Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 15.11:1 Ratio 2:1, StageB 3 – 12.00:1 Ratio 2:1
- Features two-speed, shift-on-the-fly transmission
- Utilizes improved 4-tooth dog shifting method
- Compatible with CIM or NEO motor systems
- Employs pneumatic shift with spring-extend cylinder
- Includes US Digital E4T encoder for precision
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 15.11:1 Ratio 2:1, StageB 3 – 12.00:1 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 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.
Significant improvements have been made over previous models, including the use of AMPCO 18 Bronze for the dog gear, which enhances strength and lubricity. The gearbox features a robust shift block assembly with a larger bearing and threaded steel housing, contributing to its durability. The input stage utilizes 32 DP gears and a 15-tooth pinion gear, providing a high first stage reduction. Users have the ability to independently select high and low ratios, allowing for customizable performance.
The EVO Shifter employs a pneumatic shift method, utilizing a spring-extend pneumatic cylinder that enables shifting even during acceleration or deceleration. This feature ensures continued operation in the event of air pressure loss. 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. It includes a US Digital E4T encoder, enhancing its functionality.
Note: All AndyMark gearboxes require proper greasing for optimal 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.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 15.11:1 Ratio 2:1, StageB 3 – 12.00:1 Ratio 2:1
- Shielded, flanged ball bearings
- 1117 steel 32 DP gears, with 20-degree pressure angle (1st stage)
- 4140 steel 20 DP gears, with 14.5-degree pressure angle (2nd and 3rd stage)
- 1/4″ thick aluminum side plates, pocketed
- US Digital encoder and pneumatic cylinder included
- 4140 steel output shafts
- 1x Red Tacky Grease, 14.2 gram
- Various spacers, bearings, and hardware for assembly
Specifications
- Two-speed, shift-on-the-fly gearbox
- Enhanced 4-tooth dog shifting method
- Compatible with two CIM or NEO motors
- Configurable with two or three internal stages
- Selection of various 1/2 inch output shafts
- Plates designed for mounting two motors
- Shipped assembled without motors
- Pneumatic shift method with spring-extend pneumatic cylinder
- Weight without motors: Three Stage: 3.5 pounds
- Encoder ratio: 3:1 for two-stage versions
- Includes US Digital E4T encoder
- Features aggressive weight reduction
- Mountable to an AM14U family chassis or a 2″x1″ box tube frame
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