GE GEH-5304A manual Grouting, Belt Drives, Bearing Life

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GEH-5304A

Horizontal alignment should be corrected by shifting machines on the base.

b.Alignment Procedure

Flexible Couplings, Self-Supporting Bases

Before operating the machine, the base should be bolted down and the alignment checked as follows:

1.Remove all of the coupling bolts and slide the shells back so that the hub faces are ex- posed.

2.Check the coupling hub spacing in accordance with the outline dimensions with the units in the mechanical center of their end play.

3.Check parallel alignment by using a straightedge across the hubs at both vertical and horizontal locations or by clamping a dial indicator to one hub and indicating the other hub on its outside diameter. Be sure that the dial indicator supports do not bend or sag, since this will give inaccurate readings.

4.Use the dial indicator at hub faces and rotate both units together 90°, 180°, 270° and 360° or measure the gap at each position by inserting a feeler gage. The readings should not vary more than 0.002”.

5.Correct any vertical misalignment by shimming under the units. Horizontal alignment should be corrected by shifting machine on the base.

2.Grouting

On concrete foundations, a minimum of 1” should be allowed for grouting.

A rich, non-shrink grout should be used. High-grade grout mixtures are available commercially. If the grout is to be prepared at the site, a cement-sand ratio of 1:2 is recommended. No more than enough water should be used to give a stiff mixture. The clean but rough surface of the foundations should be wet and the grout forced or puddled under the base.

3.V-Belt Drives

The V-belt system produces a heavy shaft and bearing loading, making it necessary that these factors be considered carefully for proper application. Since belt drives impose a bending moment on the motor shaft, it is always desirable to have the motor sheave located as close to the motor bearing as possible to minimize both bearing load and shaft stress. This will result in increased bearing life. For the load centered 2” in toward the bearing from the end of the shaft instead of at the end of the shaft, the bearing load is reduced by 10% and the life increased by 33%. The bearing life curves that follow assume the load is centered at the end of the shaft. New improved V-belts are now on the market that significantly reduce the number and size of belts required for a given load. These new belts should always be considered, since the sheave will be shorter and the load centered closer to the bearing.

The standard NEMA shaft extension is designed for belted loads. Dimensions are provided on the standard dimension sheets. A sliding base is available as an accessory to facilitate belt adjustment.

4.Bearing Life

Bearing life for belted drives is determined by calculating the radial load at the end of the shaft.

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Contents Instructions Copyright 1985, 1992, 1999 General Electric Company Table of Contents Storage of Renewal Parts Storage II. ReceivingHandling Location Typical WeightsMounting AlignmentCoupled Drive Grouting Belt DrivesBearing Life Belt Tension Factor, Kb Pinion Drives Special Load ConsiderationsThrust Loads Maximum Continuous Thrust Capacity, LbsInspection Before Starting Rectified Power SuppliesBearings and Couplings 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 Protective Devices ConnectionsMotor Field Heating ThermostatsLead Markers Function Accessories & Special Device MarkingsWinding A1, A2 F1, F2, F3, F4, etc. T1, T2, T3, T4, etcGeneral Mechanical Inspection Ventilation SystemBolt Tightening Torque Values Accessory MountingBrakes Inspection After StartingNoise and Vibration Inspection After Short Time in ServiceReassembly DisassemblyRecommended Regreasing Periods Replacement of BearingsFrame Size CD2512AT- CD2813AT Average Standard Bearings for CD2512AT-CD2813AT MotorsLow Temperature Standard Temperature 15F to 212F -10C to 100CHigh Temperature-20F to 350F -28C to 176C Sources of Supply for Bearing GreasesBrush Installation Brush Assembly CommutatorCommutator Diameters In Inches Shaft End Play MechanicalWaterproof Machines Lubrication of Flexible CouplingsGEH-5304A Ues Insulation Resistance Measurement Testing Methods Visual InspectionCleaning of Windings Effect of Temperature on Insulation ResistanceOily Dirt Service Shop Cleaning Drying of WindingsRepair Storage of Renewal Parts VI. Renewal PartsRecommended Spare Parts Number of Duplicate Motors in Service DescriptionWith or Without Electrical Shop Facilities With Electrical Shop FacilitiesCommutator Check Chart Application Information for CD2512AT CD2813AT Frames GEH-5304A Dimensions, Air Openings for CD2512AT CD2813AT Frames Frame 2512AT, 2513AT 2812AT, 2813AT Base Speed Air Flow Requirements For Separately Ventilated MotorsAll 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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