AM14U6 - 6 Wheel Drop Center Robot Drive Base - 2025 FRC Kit of Parts Drive Base

This is the "AM" - "ONE" - "FOR" - "YOU"!

The perfect base for prototyping robotic applications as well as being part of the final design! This large format, infinitely configurable drive platform was designed to be built with performance in mind. The AM14U6 drive chassis has three main configurations (Long, Square & Wide) as starting options. The drop center wheel allows for smoother turning ability, while maintaining stability. This is the 6th generation of this popular chassis now includes "on grid" #10 clearance holes that make it much easier to interface popular upper structure options such as pre-drilled tubing and gussets. 

This product ships as an un-assembled kit. It features HiGrip Wheels, Toughbox Mini S Gearboxes, and HTD Belts.

Assembly and cutting of aluminum is required. See the Assembly Videos.

If this chassis is being used for the FIRST Robotics Competition, please consider the robot perimeter rules and size this chassis accordingly. The manual helps clearly show where to make cuts for different sizes, you can adapt your cuts to fit as needed.

Gear Ratio:

In the 2025 FIRST® Robotics Competition the KOP Chassis has 8.46:1 Gear Ratio. On this page you can select all possible gear ratios. If you would like to know more about gear ratios and how they affect your robot, watch our How Do I Change Motor Speed and Torque? video.

Various Configurations:

Built on the same great features of previous AM14U family chassis, this can be configured into many different perimeter, wheel, and gearbox configurations. There are literally thousands of possible playing configurations.

• Smallest Frame size: 24.3 in. x 27 in.
• Largest Frame size: 32.3 in. x 31 in.

It is shipped as a Kit with plates that can build in a large square configuration. This makes it the largest possible size and allows for the user to trim the length and width of the chassis to become a long, wide, or a smaller square to fit different the size constraints of each specific year. The assembly instructions show how it can be changed, be sure to check out the assembly videos as well.

Encoder Options:

The AM14U6 does not include encoders. The included Toughbox Mini S Gearboxes ship with an output shaft that has holes in the ends for optional included 1/4" diameter steel dowels (am-1323) that are compatible with the US Digital E4T Encoder (am-3132) and the REV Through Bore Encoder (am-4650). Teams also have the option of purchasing a magnetic dowel (am-3505) to replace the steel dowel allowing the use of the SRX Magnetic Encoder (am-3445). In order to use this encoder on the Toughbox Mini S, our SRX Magnetic Encoder Mounting Hardware Kit (am-3565) must also be used to mount each encoder.

Control Options:

To control this drive, you will need a power and control system like the Electronic Bundles kit, roboRIO, Spark Max, 4 CIM motors, and PDP (BCRX4CP). Many options are available!

The chassis requires a minimum of two CIM style motors (am-0255), but we recommend four CIMs to be competitive in situations like heavy robots, high traction, and pushing match situations that put a lot of load on the motors. You will also need at least one battery. We recommend the 2 Pack of MK Batteries (am-0844), and the 3 Bank SB50 NOCO Battery Charger (am-4968_3). There are many options available here as well.

Included Items:

What comes in the 34x7x7 in. box:

• 2 - 3/8" Round Shielded Bearing (FR6ZZ) (am-0028)
• 2 - 1/2" Round Flanged Shielded Bearing (FR8ZZ) (am-0030)
• 4 - 8mm Push On Retaining Ring (am-0033)
• 4 - 14 Tooth 20 DP 8mm Round Bore Steel Pinion Gear (am-0034)
• 2 - Toughbox Series 0.375" Hex Cluster Shaft (am-0152)
• 2 - 1/2" E-Clip (am-0206)
• 8 - 3/8" Round Shielded Bearing (1614ZZ) (am-0209)
• 4 - 3/8" ID Shielded Bearing (R6ZZ) (am-0516)
• 2 - Toughbox Mini Housing (am-0650)
• 6 - 6" HiGrip Wheel, 80A Durometer (am-0940b)
• 24 - Screw, SHCS 10-32 x 1/2" (am-1002)
• 8 - 8mm Hardened Flat Washer (am-1009a)
• 2 - 1/4" Flat Washer Steel (am-1027)
• 2 - Screw, BHCS 1/4-20 x 1/2" Zinc (am-1039)
  
• 32 - 10-32 Nylock Nut (am-1042)
• 8 - 10-32 x 3/4 in. Long Socket Head Cap Screw (am-1047)
• 4 - 3/8-16 Nylock Nut (am-1054)
• 8 - Screw, SHCS 10-32 x 5/8" w/ Nylon Thread Lock Patch (am-1120)
• 4 - 2mm x 10mm Machine Key Steel  (am-1121)
• 4 - 3/8-16 x 4.25" Hex Head Bolt Grade 5 (am-1297)
• 2 - 0.57" ID, 0.505" OD, 1.125"  Long Hex Spacer Plastic (am-1305)
• 4 - 0.28" ID, 0.382" OD, 0.518"  Long Spacer Plastic (am-1306)
• 4 - 0.850" ID, 0.380" OD, 0.75" Long Spacer (am-1307)
• 20 - 1/4-20 x 0.75" Self Tapping Hex Washer Head Screw (am-1310)
• 2 - Dowel Pin, 1/4" dia, 1.00" Long, Steel (am-1323)
• 50 - 10-12 x 1.5" Self Piercing Hex Head Cap Screw (am-1654)
• 16 - Pulley, Half, 42 Tooth, HTD, 15mm Wide, Polycarbonate (am-2234a)
• 4 - 160 Tooth 5mm, 15mm Wide Timing Gates Belt 8005M15 (am-2266)
• 2 - 500EX Hex Hub (am-2568)
• 4 - 131 Tooth 5mm 15mm Wide Timing Gates Belt (am-2571)
• 4 - 120 Tooth 5mm 15mm Wide Timing Gates Belt (am-2704)
• 2 - Red Tacky Grease, 14.2 gram (am-2768)
• 2 - 1/2" Hex Shielded Flanged Bearing (FR8ZZ-HexHD) (am-2986)
• 2 - AM14U4 End Plate (am-3920)
• 2 - AM14U6 Outside Plate (am-3921b)
• 2 - AM14U6 Inside Plate (am-3922b)
• 2 - 16 Tooth 20 DP 0.375 in. Hex Bore Steel Gear (am-4665)
• 2 - 48 Tooth 20 DP 0.5 in. Hex Bore Steel Gear (am-4714)
  
• 2 - 50 Tooth 20 DP 0.375" Hex Bore Steel Gear (am-4720)
• 12 - Churro, 3.375" Long (am-2569)
• 2 - Churro, 24 in. Long (am-3101-2)
• 2 - ToughBox S Series Hex Output Shaft, AM14U Length, not plated (am-4722)

NOTE: This chassis DOES NOT include the following as there are many options for each case:

• CIM motors (am-0255) or NEO Motors (am-4258)
• Bumper Hardware Mount Kit (am-3966)  Recommended method for Bumper mounting to this chassis
• Vertical Battery Mount Kit (am-3964a) Recommended method for Battery mounting to this chassis.

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