AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 21.72:1 Ratio 2:1, StageB 3 - 32.74:1 Ratio 2:1

• AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 21.72:1 Ratio 2:1, StageB 3 - 32.74:1 Ratio 2:1
• Incorporates a refined 4-tooth dog shifting mechanism
• Compatible with two CIM or NEO motors
• Utilizes high-strength AMPCO® 18 Bronze dog gear
• Features pneumatic shift for seamless operation
• Mounts to AM14U chassis or 2"x1" box tube frame

The AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 21.72:1 Ratio 2:1, StageB 3 - 32.74:1 Ratio 2:1 represents a significant advancement in shifting transmission gearboxes. This two-speed, shift-on-the-fly gearbox incorporates a refined 4-tooth dog shifting mechanism, allowing for seamless transitions between speeds. It is compatible with two CIM or NEO motors and can be configured with either two or three interior stages, offering flexibility in output shaft selection. The gearbox is delivered assembled, though motors are not pre-installed.

This model introduces several enhancements over previous iterations, including a more robust dog gear with four dogs per face, constructed from AMPCO® 18 Bronze for improved strength and lubricity. The shift block assembly has been fortified with a larger bearing and threaded steel housing. The input stage features 32 DP gears and a 15-tooth pinion gear, facilitating a high first stage reduction. Users have the autonomy to select their preferred high and low ratios, with the ability to interchange them as needed. Additional encoder options are available, enhancing the gearbox's adaptability.

The EVO Shifter employs a pneumatic shift method, utilizing a spring-extend pneumatic cylinder for shifting. This mechanism allows for shifting during various states of motion, ensuring continued operation even if air pressure is lost. The gearbox is designed for easy assembly and disassembly, with features that ensure correct gear orientation. It can be mounted to an AM14U family chassis or a 2"x1" box tube frame using existing mounting plate holes.

Note: Proper greasing is essential for optimal performance and longevity of the gearbox. It is recommended to run the gearbox for 30 minutes without grease for initial wear-in, followed by periodic application of grease to the spur gears.