ToughBox Mini S


Selected Product Code: TB2C2XLX

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The best gets better! The ToughBox Mini, a staple of single-speed gearboxes, has improved! Say hello to the ToughBox Mini, now, with an S. The features everyone needs are here to stay; the dro...Read More

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Product Overview

The best gets better! The ToughBox Mini, a staple of single-speed gearboxes, has improved! Say hello to the ToughBox Mini, now, with an S.

The features everyone needs are here to stay; the drop-in option for the AM14U drive bases accept NEO and CIM-style Motors. "What has changed?", you ask. For starters, gears are now symmetrical. You will no longer need to ensure gears are installed in the correct orientation! Secondarily, pocketed gears are now an off-the-shelf option for you to choose when saving weight is a priority. If you have gear stock on hand and want to save money, you can order with output gears excluded. 

Like many gearboxes we offer, the ToughBox Mini S can be ordered with your plate, ratio, and shaft of choice based on your needs. If you want the ToughBox Mini as it was, now called ToughBox Mini Classic, will still around while supplies last.

Components Included with All ToughBox Mini S Gearboxes:

  • 1 - 3/8 in. Round Shielded Bearing (R6ZZ) (am-0028)
  • 1 - Toughbox Series 0.375 in. Hex Cluster Shaft (am-0152)
  • 1 - 1/2 in. E-Clip (am-0206)
  • 2 - 3/8 in. ID Shielded Bearing (R6ZZ) (am-0516)
  • 1 - ToughBox Mini Housing (am-0650)
  • 1 - 1/4" Flat Washer Steel (am-1027)
  • 1 - Screw, BHCS 1/4-20 x 1/2" Zinc (am-1039)
  • 4 - 10-32 Nylock Nut (am-1042)
  • 4 - 10-32 x 3/4 in. Long Socket Head Cap Screw (am-1047)
  • 1 - Dowel Pin, 1/4" dia x 1.00" long, Steel (am-1323)
  • 1 - Red Tacky Grease, 14.2 gram (am-2768)
  • 1 - 1/2 in. Hex Shielded Flanged Bearing (FR8ZZ-HexHD) (am-2986)
  • 1 - SRX Encoder Cylinder Magnet (am-3505)

Version-Specific Components

Motor Hardware:

    • 2 - 8 mm Push On Retaining Ring (am-0033)
    • 2 - 14 Tooth 20 DP 8 mm Round Bore Steel Pinion Gear (am-0034)
    • 4 - 5/16" Flat Washer (am-1009)
    • 4 - Screw, SHCS 10-32 x 5/8" w/ Nylon Thread Lock Patch (am-1120)
    • 2 - 2 mm x 10 mm Machine Key Steel (am-1121)
  • Falcon 500
    • 2 - 8-32 x 0.5 In. Button Head Cap Screw with Thread Locking (am-1537)
    • 4 - 10-32 x 0.5 in. Socket Head Cap Screw with Nylon Patch (am-1542)
    • 2 - 14 Tooth 20 DP Falcon Spline Bore Steel Pinion Gear (am-4147)

Gear Options:

  • Standard
    • All gears are 20 DP 4140 Steel, Zinc Plated, and contain symmetrical features.
  • Weight Relief 
    • Gears are pocketed where possible. The material properties are the same as standard gears. Some gears are too small to reasonably pocket. This includes;
      • 3/8 in. hex bore gears between 25 and 52 tooth.
      • 1/2 in. hex bore gears between 30 and 56 tooth.
  • Exclusions
    • To save money, if you already have gears for the ratios desired, you can elect to receive only the gears you need.

Shaft Options:

All shafts are made of Steel; 1018, 1215, or 12L14, and zinc plated for rust prevention. For speed and distance measurements, all shafts are machined with a socket to accept a steel dowl or magnet for various encoders. The AM14U shaft has this feature at both ends.

  • Long
    • Length: 5.6 inches long.
    • Usage: For large drive rail spans or when multiple motion components must be driven, this extra-long shaft is a great choice.
  • Short
    • Length: 3.6 inches long.
    • Usage: Great for driving individual motion components such as a hub or pulley. Supporting the output shaft end with a bearing is not always needed.
  • AM14U
    • Length: 5.1 inches long.
    • Usage: This shaft should be used when installing a ToughBox Mini S in an AM14U drive base. The length is designed to be perfectly supported on the output shaft end.

Plate Options:

  • Flat: For face mounting a ToughBox Mini S to various structures or members wherever you need it to live! It also keeps the insides from falling out.
  • Angled: When you want to secure the ToughBox Mini S to a flat component face like 2x1 box tube.
  • None: Use this option if you wish to secure the ToughBox Mini S straight to your own flat plate. We do this on the AM14U!

Break-in Period:

All AndyMark gearboxes require grease for proper operation and long life. Grease is included with your gearbox, so please use it. We encourage you to power the gearbox continuously for 30 minutes without grease to allow the gear teeth to wear in. We design with short run times in mind, this 'run in' period for smooth gearbox operation is recommended. Once completed, thoroughly grease the gear teeth periodically to ensure smooth operation.


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  • Motor Input: CIM, NEO, Falcon 500
  • Motor Quantity: 1, 2
  • Ratio: 5.95:1, 7.31:1, 8.46:1, 9.13:1, 10.71:1, 12.76:1


Returns are accepted within 30 days of purchase.
View our return policy here.


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