## What is reverse alignment method?

Reverse alignment is the measurement of the axis, or centerline, of one shaft to the relative position of the axis of an opposing shaft centerline. The centerline measurements are taken in both horizontal and vertical planes (Figure 1).

## How do you calculate alignment reading?

Calculating the Front Feet and Rear Feet Positions

1. Face TIR = Total Indicator Reading from the Face Dial.
2. Rim TIR = Total Indicator Reading from the Rim Dial.
3. A = the diameter of the face dial indicator travel.
4. B = the distance from the Rim dial indicator plunger to the movable machine’s front feet bolt center.

What is the methods of alignment?

The three primary methods of producing pairwise alignments are dot-matrix methods, dynamic programming, and word methods; however, multiple sequence alignment techniques can also align pairs of sequences.

### What is radial and axial alignment?

Radial (offset or parallel) misalignment. The centrelines of the two shafts are parallel but offset. Axial (or end float) misalignment. The two shafts are aligned but one (or both) axles are prone to in/out movement along the centreline.

### What is TIR measurement?

Total Indicator Reading (TIR) measures roundness in relationship to a center line. TIR is expressed in total diametric deviation. Example: ±0.004 (0.10mm) deviation is defined as 0.008 (0.20mm) TIR.

What is TIR in shaft alignment?

Total indicator runout, or TIR, is a term often used in manufacturing, especially when dealing with rotating parts. TIR is simply the difference between the maximum and minimum values measured across an entire rotating surface about a reference axis.

#### What is gap and sag?

– Gap and sag method – The procedure of verification of the alignment condition prior to shafting assembly. Sag and gap is verified between mating flanges and has to comply with the appropriate, analytically obtained values. Sag and gap procedure should be conducted in the dry dock.