, a VFD and 3 phase motor for about $200 over the price of the step pulleys with fine instant control.

NEMA 1 VFD’s will keep your fingers out, but the metallic dust intrusion will smoke it.


Motor
3 phase 220v 1.5 HP motor, TEFC, frame 56 or 56C,
RPM is up to you some use 1700 RPM at double speed.
Make sure it has a footed base for the KMG and NWG, or a C flange face mount for Bader, Bee, Wilton and GIB styles.
I get them on ebay, even with paying $100 for shipping to Canada I save $ on used motors

The 1.5 HP combination is the most common
It allows you to plug into any 110vac, 15 amp outlet.
A 2 HP motor requires a 220vac input.


VFD
KBAC-27D
http://www.kbelectronics.com/Variable_Speed_AC_Drives_Inverters/AC_Drives_NEMA_4X.html
http://www.kbelectronics.com/manuals/kbda_manual.pdf
Use the Distributor Locator to find a local source, online sources may be cheaper.

There are cheaper units, but the only VFD I have found that runs a 1.5 HP motor on a 110v 15 amp input is the KBAC-27D

It is NEMA 4, sealed from metal dust

Good community and company support, manuals, hook-up diagrams, photos and settings.
If you buy a bargain vfd, you're stuck with a chinglish manual and ridiculous programming.

Travis W reports running a 2 HP on a 110v circuit, but I haven’t tried it.

Hookup is simple
http://www.beaumontmetalworks.com/VS-setup.html
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PT Doc said:
I see that you still have the piece about Travis running 2hp on 110v. I think is confusing to newbies since in goes against all the specs of the Kbac drives.
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Apparently he has done it and it works.

It does go against the specs of the manufacturer.

I don't verify it, but the info is there if people want to try it
 
The Pheer disk sander looks good. It certainly is priced right for a variable speed, 1hp unit. Anyone have experience with this brand?
 
Thanks count :) :thumbup: Does it have to be a 1.5 HP or can I do it done with a 1 HP? I guess the simple questions I'm trying to get answered with either a "yes" or a "no" are:

1.) Can I get a 220V motor and use a 110V input vfd to work with my 110V power in my shed?.. yes/no?

2.) Does the motor have to be a 3 phase in order to use a vfd?.. yes/no?

and if yes....

3.) Are there any 110 volt 3 phase 1 HP motors out there?

(I'm pretty sure I know the answers to those above questions, I'm guessing that question 1=yes 2=yes and 3=no? but I just want to be clear on these)

4.) And just out of curiosity, could a 1.5 HP VFD with 110V output be used with a 1 HP 3 phase motor? or do the HP on both have to match perfectly


Umm , well I guess those are the MAIN questions, but I'm sure the answers to those will spawn a few more :D ;)

Thanks again guys, I really appreciate your help and patience :) I'm the type of guy that needs specific answers to specific questions in order to understand how things work... at least most the time :o

-Paul
My Channel Lsubslimed
 
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lol still curious if anyone can answer those questions? :o The 4 questions in post #31 ... so this is a little bumpity bump.. :D

Thanks :)

-Paul
My Channel Lsubslimed
 
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coldsteelburns said:
Thanks count :) :thumbup: Does it have to be a 1.5 HP or can I do it done with a 1 HP? I guess the simple questions I'm trying to get answered with either a "yes" or a "no" are:

1.) Can I get a 220V motor and use a 110V input vfd to work with my 110V power in my shed?.. yes/no?

2.) Does the motor have to be a 3 phase in order to use a vfd?.. yes/no?

and if yes....

3.) Are there any 110 volt 3 phase 1 HP motors out there?

(I'm pretty sure I know the answers to those above questions, I'm guessing that question 1=yes 2=yes and 3=no? but I just want to be clear on these)

4.) And just out of curiosity, could a 1.5 HP VFD with 110V output be used with a 1 HP 3 phase motor? or do the HP on both have to match perfectly


Umm , well I guess those are the MAIN questions, but I'm sure the answers to those will spawn a few more :D ;)

Thanks again guys, I really appreciate your help and patience :) I'm the type of guy that needs specific answers to specific questions in order to understand how things work... at least most the time :o

-Paul
My Channel Lsubslimed
Click to expand...

1 Yes
But the KBAC 27D is the only one I"ve found that does that.
The teco and other cheap ones are 220 input only

2 Yes

3 No
Stick with the 220v 3 phase motors

4 Yes anything under the rating.
 
If you bore out a disk that was originally faced and bored in a single setup to eliminate runout you will introduce runout unless you finish the face again in the same setup. It may not matter for your application, but I know when I did a run of disks I wouldn't entertain the idea of modifying a finished disk because it would spoil the precision and balance.
 
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