The Anderon is a unit of bearing vibration equal to 1 μm/s RMS velocity. It was developed by the bearing industry (named after the Anderson meter) to quantify rolling element bearing vibration during manufacturing quality checks at a standard speed of 1800 RPM.

ISO 15242 defines methods for measuring vibration of rolling bearings. It specifies three frequency bands: Low (50–300 Hz), Medium (300–1800 Hz), and High (1800–10000 Hz). Each band captures different defect types. ISO 15242 defines the measurement method only — it does not specify acceptance limits.

What do the frequency bands represent?

Low band (50–300 Hz): waviness of raceways. Medium band (300–1800 Hz): surface roughness and minor defects. High band (1800–10000 Hz): micro-defects, contamination, and noise. Acceptance limits for each band are set by the bearing manufacturer or agreed between manufacturer and customer — ISO 15242 does not specify them.

How do I convert μm/s to Anderon?

1 Anderon = 1 μm/s RMS velocity. So the conversion is direct: a measurement of 50 μm/s = 50 Anderon. The measurement is typically performed at 1800 RPM inner ring rotation with outer ring fixed.

What are typical Anderon limits for good bearings?

For ABEC-1 (P0) bearings: Low band < 50 And, Medium < 40 And, High < 35 And. For ABEC-5 (P5): Low < 25 And, Medium < 20 And, High < 15 And. Precision grades have even tighter limits. These are representative industry values, not ISO 15242 limits — always check the bearing manufacturer's acceptance specification for the exact bearing type and size.

नि:शुल्क अभियांत्रिकी साधन — #030

Bearing Vibration Anderon Calculator

Convert bearing vibration measurements to Anderon units using the ISO 15242 measurement bands. Enter measured vibration velocity for each frequency band and bearing grade to assess quality.

ISO 15242Anderon unitsABEC ग्रेड्स

Results

एकूण मूल्यांकन

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कमी पट्टा

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मध्यम पट्टा

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उच्च पट्टा

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एकूण (RSS)

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Anderon unit

मानक वेगावर मोजलेले (सामान्यतः 1800 RPM inner ring rotation, outer ring stationary).

ISO 15242 वारंवारता पट्टे

पट्टा	वारंवारता श्रेणी	दोष प्रकार
कमी	50–300 Hz	तरंगता, गोलाकारतेबाहेर
मध्यम	300–1800 Hz	पृष्ठभाग खरखरीतपणा, किरकोळ दोष
उच्च	1800–10000 Hz	सूक्ष्म दोष, दूषण

Representative Anderon Limits (Industry Practice)

ग्रेड	कमी	मध्यम	उच्च
ABEC-1 (P0)	≤ 50	≤ 40	≤ 35
ABEC-3 (P6)	≤ 35	≤ 30	≤ 25
ABEC-5 (P5)	≤ 25	≤ 20	≤ 15
ABEC-7 (P4)	≤ 15	≤ 12	≤ 10
ABEC-9 (P2)	≤ 10	≤ 8	≤ 6

ℹ️ टीप: ISO 15242 defines the measurement method and frequency bands only — it does not set acceptance limits. The values above are representative, manufacturer-style guidance; per ISO 15242, acceptance limits are agreed between the manufacturer and the customer. Always consult the bearing manufacturer’s acceptance specifications for your exact bearing type and size.