GE GEH-5304A Bolt Tightening Torque Values, Accessory Mounting, Brakes, Inspection After Starting

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GEH-5304A

Table 7

Bolt Tightening Torque Values

Thread Sizes

(UNC-2A)

1/4-20 5/16-18 3/8-16 1/2-13 5/8-11 3/4-10

Hex Head (C1C5) Grade 5

Medium Carbon Steel

(Without Lubricant)

Lb-Ft

N-m

7-9

10-12

13-17

18-23

24-30

33-40

60-75

80-100

120-150

160-200

210-260

280-350

For lubricated bolts, use 65% of value shown in Table 7.

L.Accessory Mounting

Provisions for mounting accessories on the commutator endshield is a standard feature. The rabbet has NEMA type C-Face mounting dimensions, including the mounting bolt holes. The standard stub shaft also permits coupling certain accessories.

To prevent injury from the rotating shaft, the stub shaft cover must be main- tained in position when the accessory mounting is not used.

Standard accessories are available as kits. These include a variety of tachometers, speed limit switches and brakes. A mounting adapter, which can be machined for various accessories, can be ordered separately.

M.Brakes

Flange mounted brakes may be mounted on the accessory rabbet. Since the accessory stub shaft is not suit- able for use with a brake, the standard NEMA commutator end shaft extension should be ordered when such use is planned. Standard brakes are designed for horizontal floor mounting only. When motors are sidewall

or ceiling mounted, the brake must be reassembled to maintain its relation to the horizontal. Where motors are to be mounted with the shaft greater than 15° from the horizontal, special brakes should be specified.

Improper selection or installation of a brake and/or lack of maintenance may cause brake failure, which can result in damage to property and/or injury to personnel. (Refer to the separate instruction book pertaining to the brake fur- nished.)

N.Inspection After Starting

The following items should be checked after the machine is running:

1.Bearings

Ball bearing or roller bearing housing temperature should be no more than 80°C (176°F). Excessive bearing temperature may be caused by misalignment or improper greasing (Refer to Alignment and Bearing Maintenance sections.)

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Contents Instructions Copyright 1985, 1992, 1999 General Electric Company Table of Contents Storage of Renewal Parts II. Receiving StorageHandling Typical Weights LocationMounting AlignmentCoupled Drive Grouting Belt DrivesBearing Life Belt Tension Factor, Kb Thrust Loads Special Load ConsiderationsPinion Drives Maximum Continuous Thrust Capacity, LbsBearings and Couplings Rectified Power SuppliesInspection Before Starting Commutator and BrushesSpeed Life Factor Less Than 500 Bearing Life at 1750 RPM Average Speed Vs. Load, WFrame Sizes CD2812AT and CD2813AT Power Supply Available Motor Field Heating ConnectionsProtective Devices ThermostatsWinding Accessories & Special Device MarkingsLead Markers Function A1, A2 F1, F2, F3, F4, etc. T1, T2, T3, T4, etcVentilation System General Mechanical InspectionBrakes Accessory MountingBolt Tightening Torque Values Inspection After StartingInspection After Short Time in Service Noise and VibrationDisassembly ReassemblyFrame Size CD2512AT- CD2813AT Average Replacement of BearingsRecommended Regreasing Periods Standard Bearings for CD2512AT-CD2813AT MotorsHigh Temperature-20F to 350F -28C to 176C Standard Temperature 15F to 212F -10C to 100CLow Temperature Sources of Supply for Bearing GreasesBrush Installation Brush Assembly CommutatorCommutator Diameters In Inches Waterproof Machines MechanicalShaft End Play Lubrication of Flexible CouplingsGEH-5304A Ues Testing Methods Visual Inspection Insulation Resistance MeasurementEffect of Temperature on Insulation Resistance Cleaning of WindingsOily Dirt Service Shop Cleaning Drying of WindingsRepair VI. Renewal Parts Storage of Renewal PartsWith or Without Electrical Shop Facilities Number of Duplicate Motors in Service DescriptionRecommended Spare Parts With Electrical Shop FacilitiesCommutator Check Chart Application Information for CD2512AT CD2813AT Frames GEH-5304A Dimensions, Air Openings for CD2512AT CD2813AT Frames All Air Flow Requirements For Separately Ventilated MotorsFrame 2512AT, 2513AT 2812AT, 2813AT Base Speed Renewal Parts For CD2512AT CD2813AT FramesAccessory Mounting CD2512AT CD2813AT Accessory Mounting CD2512AT CD2813AT GEH-5304A Type CD Frames 2512AT 2813AT 5HDGHU&RPPHQWV Detach and fax or mail to the address noted above Fort Wayne in 46801-2205 USA Isaac #

GEH-5304A specifications

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