When customizing concrete mixer trucks, how to specify acceptance criteria for OEM drum volume and mixing blade angle?
• Drum effective volume per JIS or DIN; mixing volume must be ≥55% of geometric volume.
• Blade helix angle typically 12°-16°; deviation over 1° harms discharge uniformity.
• Require blade wear thickness allowance, no less than 70% of original.
• Agree discharge residual rate ≤1%, verify with slump cone on site.
• Drum material Q345B, thickness ≥5mm, provide mill certificate.
• Blade helix angle typically 12°-16°; deviation over 1° harms discharge uniformity.
• Require blade wear thickness allowance, no less than 70% of original.
• Agree discharge residual rate ≤1%, verify with slump cone on site.
• Drum material Q345B, thickness ≥5mm, provide mill certificate.