For information about electric motors, see page 1004. For information about

motor starters, see page 866.

NEMA 56 Dual Base/C-Face-Mount AC Motors 

Single-Phase Totally Enclosed Fan-Cooled (TEFC)

Enclosure

Three-Phase

Washdown

Enclosure

 Expand your mounting options—these NEMA 56

footprint motors (with variations as noted) have

both rigid base-mount and C-face configurations.

All are rated for continuous duty and have ball

bearings, Class B insulation rated to 266° F

(unless noted), and lead wires for electrical

connection. The motors can be used in either

clockwise or counterclockwise rotation; instructions

are included. Full load amps shown are at the

motor's lowest voltage. Housing is steel.

 Single-Phase Motors— These motors have a

"start" capacitor to boost the starting torque

175-300% of the rated load. They're more efficient

than split-phase motors. Three-Phase Motors—

Have higher starting torque, higher efficiency, and

lower current draw compared to same size

single-phase motors. They usually don't need

capacitors, switches, or relays for start-up and are

better for heavy duty applications.

 Totally enclosed fan-cooled (TEFC)

enclosures offer protection from the environment.

They have no vent openings and are cooled by an

external fan. Though not airtight, they're suitable

for nonhazardous, dirty, damp (but not washdown)

environments. Totally enclosed nonventilated

(TENV) enclosures are similar to TEFC, but have

lower hp and rely on cooling without a fan.

Washdown enclosures are for applications that

require frequent high-pressure washdowns.

They're also great for areas with extreme humidity.

Totally enclosed and fan cooled, they keep most

water out and release any water that does enter.

All have a Type 303 stainless steel shaft and

double-sealed, oversized ball bearings to resist

moisture and heat.

 Single-Phase 115/208-230 VAC @ 60 Hz Motors

 Full 

 O'all Load Service 

hp rpm Lg. Amps Factor Each

Totally Enclosed Fan-Cooled (TEFC) Enclosure

With No Overload Protection

 1/3 1725 10.44" 6.2 1.15 6135K53 $190.94

 1/2 1725 10.69" 8.0 1.15 6135K47 230.08

 1/2 3450 9.94" 7.0 1.15 6135K18 182.57

 3/4 1725 11.31" 10.8 1.15 6135K67 268.79

1 1725 11.81" 12.8 1.15 6135K69 267.57

1 3450 11.81" 12.0 1.15 6135K68 226.01

1 1/2 3450 12.31" 17.0 1.00 6135K71 283.47

Washdown Enclosure

With No Overload Protection

 1/2 1725 11.19" 8.8 1.15 59845K64 249.69

 3/4 1725 11.69" 10.8 1.15 59845K66 266.99

1 1725 12.19" 12.8 1.15 59845K68 292.64

1 1/2 1725 13.69" 19.0 1.15 59845K71 • 382.47

 Class F insulation rated to 311° F. • NEMA 56HC frame.

 Three-Phase 208-230/460 VAC @ 60 Hz Motors

 Full % Full 

 O'all Load Load Service 

hp rpm Lg. Amps Efficiency Factor Each

Totally Enclosed Fan-Cooled (TEFC) Enclosure

With No Overload Protection

 3/4 1725 10.81" 2.8 77 1.15 6135K22 $207.48

1 1725 11.31" 3.6 77 1.15 6135K24 256.88

Totally Enclosed Nonventilated (TENV) Enclosure

With No Overload Protection

 1/3 1725 9.56" 1.3 77 1.15 6135K19 172.17

 1/2 1725 10.06" 1.8 77 1.15 6135K21 197.83

Washdown Enclosure

With No Overload Protection

 1/2 1725 11.19" 2.0 74 1.15 59845K43 252.91

 3/4 1725 11.19" 2.8 77 1.15 59845K46 279.13

1 1725 11.69" 3.6 77 1.15 59845K48 291.82

2 1725 12.69" 6.2 81 1.15 59845K54 318.87

 Class F insulation rated to 311° F.

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NEMA 48 Base-Mount AC Motors

Single Phase Open Dripproof (ODP)

Enclosure with Rigid Base

 All of these motors have a NEMA 48 footprint with variations as noted. They're rated

for continuous duty and have ball bearings (except for 5989K52 , 5989K63 , and

5990K88 , which have sleeve bearings) and lead wires for electrical connection. The

motors can be used in either clockwise or counterclockwise rotation; instructions are

included. Full load amps shown are at the motor's lowest voltage. Housing is steel.

 Single-Phase Motors— These motors have a "start" capacitor to boost the starting

torque 200-400% of the rated load, unless stated otherwise. They're more efficient

than the split-phase motors and are Class B insulation rated to 266° F (unless

noted).

 Models 5989K91 , 5989K52 , and 5989K63 are split-phase motors, which deliver

a low-to-moderate starting torque that is 100-175% of the rated load without the use

of a capacitor.

 Models 6223K42 , K41, K43, K46, and K45 are permanent split-capacitor motors,

which have a capacitor in the circuit to store energy and offer a low starting torque

that is 30-150% of the rated load. Use them for high-cycle applications such as

direct-drive fans and blowers (they must be mounted in the fan's airflow for proper

cooling). They also have a NEMA 48Z frame.

 Three-Phase Motor— Has a higher starting torque, higher efficiency, and lower

current draw compared to same size single-phase motors. It usually doesn't need

capacitors, switches, or relays for start-up and is better for heavy duty applications.

Class F insulation rated to 311° F.

 Open dripproof (ODP) enclosures are for reasonably dry, clean, well-ventilated,

and usually indoor environments. Totally enclosed fan-cooled (TEFC) enclosures

offer greater protection from the environment than ODP models. They have no vent

openings and are cooled by an external fan. Though not airtight, they're suitable for

nonhazardous, dirty, damp (but not washdown) environments. Totally enclosed

nonventilated (TENV) enclosures are similar to TEFC, but have lower hp and rely

on cooling without a fan. Totally enclosed air over (TEAO) enclosures are for use

within the airflow of a blower or fan they're driving.

 Rigid-base motors have a heavy-gauge base that's welded to the housing for

support. Resilient-base motors have rubber isolation rings between motor mounting

hubs and base to dampen vibration and shock.

 Single-Phase Motors

 Full 

 VAC @ O'all Load Service 

hp rpm 60 Hz Lg. Amps Factor Each

Open Dripproof (ODP) Enclosure (Unless Noted)

Rigid Base with No Overload Protection

 1/4 1725 115 8.9" 4.6 1.35 5989K91†• $116.42

 1/2 1725 115/208-230 9.62" 8.8 1.25 5990K16* 178.03

 1/2 3450 115/208-230 9.62" 6.8 1.25 5990K46* 121.02

Rigid Base with Automatic Overload Protection

 1/4 1725 115/208-230 8.87" 5.4 1.35 5990K41* 124.69

 1/3 1725 115/208-230 8.87" 6.6 1.35 5990K44* 142.60

Resilient-Base with Automatic Overload Protection— 1 5/8" Shaft Lg.

 1/4 1725 115 8.9" 4.6 1.35 5989K52¤• 107.81

 1/4 1725 115/230 9.33" 4.5 1.35 5990K87* 162.07

 1/3 1725 115 8.9" 5.9 1.35 5989K63¤ 109.38

 1/3 1725 115/230 9.9" 5.6 1.35 5990K88*• 143.90

Totally Enclosed Fan-Cooled (TEFC) Enclosure

Rigid Base with No Overload Protection

 1/3 1725 115/208-230 9.56" 6.6 1.15 5990K65* 168.28

 1/2 1725 115/208-230 10.31" 8.0 1.15 5990K68 192.47

Totally Enclosed Nonventilated (TENV) Enclosure

Rigid Base with No Overload Protection

 1/4 1725 115/208-230 9.43" 4.6 1.15 5990K63* 151.86

 1/2 3450 115/208-230 10.43" 5.8 1.00 5990K107* 161.73

Totally Enclosed Air Over (TEAO) Enclosure

Resilient Base with Automatic Overload Protection

 1/4 1100 115/230 9.78" 4.0 1.00 6223K42* 133.01

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EERE-2007-BT-STD-0007 COMMENT 30
 1/4 1700 115/230 10.12" 3.4 1.00 6223K41* 135.40

 1/3 1725 115/230 10.09" 3.6 1.00 6223K43* 158.84

 1/2 1100 115/230 11.05" 6.5 1.00 6223K46* 171.18

 1/2 1700 115/230 11.00" 5.5 1.00 6223K45* 173.62

† 1 5/8" shaft length.• Open enclosure.* Shaft has a flat instead of a

standard ANSI keyway.¤ Also has NEMA 56 mounting holes and an

adapter to convert shaft into a 5/8" dia. keyed shaft.

 Class F insulation rated to 311° F.

 Three-Phase 208-230/460 VAC @ 60 Hz Motor

 Full % Full 

 O'all Load Load Service 

hp rpm Lg. Amps Efficiency Factor Each

Totally Enclosed Nonventilated (TENV) Enclosure

Rigid Base with No Overload Protection

 1/3 1725 9.68" 1.4 78 1.15 6136K68 $175.37

1006

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