AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 08.63:1 Ratio 1.14:1, StageB 3 - 06.86:1 Ratio 1.14:1

• AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 08.63:1 Ratio 1.14:1, StageB 3 - 06.86:1 Ratio 1.14:1
• Features shift-on-the-fly gearbox
• Incorporates improved 4-tooth dog shifting
• Supports two CIM or NEO motors
• Offers high 85:15 first stage reduction
• Allows independent high and low ratio selection

The AndyMark EVO Shifter Short Hex Shaft, StageA 3 - 08.63:1 Ratio 1.14:1, StageB 3 - 06.86:1 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 method, allowing for smooth and efficient 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 performance. The gearbox is shipped assembled, though motors are not 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 strength and lubricity. The shift block assembly is reinforced with a larger bearing and threaded steel housing, enhancing durability. 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 ratios, and the gearbox supports various encoder options, including the US Digital E4T.

The gearbox is designed with aggressive weight reduction features and allows for easy disassembly and reassembly without concern for gear orientation. It can be mounted to an AM14U family chassis or a 2"x1" box tube frame using existing mounting plate holes. The pneumatic shift method employs a spring-extend pneumatic cylinder, enabling shifts even during acceleration or deceleration.

Note: Ensure proper greasing and break-in procedures are followed for optimal performance and longevity.