MD/MC Motor

Threaded Adapter

Installation Instructions


Alignment is a one-time adjustment performed at initial installation. This instruction is for mounting threaded adapters to MD and MC series motors. Applicable motors are MD802, MD602, & MC602 through MD824, MD624, & MC624. The parts included are a Threaded Adapter and Mandrel Shaft or adapter plate(s) with Run Out (Tilt) Adjustment and the hardware to mount the Mandrel Shaft or adapter plate(s) to the tapered motor shaft.

1. Threaded Adapter Installation

Reference drawing 550A0223-1 and 550A0223-2 and applicable Outline Drawings

Tools required: Open end wrench for mounting threaded tapered adapter to motor shaft, and 1/4" hex key and/or 1/2" wrench or adjustable wrench for mounting mandrel shaft or adapter plate to threaded nut adapter

1.1 Prepare motor shaft by removing any dirt, debris, burrs, or other protrusions from the area where the adapter surfaces will meet the motor shaft. A wire wheel, wire brush, sandpaper, and files are tools needed for this procedure.

1.2 Clean the inner surface of the threaded adapter to be mounted to the motor shaft.

1.3 Mount the threaded adapter onto the threaded end of the motor shaft. Using wrench drive adapter onto the tapered end of the shaft. Torque requirements are the same as if mounting nut onto the motor. The adapter will seat with the motor taper. There should be no visible gap between adapter taper and motor taper. If gap exists, remove and repeat from section 1.1.

1.4 Clean the contact surfaces of the threaded adapter and mandrel shaft or adapter plate. Using 1/4" hex key or wrench mount the mandrel shaft or adapter plate or plates to the threaded nut adapter with (3) 5/16-18 screws and torque 14 to 16 ft-lbs., or (3) 5/16-18 hex head bolts and torque 20 to 25 ft-lbs.

Note: There are several types of mandrel shafts or adapter plates that can be mounted onto the threaded adapter. All shafts mount onto the adapter and are adjusted for run out (tilt) the same way. The following Installation drawings are representative of the various mounting applications.

For CC340T: drawing # 550A0235-1, 550AO235-2, 550AO235-3

For CC550T: drawing # 550AO224-1, 550AO224-2, 550AO224-3

2. RUN OUT - TILT- Alignment Procedure

Run Out Adjustment - Tilt - Acceptable Tolerance +/- 0.001"

Objective: To align the mandrel shaft +/- 0.001" perpendicular to the motor shaft.

Reference the following drawings as well as applicable Outline Drawings

For CC550T: drawing # 550A0225-1, 550A0225-2, 550A0225-3

For CC340T: drawing # 550A0236-1, 550AO236-2, 550AO236-3

Tools required: 3/16" long arm hex key, 1/4" hex key, and 1" dial indicator* scaled by 0.001" with magnetic stand

*Dial indicators scaled by 0.0001" can be used, but it is best to start with the indicator

above until run out alignment is roughed to approximately 0.01"

2.1 The adjusting tilt screws are marked 1, 2, & 3.

2.2 Set the dial indictor on the mandrel shaft or onto the CC340T as shown in the applicable installation instruction drawing. Mount the CC340T to the adapter plate per CC340T Installation Instructions.

2.3 Rotate the motor shaft identifying the highest reading on the dial indicator. Because of the three tilt adjusting screws, the high reading can be located between two numbers.

2.4 Stop the motor shaft as close as possible to the dial indicator high reading. Set the dial indicator to zero. If this is in between two numbers, mark the location with a magic marker.

2.5 Rotate the motor and record the difference between the high and the low readings.

2.6 Stop the motor as close as possible to the dial indicator and the high reading as in section 2.4.

2.7 Take the 3/16" hex key and screw in on the high area. The dial indicator should move in the direction of the low, adjusting just half the difference.

2.8 Continue adjustment to achieve acceptable tolerance of (+/-0.001"). For more information on fine adjustment, reference the section 2.8.1 and Notes 1 and 2. If acceptable, reference section 2.9 for applicable sensor mounting instructions.

2.8.1 The high point may be located at a screw, or between two screws. In order to bring the tilt into acceptable tolerance it is most likely the case where two screws will need to be adjusted dependently, but in combination with each other. This procedure will be trial and error. First make an adjustment with the screw that is the highest, then adjust the other screw. Set dial indicator to zero, rotate the motor and record the amount difference. Going through the process of tightening, loosening, rotating and recording, will bring the tilt into acceptable tolerances.

NOTE 1: The tilt adjustment screws will not be flush with the adapter after installation. It will take several turns of the tilt screw before coming in contact with the adapter. These screws have a nylon insert and will require more torque to screw into the mandrel shaft or adapter plate.

NOTE 2: In the rare cases where the tilt adjustment screws have been screwed in as tight as possible, but still more adjustment is needed, with a 1/4" hex key break the 5/16-18 socket head cap screws or with a wrench break the 5/16-18 hex head bolts mounting the Mandrel Shaft or adapter plate to the adapter, reference applicable installation drawings. Only break the screw or screws where adjustment is needed, (high) do not break the low screw(s). Break is defined as turning a fraction of a turn, where the relief of stress due to the force exerted on the screw is removed. Because of this force in order to break the screw sometimes the screw(s) are loosened too much. Just snug the screw(s), not applying more than 20 in./lb. of torque to the screw. Continue to adjust. If more adjustment is needed, repeat this process. Continue until tilt adjustment is acceptable.

2.9 After aligning to acceptable tolerances, continue to install sensor onto mandrel shaft per applicable sensor mounting instructions as follows: CC550T Installation Instruction, CC340T Installation Instructions.