2018 Marathon Motors Catalog

50 Designed for 50 Hz operation

141 Includes base

51 Resilient rings not included, see accessory section

142 Proofing switch included

52 1/2” x 1-7/8” shaft with 1-5/8” flat

143 303 stainless steel shaft

53 1/2” shaft with 5/8” adapter and key

144 Open dripproof

han NEMA)

54 30 minute duty cycle, not rated for continuous duty

145 Includes 6’ cord and switch

55 Shaft ext 3-13/16” L by 5/8” dia., 3.5” keyway

2:1 Suitable for 2:1 CT operation; consult “R164 rework” table for fan change pricing to upgrade to 10:1 CT

A NEMA ® design A

56 1-5/8” thru-bolts, shaft end

57 Open construction

B NEMA design B

58 Capacitor supplied with motor

C NEMA design C

ft dia. /56 slotted

59 TEAO construction

d Will become build-up item when current stock is gone

60 Foot locating set screws on frame, 90° apart

E Design incorporates electronic switch

61 10” Leads

F Class F Insulation

62 43” Leads

H Class H insulation

on a 4.42”

63 1-1/2” Thru-bolts, opposite shaft end

I

Reduced HP @ 120 HZ

64 50” Leads

N Totally enclosed, non-ventilated

65 Mounting accessories and DE resilient ring not included. Use kit 161L131AB1 for resilient ring mounting.

P BCP (Bearing Current Protection)

66 Sealed switch design

Q “Quick connect” terminal board

67 Capacitor not included, see accessory section S Steel frame construction 68 Rated 60/50 hertz, 190/380 or 380 volt at next lower horsepower V Suitable for 10:1 CT 60 minute duty, otherwise 2:1 CT 69 50°C Ambient X XRI ® motor, ultra high efficiency design 70 Not nameplated 50 hz Z 56HZ with 7/8” shaft dia., 3-1/2” shaft height, and slotted 56 frame base 71 Includes length adapter bracket AH Conforms to GM 7EH and satisfies Ford ® EM-1 and GM 7EQ 72 Usable on 200/208 volts at 1.0 service factor AI Class A insulation 73 No hubs AL Aluminum frame construction 74 Split phase/capacitor run electrical design AQ Conforms to GM 7EQ and satisfies Fiat Chrysler ® NPEM-100, and Ford EM-1 75 C-Face addition may result in non-NEMA “BA”, dim. For new “BA” dim consult chart found in modification section BI Class B insulation 76 C-Face addition results in non-NEMA “AH” dim (+1.2” than NEMA). BP Separate power supply required for blower motor 77 Frame is drilled with 3 sets of footholes, 5010, 5011, and 5012 as standard. 5009 frame drilling available as build-up CD Suitable for Group C 78 Frame is drilled with two sets of footholes, 5012 and 5013 standard CF Consult factory for accessory kit and/or modification selection 79 Ball bearings on both ends suitable for direct connection. For belted applications, refer to customer service CT Suitable for 20:1 CT on vector drive, continuous duty or 2000:1 80 Rolled steel fan guard on 143T-145T ES Energy saver design 81 24” long #18 SO 2-conductor cord exit at 11 o’clock position F2 F2 conduit box location 82 Welded rigid base FN Drive has cooling fan 83 Shaft ext 1-7/8” long by 5/8” dia with 6-3/8” flange NE Exempt from NEMA Premium ® efficiency requirement 84 NEMA 145T C-face mounting with removable 182T rigid base NP Does not meet NEMA Premium efficiency 85 Not tach adaptable NS Single shielded ball bearings 86 2:1 constant torque speed range; RTM for greater torque capability PW Part winding start capability 87 10:1 constant torque available as build-up, RTM for price and availability RB Roller bearing on shaft end for belted load only 88 182T base and shaft height, 145TC mounting face and shaft dim SH Space heaters 89 Threaded NPT opening in conduit box SL Sound level exceeds standard 90 Not UL recognized TS Normally closed thermostats installed 91 Suitable for use on VFD at 208 volt VB Vibration not met 92 7/8” thru-bolts, shaft end VC Voltage change device feature for quick voltage changes 93 Permanent split capacitor-switchless YD 12 Leads for WYE-DELTA, part winding on low voltage, or across- the-line starting

apter to 5/8”

adapter to

x

Ford is a trademark of Ford Motor Company Corporation and is not controlled by Regal Beloit Corporation. General Motors is a trademark of LLC Limited Liability Company and is not controlled by Regal Beloit Corporation. Chrysler is a trademark of Group LLC Limited Liability Company and is not controlled by Regal Beloit Corporation. NEMA and NEMA Premium are trademarks of National Electrical Manufacturers Association. All Rights Reserved.