Frequently Asked Questions

Yes. In general, electric motors up to and including 447T frame can be mounted vertically shaft up and down. Electric motors installed vertically must be protected from weather conditions, especially water penetration e.g. drip covers installed for shaft down outdoor operation. Larger electric motors are horizontal operation only. See individual product pages for details.

All NEMA motors are equipped with bidirectional fans.

It depends on the electric motor application. A drive-end (DE) roller bearing is always preferred for belted drive electric motor applications. In direct coupling applications, always use ball bearing motors.

20 and 31 Series motors up to NEMA 286T/TS frame and equivalent metric up to and including IEC180L frames are equipped with double-shielded bearings greased for life. Larger electric motors have regreasable bearings. See individual product pages for details.

We typically use POLYREX® EM grease in our regreasable bearings. Please look to individual product manual for specific details and regreasing schedule.

It depends on how long the electric motor was stocked. Every AC motor with regreasable bearings which has been stocked for over 12 months has to be re-greased before usage.

It depends on the electric motor’s RPM and usage. Regreasable bearings should be re-greased according to the recommendation in the manual for that particular electric motor.

Standard metric motors have junction boxes located on the top (F3/F0). IEC90,100,112 frames have an option to relocate the box for F1/F2 positions (conversion) from stock.

Drain holes should be opened at the motor's lowest point when an electric motor is operating in a wet, high humidity atmosphere or low temperature environment. This gives moisture a pathway out of the motor so that it doesn't become trapped inside, which could otherwise cause the electric motor to short over time.

It means that the motors are equipped with D-Flange and Feet. Other common descriptions are as follows: IM B5 = D-Flange without Feet, IM B3 = Footed, IM B14 = C-Flange without Feet, IM B34 = C-Face and Footed.

NEMA motors starting from 320T frame and Metric motors starting from IEC 200 frame have shafts locked prior to shipment. It should be removed from the shaft before energizing the motor.

We offer removable feet on our AC motors as follows: 20N series 324T frame and up; Metric 20M series up to IEC 160 frame. Metric IEC 90 - IEC 112 frame also have rotatable feet.

Yes. NEMA and Metric Brake motors are offered with all the same flanges as our standard electric motors.

All 31N and 32N motors can be converted to F2 position. 40N and 20N series motors up to 286T frame can be converted to F2 position. Rolled Steel and 580 frame motors are F1 only.

We offer D-Flanges for 31N series motors ranging from 143TD-449TD and 20N series motors ranging from 324TD - 447TD.

NEMA 20N motors 320T up to 449T frame have a M20 threaded hole. All Metric iec motors have a threaded hole inside the end shaft according to IEC standard. See chart below.

Blowers will be required for all constant torque electric motor applications where the turn down ratio exceeds VFD capability of specific motor.