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Reverse rotation on a motor

Discussion in 'Grinders' started by donnymac250, May 3, 2014.

  1. donnymac250

    donnymac250 Member

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    hello all . im ,looking for a new motor . as mine is still throwing many shocks and im hearing a lot of electrical snap noises by the motor itself . ive been looking for one with a reverse rotation , but not having much luck .if i cant find one with a dual rotation set up . is it easy as pulling the shaft with the winding out and putting it in the other end . or do i have to deal with disconnecting and re hooking up those wires . thanks don
     
  2. stevebates

    stevebates Active Member

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    You won't be able to dismantle and change a TEFC motor the windings and end bells are set in a certain way and I doubt you could flip the stator in the housing. I would recommend a TEFC farm duty motor and that way you can reverse the rotation with the leads. A 1.5HP Marathon Electric motor is Approx. $220.
     
  3. donnymac250

    donnymac250 Member

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    ok thanks steve
     
  4. dancom

    dancom Dust Maker

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    Don, I messaged you about a 1 HP WEG motor for sale on Kijiji (Kelowna) that might keep you going. Reversible direction.

    Dan
     
  5. donnymac250

    donnymac250 Member

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    ok i sent message back , thats in kamloops though 2 hrs away . but thanks though .
     
  6. donnymac250

    donnymac250 Member

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    ok well im going to buy a used table saw tomorrow for 50 bucks . my main reason is the newer 1 hsp baldor motor . im hoping the 1 hsp will be enough power , and that i can reverse the direction of the rotation . i have read that some people use 1 hsp , and seem to get by .
     
  7. stevebates

    stevebates Active Member

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    When I first built my grinder I had a 1HP motor and the next day traded for a 1.5HP. the main reason is I could grind on the 1hp but when hogging steel it was too easy to bog out thus jumping my belts. I still have the 1.5 and would prefer a 2hp but 1.5 is fine. Also my main concern is you probably won't be able to reverse a table saw motor if built specifically for the saw because it won't have the end winding leads brought in to the junction box to allow the swap (assuming a 110V motor). Typically a 110v revers able motor will be of farm duty rating and will allow the swap by configuring the windings. A 2 lead motor you won't be able to swap though. Hope this is some help?
     
  8. donnymac250

    donnymac250 Member

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    thanks steve . ya im still worried about the power issue . speaking of belt jumping when i push to hard on my 2hsp motor my belt jumps still , but it still turns just fine . i wonder if thats not enough belt tension ? i will still pick the motor up for $50.00 , can use the frame stand to hold my new forge . and make a buffer wheel set up out of the motor .as per the guy who is selling the motor , he said its a newer industrial baldor motor and its able to reverse the direction ?
     
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  9. dancom

    dancom Dust Maker

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    Don, You can't go wrong on a $50 table saw with a Baldor motor. I have always found table saws to be excellent sources of cheap single phase motors.

    You can figure it out by looking at the saw. If the motor hangs to the left of the blade (when viewed from the front of the saw) it has to run CCW (when viewing the front of the motor) or the blade wouldn't run the right direction. If the motor hangs to the right then it's running CW to have the blade going the right way. Of course, I am assuming it's a good old belt drive contractor's saw.

    Let us know how it goes!

    Dan
     
  10. stevebates

    stevebates Active Member

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    Yes for sure Donny, for $50 snap that thing up that a an awesome price and you sure would be able use in many applications. You can't go wrong.
     
  11. Icho-

    Icho- Staff Member

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    I am using 1hp with variable speed and I would do it again. If I am flat grinding a larger blade and put a lot of pressure on it I do notice it bog slightly but it still gets the job dome nicely. One day when I actually make a new grinder I may consider using this motor set up to make my Logan lathe variable speed and get 1. 5 or 2hp for the grinder.
     
  12. donnymac250

    donnymac250 Member

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    hell ya , i have just created my first non shocking belt grinder . new motor works awesome switched two wires and now have reverse rotation .i pushed very hard and this motor did not seem to bog down at all . did not take the saw it self ,way to heavy and it was a older with a 9 " blade , besides i already got a good table saw . so i got the motor for $40.00.wow a non shocking motor who would have thought lol .
     
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  13. dancom

    dancom Dust Maker

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    That's great that you got it sorted out. Seems like the motor had a dielectric failure somewhere. Luckily you seriously zapped.

    Dan
     
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