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Nano Tube 31, Left, Three 1/2 in. Key Shafts, 25 Chain Drive (am-0689L)
Nano Tube 31, Left, Three 1/2 in. Key Shafts, 25 Chain Drive (am-0689L)
Price: $286.00

Stock Status:(Out of Stock)

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Product Usage:
All AndyMark gearboxes require grease for proper operation and long life. We suggest using our red tacky grease, am-2768. We also encourage that the user powers the gearbox continuously for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'run in' period for smooth gearbox operation, is recommended. Once this is completed, thoroughly grease the gear teeth periodically to ensure smooth operation.

Product Overview:
This 31-inch-long Nano Tube houses two complete gearboxes, each having the same gearing and shafts as the Nano with 500 Key Shaft. This unit also has a third central shaft, which is dropped by 0.13 inch compared to the end shafts. This central shaft is driven by a 25-series chain from one of the end drive shafts. Nano Tube accepts two 2.5 inch CIM Motors. Hardware is included for attaching this motor.

This product is intended to be used as a complete drive module for the side of a 6-wheel-drive robot. A second tube is to be used on the opposite side of the robot in order to make the complete drive chassis. Version: 3-shaft, 500 Key, Chain Drive

Specifications for each Gearbox:
  • Overall Ratio: 12.75:1 (standard)
  • Gear material: 4140 steel
  • Gear type: spur gears, 20 dp, 14.5 degree pressure angle
  • Body extrusion material: 6061 aluminum
  • Output shaft: 1/2 inch diameter, 4140 steel with 1/8" keyway
  • Input Gear: CIM Gear, 14 tooth, 0.315 inch bore w/ 2mm keyway
  • Large Cluster Gear: 50 tooth, 3/8 inch hex bore
  • Small Cluster Gear: 14 tooth, 3/8 inch hex bore
  • Large Output Gear: 50 tooth, 1/2 inch hex bore
Weight: 5.4 pounds, not including motors and encoders

Optional Gear Ratios:

Ratio CIM Gear Lg. Cluster Gear Sm. Cluster Gear Lg. Output Gear
10.71:1 14 tooth 50 tooth 16 tooth 48 tooth
8.45:1 14 tooth 50 tooth 19 tooth 45 tooth
5.95:1 14 tooth 50 tooth 24 tooth 40 tooth

Weight Reduction with Optional Parts:
Aluminum Large Cluster Gear can replace the standard steel 50 Tooth Large Cluster Gear.
Aluminum Large Output Gear can replace the standard steel 50 Tooth Large Output Gear.

Additional Encoder:
An optional Encoder Package can be purchased and added to this Toughbox. If you already have a US Digital Encoder to fit this Toughbox, this Encoder Mount Pad will help you mount the encoder to the Toughbox. Here is a guide for encoder installation and alignment.

Aluminum Hex Output Shafts:
The Toughbox Nano Tube can use an optional Short 1/2" Hex Aluminum Output Shaft with Magnet for Toughbox® Series (am-am-0397a) as a separate purchase but a FR8ZZ-Hex bearing MUST also be ordered SEPARATELY to replace the FR8ZZ bearing supporting each output shaft. Also, the sprockets must be swapped out for 1/2" hex bore sprockets.

Chain and Sprocket Specifications: Made in the USA:
Bearings, chain and screws were not made in the USA. All other components were designed, manufactured and assembled in the United States of America.

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