Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 06.86:1 Ratio 1.14:1, StageB 3 – 06.86:1 Ratio 1.14:1
- Features shift-on-the-fly two-speed gearbox
- Accommodates CIM or NEO motor input
- Utilizes AMPCO 18 Bronze for smooth shifting
- Offers independent high and low ratio selection
- Designed for weight reduction and easy assembly
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 06.86:1 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 is designed with an improved 4-tooth dog shifting method, allowing for seamless transitions between gears. It accommodates motor input from 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 shipped assembled, though motors are not installed.
Significant enhancements have been incorporated into the EVO Shifter, 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. The input stage features 32 DP gears and a 15-tooth pinion gear, facilitating a high 85:15 first stage reduction. Users can independently select high and low ratios and swap them as needed, with additional encoder options available.
The gearbox is designed with aggressive weight reduction features and cluster gears that allow for easy assembly without concern for gear orientation. An optional third stage offers an additional C ratio choice. The pneumatic shift method employs a spring-extend pneumatic cylinder, enabling shifts even during acceleration or deceleration. The gearbox is compatible with an AM14U family chassis or a 2″x1″ box tube frame, using existing mounting plate holes.
Note: Ensure proper greasing with Red Tacky Grease for optimal operation and longevity. A break-in period of 30 minutes without grease is recommended to allow gear teeth to wear in before applying grease periodically.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 06.86:1 Ratio 1.14:1, StageB 3 – 06.86:1 Ratio 1.14:1
- 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
- Motor input: 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 4 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
- Swap ratios (A to B to A) as needed
- More encoder options available
- Aggressive weight reduction features
- Cluster gears with identical features on both sides for easy assembly
- 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
- Encoder Ratio: 3:1 on two-stage versions
Unconditional Satisfaction Guarantee
