For information about electric motors, see page 1004 . For information about motor starters, see page 866

. 

# NEMA 56 Base-Mount AC Motors (Continued from previous page)

Single Phase Open

Dripproof (ODP) Enclosure with Rigid Base Three Phase Totally Enclosed Fan-Cooled (TEFC) Enclosure with Rigid Base

All of these motors have a NEMA 56 footprint with variat ions as noted. They're rated for continuous duty and have ball beari ngs (except for 5990K92and 5990K94, which have sleeve bearings), Class B insulation rated to 266° F (unless noted), and lead wires for electrical connection (except for 5990K14

, 5990K17

, 5990K21

, 5990K92

, 5990K31 , and 5990K94, which have a terminal board electrical connection). The motors can be used in either clockwise or counterclockwise rotation; instructions are include d. 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 split-phase motors. Capacitor start/capacitor ru n motors have a "start" capacitor as well as a "run" capacitor for higher efficiency and lower o perating temperatures. Model 6223K49is a permanent split-capacitor motor. It has a capacitor in the circuit to store energy and offer a low starting torque that is 30-150% of the rated load. Use itfor high-cycle applicati ons such as direct-drive fans and blowers (it must be mountedin the fan's airflow for proper cooling).

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 re lays for start-up and are better for heavy duty applications.

Open dripproof (ODP) enclosures are for reasonably dry, clean, well-vent ilated, 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 maximum support. Resilient-base motors have rubber isolation rings between the motor mounting hubs and base to dampen vibration and shock. Single-Phase Motors (Cont.) Full VAC @ O'all Load Service hp rpm 60 Hz Lg. Amps Factor Each 

### Totally Enclosed Fan-Cooled (TEFC) Enclosure Rigid Base with No Overload Protection 1/2 3450 115/208-230 9.94" 7.0 1.15 5990K71 $168.27 3/4 1140 115/208-230 13.31" 10.6 1.00 5990K74 * 355.12 3/4 1725 115/208-230 11.31" 10.8 1.15 5990K73 229.63 3/4 3450 115/208-230 11.31" 10.0 1.15 5990K72 181.06 1 1725 115/208-230 11.81" 14.0 1.15 5990K76 249.54 1 3450 115/208-230 11.81" 12.0 1.15 5990K75 202.93 1 1/2 1725 115/208-230 12.81" 17.2 1.00 5990K81 * 280.21 1 1/2 3450 115/208-230 12.31" 17.0 1.00 5990K79 260.55 Rigid Base with Manual Overload Protection 1 3450 115/208-230 11.81" 12.0 1.15 5990K101 213.56 2 3450 115/208-230 13.31" 20.0 1.00 5990K102 ¤ 315.80 Rigid Base with Automatic Overload Protection 1/2 1725 115/208-230 10.69" 8.0 1.15 5990K35 193.46 3/4 1725 115/208-230 11.31" 10.8 1.15 5990K36 254.69 1 1725 115/208-230 12.31" 12.8 1.15 5990K99 269.06 

### Totally Enclosed Nonventilated (TENV) Enclosure Rigid Base with No Overload Protection 1/4 1725 115/208-230 9.81" 4.6 1.15 5990K55 167.48 

### NEMA AC Motors http://www.mcmaster.com/ctlg/DisplCtlgPage.aspx?ReqTyp=CATALO...

1 of 3 2/22/2010 1:16 PM

### Totally Enclosed Air Over (TEAO) Enclosure Resilient Base with Auto matic Overload Protection 3/4 1075 115/230 13.56" 8.0 1.00 6223K49 † 246.07

*NEMA 56H frame; capacitor start/capacitor run.

¤NEMA 56H frame; Class F insulation rated to 311° F.

Class F insulation rated to 311° F. †NEMA 56HZ frame. Three-Phase 208-230/460 VAC @ 60 Hz Motors Full % Full O'all Load Load Service hp rpm Lg. Amps Efficiency Factor Each 

### Open Dripproof (ODP) Enclosure Rigid Base with No Overload Protection 1/2 1725 9.99" 1.9 68.0 1.25 6136K53 $176.11 3/4 1725 10.49" 2.7 75.0 1.25 6136K54 194.88 1 1725 10.38" 4.2 78.5 1.15 6136K56 207.98 1 3450 9.84" 3.2 77.0 1.25 6136K55 223.06 

### Totally Enclosed Fan-Cooled (TEFC) Enclosure Rigid Base with No Overload Protection 1/2 1140 11.31" 2.4 70.0 1.15 6136K73 280.95 3/4 1140 11.81" 3.0 75.5 1.15 6136K76 286.35 3/4 1725 10.81" 2.8 77.0 1.15 6136K75 213.08 1 1725 11.31" 3.6 77.0 1.15 6136K78 226.23 1 3450 10.81" 3.2 77.0 1.15 6136K77 240.71 1 1/2 1725 11.81" 5.0 78.5 1.15 6136K81 244.18 

### Totally Enclosed Nonventilated (TENV) Enclosure Rigid Base with No Overload Protection 1/4 1725 9.56" 0.9 78.0 1.15 6136K671 158.32 1/3 1725 9.56" 1.3 77.0 1.15 6136K691 199.61 1/2 1725 10.06" 1.8 77.0 1.15 6136K72 227.29

Class F insulation rated to 311° F. 

# NEMA 56C C-Face-Mount AC Motors

The mounting face has tapped holes and a raised rim so you can mount these motors directly to equipment with a matching configuration. All are rated for continuous duty and have permanently lubricated 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 counterclockw ise 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. Capacitor start/capacitor run motors have a "start" capacitor as well as a "run" capacitor for higher efficiency and lower operating temperatures.

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.

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 Single-Phase Open Dripproof (ODP) Enclosure Three-Phase Totally Enclosed Fan-Cooled (TEFC) Enclosure 

### NEMA AC Motors http://www.mcmaster.com/ctlg/DisplCtlgPage.aspx?ReqTyp=CATALO...

2 of 3 2/22/2010 1:16 PM

# NEMA 56C C-Face-Mount AC Motors

enclosed nonventilated (TENV) enclosures are similar to TEFC, but have lower hp and rely on cooling without a fan.

Single-Phase 115/208-230 VAC @ 60 Hz Motors Full O'all Load Service hp rpm Lg. Amps Factor Each 

### Open Dripproof (ODP) Enclosure With No Overload Protection 1/4 1725 9.24" 5.4 1.35 6135K16 $146.97 1/3 1725 9.24" 6.6 1.35 6135K42 155.91 1/2 1725 9.99" 8.8 1.25 6135K44 177.00 1/2 3450 9.99" 6.8 1.25 6135K43 153.53 3/4 1725 10.99" 10.8 1.25 6135K46 215.59 1 1725 10.88" 12.8 1.15 6135K48 256.43 1 1/2 1725 11.84" 17.2 1.15 6135K51 o 298.74 With Automatic Overload Protection 1/3 3450 8.99" 5.6 1.35 6135K41 155.90 

### Totally Enclosed Fan-Cooled (TEFC) Enclosure With No Overload Protection 1/2 1725 10.69" 8.0 1.15 6135K7 191.88 1/2 3450 9.94" 7.0 1.15 6135K6 168.38 3/4 1725 11.31" 10.8 1.15 6135K14 227.27 3/4 3450 11.31" 10.0 1.15 6135K56 195.03 1 1725 11.81" 12.8 1.15 6135K15 260.27 1 3450 11.81" 12.0 1.15 6135K57 210.77 1 1/2 1725 12.81" 17.2 1.00 6135K17o 327.58 With Manual Overload Protection 1 1/2 3450 12.31" 17.0 1.00 6135K58 283.44 2 3450 13.31" 20.0 1.00 6135K61 353.64 

### Totally Enclosed Nonventilated (TENV) Enclosure With No Overload Protection 1/4 1725 9.80" 4.6 1.15 6135K2 170.64 1/3 1725 10.30" 5.2 1.15 6135K4 158.20 1/3 3450 9.30" 3.8 1.00 6135K3 146.57

oCapacitor start/capacitor run. Class F insulation rated to 311° F. Three-Phase 208-230/460 VAC @ 60 Hz Motors Full % Full O'all Load Load Service hp rpm Lg. Amps Efficiency Factor Each 

### Open Dripproof (ODP) Enclosure With No Overload Protection 1/3 1725 9.49" 1.5 64.3 1.35 6135K73 $144.84 1/3 3450 9.31" 1.4 68.0 1.35 6135K28 115.69 1/2 1725 9.99" 1.9 68.0 1.25 6135K75 155.66 1/2 3450 9.31" 1.8 69.0 1.25 6135K74 145.49 3/4 1725 10.49" 2.7 75.0 1.25 6135K77 197.07 3/4 3450 9.81" 2.4 79.0 1.25 6135K49 213.35 1 1725 10.38" 4.2 78.5 1.15 6135K79 197.06 1 3450 9.88" 3.2 77.0 1.25 6135K5 199.44 1 1/2 3450 10.84" 4.2 81.5 1.15 6135K62 232.55 

### Totally Enclosed Fan-Cooled (TEFC) Enclosure With No Overload Protection 1/4 1725 9.69" 1.2 58.0 1.15 6135K29 172.15 3/4 1725 10.81" 2.8 77.0 1.15 6135K33 202.12 3/4 3450 10.81" 2.4 75.5 1.15 6135K88 199.33 1 1725 11.31" 3.6 77.0 1.15 6135K34 212.55 1 3450 10.81" 3.2 77.0 1.15 6135K89 223.98 1 1/2 1740 11.81" 5.0 78.5 1.15 6135K36 224.99 1 1/2 3450 11.81" 4.2 81.5 1.15 6135K91 224.97 2 1725 12.81" 6.2 81.5 1.15 6135K93 266.19 2 3450 12.31" 5.6 82.5 1.15 6135K92 268.57 

### Totally Enclosed Nonventilated (TENV) Enclosure With No Overload Protection 1/3 1725 9.56" 1.3 77.0 1.15 6135K1 162.52 1/3 • 9.90" 1.1 77.0 1.15 6135K86 152.54 1/2 1725 10.06" 1.8 77.0 1.15 6135K8 190.44 1/2 3450 10.40" 1.6 82.5 1.15 6135K87 178.06

•3450/2850 rpm.

1005 

### NEMA AC Motors http://www.mcmaster.com/ctlg/DisplCtlgPage.aspx?ReqTyp=CATALO...

3 of 3 2/22/2010 1:16 PM