AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 21.72:1 Ratio 2:1, StageB 3 - 09.54:1 Ratio 2:1

• AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 21.72:1 Ratio 2:1, StageB 3 - 09.54:1 Ratio 2:1
• Advances with two-speed shift-on-the-fly capability
• Utilizes improved 4-tooth dog shifting method
• Accommodates two CIM or NEO motor inputs
• Employs robust AMPCO 18 Bronze dog gear
• Supports various encoder and mounting options

The AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 21.72:1 Ratio 2:1, StageB 3 - 09.54:1 Ratio 2:1 represents a significant advancement in shifting transmission gearboxes. This two-speed, shift-on-the-fly gearbox is designed with an improved 4-tooth dog shifting method, allowing for smooth and efficient transitions between gears. It accommodates motor inputs from two CIM or NEO motors and can be configured with either two or three interior stages, offering flexibility in performance. The gearbox is shipped assembled, though motors are not installed.

Significant enhancements have been made to the EVO Shifter, including a robust 1/8" diameter shoulder screw and a dog gear made from AMPCO® 18 Bronze, which provides added strength and lubricity. The shift block assembly is reinforced with a larger bearing and threaded steel housing. The input stage features 32 DP gears and a 15-tooth pinion gear, achieving a high first stage reduction of 85:15. Users have the ability to independently select high and low ratios, and the gearbox supports various encoder options, enhancing its adaptability.

The EVO Shifter employs a pneumatic shift method, utilizing a spring-extend pneumatic cylinder that allows for shifting even during acceleration or deceleration. The gearbox is designed with aggressive weight reduction features and can be mounted to an AM14U family chassis or a 2"x1" box tube frame using existing mounting plate holes. The optional third stage provides additional ratio choices, further expanding its versatility.

Note: Proper greasing is essential for optimal operation and longevity of the gearbox. It is recommended to run the gearbox for a break-in period before applying grease to ensure smooth operation.