Admin Table of Contents
How do you check a motor pump alignment?
Measuring Misalignment
- With the motor and pump shaft flanges close to each other, but disconnected, mark a spot on each shaft, then measure the separation between them with a feeler or taper gauge.
- Rotate both shafts by about 90 degrees, keeping the marks close to each other.
How do you check shaft alignment with dial indicator?
For shaft alignment, we typically use dial indicators with 0.250″ – 0.300” total travel. The plunger moves a needle clockwise when pushed in and counter clockwise when let out. The face can be rotated so that the needle points to zero.
What are dial gauges or dial test indicators used for?
Dial Indicators are measuring devices used in mechanical and industrial applications. They are designed to measure in vertical or horizontal positions and typically used to measure clearances, tolerance, and variation in tolerance of machined parts to ensure accuracy.
How do you check pump alignment with a dial gauge?
To measure vertical misalignment, perform the following steps:
- Rotate the dial indicators to 6:00.
- Set the face dial indicator to read zero.
- Set the rim dial indicator to the sag value.
- Rotate both shafts (if possible) to 12:00.
- Record the DIR and DIF dial indicator TIR values.
How do you adjust a dial indicator?
Raise the plunger and slip a 0.020-inch gauge block underneath. Lower the plunger onto the surface of the gauge block. Check that the indicator reads 0.020-inch. Raise and lower the plunger two more times to check that the dial indicator gives the same measurement in the same spot repeatedly.
How do you align a dial gauge?
To correct horizontal misalignment, follow the steps below:
- Rotate the dial indicators to 9:00 and zero them.
- Rotate both shafts (if possible) to 3:00.
- Adjust the dial indicators to one-half values.
- Move the front feet of the movable machine as you watch the rim indicator move to zero.
How to alignment your dial indicator with the plunger?
Dial Indicator Alignment Basics 1 Dial Indicator Alignment basic 1. The plunger is fully extended out of the case if no pressure is applied to it. 2 Quantifying the sag. 3 Measuring offset using dial indicators. 4 Measuring Angularity With Face Dial Indicators.
How are dial indicators used for shaft alignment?
For shaft alignment, we typically use dial indicators with 0.250″ – 0.300” total travel. The plunger moves a needle clockwise when pushed in and counter clockwise when let out. The face can be rotated so that the needle points to zero. The case is held by a clamp and holding rod which are, in turn, held by a jig or magnetic base.
What should I do if my dial indicator needle moves?
Retighten bolt and make sure the dial indicator needle does not move. Repeat this procedure for the remaining feet. The vertical move is the part of the alignment process that aligns the two shaft’s centerlines into their proper up and down position. Usually you will have to add or remove shims in this step.
What should the SAG be on a dial indicator?
Sag will always have a negative value, so when allowing for sag on the vertical move always start the dial indicator with a plus (+) reading. For example if you have .002″ sag; when you zero your indicators on top put the needle on a +2 instead of zero to compensate for the sag.