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

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# 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 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. 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.

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. 

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

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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 foot print 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. Us e 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 fa n. 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 Automa tic 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 Auto matic Overload Protection 1/4 1100 115/230 9.78" 4.0 1.00 6223K42 * 133.01 

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

2 of 3 2/22/2010 1:18 PM1/4 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 

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

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