Shaft Alignment Pdf

What is coupling alignment?

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• Coupling alignment is shaft alignment. If the shafts are aligned, the couplings will normally go along for the ride.

Types of Couplings

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• Rigid – usually must be aligned to very close tolerances. Think of it as solidly bolting one shaft to another.

• Flexible – uses one or more elements to connect the shafts.

• Mechanical Elastomeric Metallic These can tolerate slightly more misalignment, thermal changes, and shock.

Co-linearity

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• Shafts in this same straight line are considered co-linear, or in the same straight line.

Types of Misalignment

• Offset, or Parallel – the shafts are parallel to each other, but are not co-planar, or in the same plane. This can be both vertical and horizontal.

• Angular – the shafts are not in the same plane, which causes a difference in measurement between measurements made 180 degrees opposite on the coupling faces.

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