What is a Variable Frequency Drive?
A variable frequency drive is an electronic device that allows you to start, stop, and control the speed of a three phase motor. It is also a motor starter as it is equipped with overload protection. Read more »
What is the difference between a 'new surplus' motor and a 'factory new' motor?
Our New Surplus electric motors and drives are new and unused overstock or discontinued items offered at lower prices and come with our 90-day warranty.

Factory New products are competitively priced and come with a manufacturers warranty.
Variable frequency drives (VFDs or inverters) now play an important part in major industry.
Within the last 10 years they have been perfected to control and vary the speed of 3 phase electric motors. They serve many purposes, besides speed control. Homeowners and hobbyist alike, who have lathes or milling machines with a 3 phase motor, usually don't have 3 phase power to operate. These VFDs (instead of using a rotary phase converter) can now be used to convert single phase power to 3 phase power. Read more »
 
 
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F421ES-Century-Dealers Industrial    F421ES
0.5 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 48, RESILIENT, Century, F421ES
$189.43
Out of Stock
F422ES-Century-Dealers Industrial    F422ES
0.5 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 56, RESILIENT, Century, F422ES
$191.13
F423ES-Century-Dealers Industrial    F423ES
0.5 HP, 1800 RPM, 230 Volts, 1 PH, ODP, 56, RESILIENT, Century, F423ES
$266.52
Out of Stock
F425-Century-Dealers Industrial    F425
0.75 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 56, RESILIENT, Century, F425
$241.11
Out of Stock
F426-Century-Dealers Industrial    F426
0.25/0.08 HP, 1800/1200 RPM, 115 Volts, 1 PH, ODP, 48Z, DOUBLE SPEED, RESILIENT, Century, F426
$171.81
Out of Stock
F427-Century-Dealers Industrial    F427
0.25/1/8 HP, 1800/1200 RPM, 115 Volts, 1 PH, ODP, 48Y, DOUBLE SPEED, RESILIENT, Century, F427
$211.20
Out of Stock
F428-Century-Dealers Industrial    F428
0.25/1/8 HP, 1800/1200 RPM, 115 Volts, 1 PH, ODP, 56Z, DOUBLE SPEED, RESILIENT, Century, F428
$199.59
Out of Stock
F429-Century-Dealers Industrial    F429
0.33/0.111 HP, 1800/1200 RPM, 115 Volts, 1 PH, ODP, 48, DOUBLE SPEED, RESILIENT, Century, F429
$273.24
Out of Stock
F430-Century-Dealers Industrial    F430
0.33/0.167 HP, 3600 RPM, 115 Volts, 1 PH, ODP, 56Z, DOUBLE SPEED, RESILIENT, Century, F430
$216.92
Out of Stock
F431-Century-Dealers Industrial    F431
0.5/0.167 HP, 1800/1200 RPM, 115 Volts, 1 PH, ODP, 56, DOUBLE SPEED, RESILIENT, Century, F431
$272.87
Out of Stock
F432-Century-Dealers Industrial    F432
0.5/0.25 HP, 1800/1200 RPM, 115 Volts, 1 PH, ODP, 56, DOUBLE SPEED, RESILIENT, Century, F432
$307.16
Out of Stock
F433ES-Century-Dealers Industrial    F433ES
0.25 HP, 1800 RPM, 110/220 Volts, 1 PH, ODP, 48, Century, F433ES
$242.32
Out of Stock
F434-Century-Dealers Industrial    F434
0.25 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 48Z, Century, F434
$126.71
Out of Stock
F435-Century-Dealers Industrial    F435
0.25 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 56Z, Century, F435
$125.46
Out of Stock
F436-Century-Dealers Industrial    F436
0.33 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 48Z, Century, F436
$138.59
Out of Stock
F437-Century-Dealers Industrial    F437
0.33 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 56Z, Century, F437
$159.50
F438-Century-Dealers Industrial    F438
0.33 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 56Z, Century, F438
$151.24
Out of Stock
F439ES-Century-Dealers Industrial    F439ES
0.5 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 48, Century, F439ES
$401.83
Out of Stock
F440ES-Century-Dealers Industrial    F440ES
0.5 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 56, Century, F440ES
$254.32
Out of Stock
F441ES-Century-Dealers Industrial    F441ES
0.5 HP, 1800 RPM, 115 Volts, 1 PH, ODP, 56, Century, F441ES
$353.72
Out of Stock

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