AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 18.71:1 Ratio 1.14:1, StageB 3 - 12.41:1 Ratio 1.14:1

• AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 18.71:1 Ratio 1.14:1, StageB 3 - 12.41:1 Ratio 1.14:1
• Advances with a two-speed shift-on-the-fly gearbox
• Incorporates a robust 4-tooth dog shifting mechanism
• Supports two CIM or NEO motors and various output shafts
• Features easy assembly and disassembly
• Offers optional third stage for additional ratio choices

The AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 18.71:1 Ratio 1.14:1, StageB 3 - 12.41:1 Ratio 1.14:1 represents a significant advancement in shifting transmission gearboxes. This two-speed, shift-on-the-fly gearbox incorporates an enhanced 4-tooth dog shifting mechanism, allowing for seamless transitions between gears. 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.

The EVO Shifter introduces several improvements over previous models, including a more robust dog gear with four dogs on each face, constructed from AMPCO® 18 Bronze for increased strength and lubricity. The shift block assembly has been reinforced with a larger bearing and threaded steel housing. The input stage utilizes 32 DP gears and a 15-tooth pinion gear, achieving a high first stage reduction of 85:15. Users can independently select high and low gear ratios, and the gearbox supports additional encoder options, enhancing its adaptability.

The gearbox features aggressive weight reduction techniques and is designed for easy assembly and disassembly without concern for gear orientation. An optional third stage provides further ratio choices, and the gearbox can be mounted to various chassis configurations using existing mounting plate holes. The pneumatic shift method employs a spring-extend pneumatic cylinder, enabling gear shifts even during acceleration or deceleration.

Note: Proper greasing is essential for optimal operation and longevity of the gearbox. It is recommended to run the gearbox for a short period without grease to allow for gear wear-in before applying grease periodically.