Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 21.72:1 Ratio 2:1, StageB 3 – 09.54:1 Ratio 2:1
- Advances with two-speed shift-on-the-fly capability
- Utilizes improved 4-tooth dog shifting method
- Accommodates two CIM or NEO motor inputs
- Employs robust AMPCO 18 Bronze dog gear
- Supports various encoder and mounting options
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 21.72:1 Ratio 2:1, StageB 3 – 09.54:1 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 accommodates motor inputs from 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 enhancements have been made to the EVO Shifter, 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. The input stage features 32 DP gears and a 15-tooth pinion gear, achieving a high first stage reduction of 85:15. Users have the ability to independently select high and low ratios, and the gearbox supports various encoder options, enhancing its adaptability.
The EVO Shifter employs a pneumatic shift method, utilizing a spring-extend pneumatic cylinder that allows for shifting even during acceleration or deceleration. 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 using existing mounting plate holes. The optional third stage provides additional ratio choices, further expanding its versatility.
Note: Proper greasing is essential for optimal operation and longevity of the gearbox. It is recommended to run the gearbox for a break-in period before applying grease to ensure smooth operation.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 21.72:1 Ratio 2:1, StageB 3 – 09.54:1 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
- Individual hardware within two-stage assembly
- 1x Red Tacky Grease, 14.2 gram
- 1x Encoder Mount Pad
- 1x EVO Shifter Shift Block Assembly
- 1x E4T Encoder
Dimensions
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 installed
- Dog gear with four dogs on each face for increased strength
- Robust 1/8″ diameter shoulder screw
- Dog gear material: AMPCO 18 Bronze
- Super-strong shift block assembly with larger bearing and threaded steel housing
- Input stage uses 32 DP gears and a 15-tooth pinion gear
- High 85:15 first stage reduction
- Independent high and low ratio selection
- More encoder options available
- Aggressive weight reduction features
- Cluster gears with identical features surrounding the bore on both sides
- Optional third stage provides additional C ratio choice of 1.14 or 2:1
- Pneumatic shift method with spring-extend pneumatic cylinder
- Extend Stroke: 4 lbs, Retract Stroke: 15.7 lbs
- Included 15-tooth 32DP pinion gear
- Encoder Ratio: 3:1 on two-stage versions
Unconditional Satisfaction Guarantee
