AndyMark EVO Shifter am14u Family Shaft, StageA 3 Stage - 15.11:1 Ratio 2:1, StageB 3 Stage - 12.00:1 Ratio 2:1

• AndyMark EVO Shifter am14u Family Shaft, StageA 3 Stage - 15.11:1 Ratio 2:1, StageB 3 Stage - 12.00:1 Ratio 2:1
• Features two-speed shift-on-the-fly operation
• Incorporates rugged AMPCO 18 Bronze dog gear
• Offers flexible motor and output configurations
• Utilizes advanced pneumatic shift method
• Includes aggressive weight reduction features

The AndyMark EVO Shifter am14u Family Shaft, StageA 3 Stage - 15.11:1 Ratio 2:1, StageB 3 Stage - 12.00:1 Ratio 2:1 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 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.

The EVO Shifter features several improvements over previous models, including a robust 1/8" diameter shoulder screw and a dog gear made from AMPCO® 18 Bronze, which provides added lubricity for smoother shifting. The shift block assembly is reinforced with a larger bearing and threaded steel housing, enhancing durability. The input stage employs 32 DP gears and a 15-tooth pinion gear, achieving a high 85:15 first stage reduction. Users can independently select high and low ratios, with the option to swap ratios as needed. Additional encoder options are available, and the gearbox includes aggressive weight reduction features for optimized performance.

The gearbox utilizes a pneumatic shift method powered by a spring-extend pneumatic cylinder, enabling shifts during acceleration, pushing, or deceleration. It is designed to be mounted on an AM14U family chassis or a 2"x1" box tube frame using existing mounting plate holes. The gearbox's weight ranges from 2.9 to 3.5 pounds, depending on the stage configuration.

Note: Proper greasing is essential for the gearbox's operation and longevity. It is recommended to run the gearbox for 30 minutes without grease for initial wear-in before applying grease to the spur gears periodically.