Replies

1. 
   gb93433 | Mar 14, 2006 08:28am | #1

   Lots on ebay.com

2. 
   RickL | Mar 14, 2006 03:15pm | #2

   Consider a three phase belted model and adding a VFD and you will get variable speed as well as doubling the motor's speed and for 1 hp and under they will run off 120 single phase. I've seen a Baldor VFD at my local motor repair that I'm describing. Three phase tools are typically cheaper.

   
   

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   Edited 3/19/2006 3:57 pm ET by RickL

1. 
   highfigh | Mar 14, 2006 03:56pm | #3

   Three phase isn't usually available for residential customers, though.
   "I cut this piece four times and it's still too short."

1. 
   RickL | Mar 14, 2006 05:08pm | #4

   You are missing the point. A VFD will convert single phase and three phase machines are typically cheaper. The VFD also will allow the motor to be infinitely variable and can double the motors rated rpm. You can get a VFD for less than the difference of a single phase variable speed industrial drill press. A VFD will only work on a three phase motor. Knowing about VFD's is   very useful and important information for the many shop applications.

   Check out this as well...  http://coastaltool.com/cgi-bin/SoftCart.exe/a/delt/dp350.htm?L+coastest+dkdj2165ffc307c3+1142378416

    

   Edited 3/14/2006 10:34 am ET by RickL

3. 
   citrouille | Mar 16, 2006 01:11am | #5

   I already posted this recently, a DC motor with a speed controller works fine. Cheap too!

   C.

1. 
   twincoach | Mar 18, 2006 04:26am | #6

   DC motor  brushes x saw dust =motor repair

   VFD + three phase tecf motor x saw dust = no problem

   I was a maintance electrician in a printing plant with loads of dc motors and paper dust same as fine saw dust I spent a lot of time repairing shorted armatures and worn brushes now I work in a chemical plant lots of three phase and vfd and fumes and dust not to many failures from dirt on three phase motors

   Jerry

   ps we make glue for RV builders

1. 
   citrouille | Mar 18, 2006 01:55pm | #7

   Permanent magnet DC motors have no brushes.
   Routers have brushes, I have used my router day in and day out for decades, all I had to do is replacing worn out brushes.
   I still think a DC motor is as good as a 3 phase motor at a fraction of the cost.C.

1. 
   RickL | Mar 19, 2006 11:02pm | #8

   Where are you getting pricing so low on DC motors? In my Graingers there is a 1 hp DC motor and control for $650. I can buy a VFD for around $140 and three phase motors are available from a scrap yard for next to nothing. Most of the lathe manufacturers are using VFD technology for their drive systems as oppposed to DC motors. Aslo most industrial machines are three phase so why go the extra expense of a DC motor and controller when a VFD will do the job and cheaper. I don't see DC motors as being any cheaper than a new three phase motor.

   Edited 3/19/2006 4:44 pm ET by RickL

1. 
   citrouille | Mar 20, 2006 03:02am | #9

   Try http://www.surpluscenter.comC.

2. 
   RickL | Mar 20, 2006 03:51am | #10

   Yeah... I buy from them. 3 phase motors are still cheaper than DC motors. VFD's from http://www.factorymation.net/s.nl/sc.2/category.13/.f are really priced well, so I can still do it cheaper with 3 phase motor and a VFD.

3. 
   citrouille | Mar 20, 2006 11:09pm | #13

   Obviously your mind is made up and I don't want to try to impose my way of thinking upon you, but for the rest of you guys out there interested in having a variable speed drill press at a fraction of the cost, you can buy a 2 1/2 HP DC motor for $21.95 and a controller for $29.95 at Surplus Center, add $10 at the most for a potentiometer and a reverse switch and a few bucks for shipping... you guys can do the math.C.

4. 
   thr | Mar 21, 2006 01:50am | #14

   Can you link to the 29.00 controller, I went to their website and the only controller I saw was 140.00

   Thanks

5. 
   citrouille | Mar 21, 2006 01:56pm | #15

   It's item #11-2449, here are the specs:
   Input: 115 VAC
   Output: 0-130 VDC
   8 amps continous DC output @ 10 amps AC inputC.

6. 
   2x4 | Mar 20, 2006 04:01am | #11

   It is unfortunate that there is such a misunderstanding of Rotary phase converters and VFD,s. I agree with you completely on your initial suggestion.

   Brian

7. 
   RickL | Mar 20, 2006 03:36pm | #12

   Not only on VFD and rotary converters, statics as well.  And there's a new game in town.  http://www.phaseperfect.com  A bit more expensive but allows more than one machine  with different hp ratings at a time.

   A few folks totally missed the boat on what I was talking about. Oh well...

   Edited 3/20/2006 8:36 am ET by RickL