Made to demanding specifications these motors feature the same quality as the motors we install in our heavy-duty machines. all our motors are standard nema 56 frames and fit over 90% of the woodworking machinery on the market. if you have applications where dust oil chip or other foreign particles are the norm rather than the exception you should use the totally enclosed fan cooled motors (enclosed). by popular demand we have added the open drip proof motors (open). these high quality motors are excellent replacement motors for use in relatively clean environments. ideal for drill presses fan and bench machinery all motors are dual voltage (110/220v) capacitor start. they feature standard nema 56 frames all ball bearing construction reversible rotation 5/8-Inch shafts and are rated for continuous duty. type: open size: 1/2 hp rpm: 1725 amps at 110v/220v: 8.8/4.4.