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Belt Drive Visualization

Belt Vibration Signatures

1× Belt Frequency: Belt defect, worn belt, belt/pulley mismatch
2× Belt Frequency: Belt resonance, tension issues
1× Motor: Motor unbalance, pulley runout
1× Driven: Driven equipment unbalance, pulley issues

Speed Ratio 2.00:1

Belt Speed 2749 ft/min

Motor Speed

Motor RPM

1750 RPM

100 RPM Motor Shaft Freq: 29.17 Hz 3600 RPM

Pulley Dimensions

Motor Pulley Diameter Driver pulley

Driven Pulley Diameter Load side pulley

Belt Configuration

Center Distance Distance between shaft centers

Number of Belts For multi-belt drives

Known Belt Length (Optional) Enter if known, otherwise will be calculated

Common Setups

Calculated Frequencies

Motor Shaft

29.17

1.00x motor speed

Motor rotation frequency

Driven Shaft

14.58

0.50x motor speed

Driven equipment frequency

Belt Frequency

8.12

0.28x motor speed

Belt pass frequency

2x: 16.24 | 3x: 24.36 | 4x: 32.48

Belt Length

68.1

inches

Calculated pitch length

Driven RPM

875

RPM

Output shaft speed

Belt/Motor Ratio

3.59

Motor turns per belt revolution

Common Belt Problem Frequencies

Belt Wear/Damage 1× Belt: 8.12 Hz

Belt Resonance 2× Belt: 16.24 Hz

Motor Pulley Runout 1× Motor: 29.17 Hz

Driven Pulley Runout 1× Driven: 14.58 Hz

Belt Tension (Loose) Sub-harmonics of belt freq

Pulley Misalignment 1× & 2× shaft frequencies + axial

Belt Frequency Calculator

Belt Vibration Signatures