BETONPARTSDiagnosis sheet · https://betonparts.com/en/faults/twin-shaft/knock/
Twin-shaft mixer · Noise and vibration
Rhythmic metallic knock, once per turn
- Symptom
- Rhythmic metallic knock, once per turn
- Likely cause
- Loose arm bolts or a broken paddle.
- Check
- Inspect arms and paddles (locked out).
- Fix
- Retighten to torque; replace the broken paddle.
Manual · Book 1 · § 12.2
Parts you may need
⚠ Every look inside, turn by hand or open step means full lockout first. Never enter a silo or a bin with material in it.
Plant / site
Machine and serial no.
Date
Checked by
Findings and actions
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