PRODUCTS Driving Center Pivot Irrigation

CD-1 Vertical Worm Gear Center Drive

Designed for use with the UMC® C-Face Center Drive Motor

The UMC® CD-1 worm gear center drive is a replacement center drive gearbox for older systems equipped with vertical worm gear center drives.

Part Number Gear Ratio Output RPM
09333-152A 30:1 58 / 48
09333-153A 40:1 43 / 36
09333-151A 50:1 34 / 28
09333-154A 60:1 29 / 24


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The UMC® CD-1 worm gear center drive features 56C frame interface and spider coupler that allows for mounting a C-Face motor to the gearbox.

Features and Benefits

  • Accepts NEMA 56-C face motors with 5/8″ diameter shafts x 2″ long with .19″ key slots
  • 4 gear ratio options (30:1, 40:1, 50:1, and 60:1)
  • Includes shock absorbing motor to gear box spider coupler
  • Precision die cast aluminum housing
  • Oil fill, drain and level plugs for easy maintenance
  • High strength aluminum bronze bull gear
  • Multiple mounting patterns: 5″ x 6″ and 3-3/8″ x 6-3/8”
  • Painted for added corrosion resistance
  • Seals savers on output to protect oil seals