Product Overview:
Introducing a new gearbox from AndyMark, the "TB3"!  This is a THREE stage Toughbox, with an much larger overall ratio compared to the standard Toughbox.  We added another stage, using a 60-tooth, 32 dp gear riding on a 3/8" hex shaft.  This gear can be driven by a 15 tooth pinion gear on a CIM Motor, or a 15 tooth pinion gear on a smaller, 500-series motor like the Fisher-Price motor.  This additional stage provides a standard ratio of 51:1.  After the additional stage, the same standard Toughbox gears are used within the TB3.  This means that some of the optional Toughbox gears can be used within the TB3, so that overall reductions of 43:1, 34:1, and 24:1 can be attained.

This gearbox is designed for having two 500-series motors (aka: Fisher-Price motor), OR one CIM motor inputs.

Note: This gearbox ships as an unassembled kit of parts.

Specifications:

• Weight:  2.75 pounds (without motor(s))
• Input: One CIM motor OR (one or two Fisher Price motors)
  
• Output: 1/2" Shaft keyed
  
• Reduction Ratio: 51:1
• Gear Material: Steel

Included Hardware:

• One - Motor Plate
• One - Shaft Plate
  
• One - 50t 20dp Large Output Gear
• Two - 14t 20dp Small Cluster Gears
• One - 50t 20dp Large Cluster Gear
• Two - 15t 32dp Sun Gear (used for Fisher Price mounting)
• Four - M3x10mm SHCS Screws (used for Fisher Price mounting)
  
• One - 15t 32dp CIM Sun Gear (used for CIM motor mounting)
• Four - 10-32 x 5/8" SHCS (used for CIM motor mounting)
  
• One - 60t 32dp Output Gear
  
• Five - 3/8" id flanged Ball Bearings
• One - 1/2" id flanged Ball Bearing
  
• Four - 1/4-20 Nylock Nuts
• Four - 1/4-20 x 2 SHCS
  
• One - Toughbox Housing Enclosure
  
• One - External Klipring for 1/2" shaft
• Two - Toughbox Small Hex Shafts
• One - Toughbox Output Shaft
• One - Nylon Spacer
  

• TB3 Assembly Instructions (.pdf)
• TB3 Exploded View (.pdf)