Description: The drive is mounted on a stationary center pier. The rotating portion of the drive turns a structural torque cage, which in turn rotates the sludge removal mechanism. The drive also supports the walkway and center platform.

Advantages:
• Maintains more rigid rake arm support mechanism
• Can handle extreme torque conditions
• Bridge has shorter unsupported span and is less expensive in units over 40 feet in diameter
• Center column doubles as a walkway support and feed pipe
• Lifting device option allows for inconsistent sludge loadings

Applications:
• Generally used in municipal thickener applications 40 foot diameter or larger,
  or in extreme torque industrial applications.