Housing vibration

Capture machine condition simply and economically

Casing vibrations show how bearings, gears, housing, and foundation behave during operation.
Robust acceleration and velocity sensors allow for reliable and cost-effective monitoring of general machine condition.

Robust, proven – but not everything is visible

Casing vibrations capture external movement – on the bearing housing, foundation, or the machine itself.

Typical measured quantities are:

• Vibration velocity (Standard for condition monitoring)
• Vibration acceleration (for high-frequency excitations)

The measurement is easy to install, maintenance-friendly, and sufficient for many applications.

Recognize condition – correctly classify causes

Casing vibration measurement can identify typical problems:

• Unbalance
• Misalignment
• Looseness
• Bearing problems (indirect)
• Excitations from gears or rolling bearings

Important:
Many of these disturbances originate in the rotor – and are there more directly and earlier visible via shaft vibration.

Casing vibration often only shows what is already being transmitted externally.

Economically viable – with clear limitations

Casing vibration measurement is ideal for:

• smaller and medium-sized machines
• Pumps, blowers, fans, electric motors
• rolling element bearing systems

It is:

• cost-effective
• easy to retrofit
• robust in operation

But crucial in practice:

• Installation quality significantly affects the result
• Signal transmission from the rotor to the casing is not always reliable
• Misinterpretations due to unfavorable installation situations are common

Especially for high-performance machines with plain bearings, this measurement alone is often not sufficient.