Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 06.86:1 Ratio 1.14:1, StageB 3 – 25.90:1 Ratio 1.14:1
- Enhances gear shifts with 4-tooth dog mechanism
- Supports CIM or NEO motors, configurable stages
- Utilizes AMPCO 18 Bronze for smooth shifting
- Employs pneumatic shift for efficient transitions
- Facilitates easy assembly with uniform gear features
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 06.86:1 Ratio 1.14:1, StageB 3 – 25.90:1 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 mechanism, allowing for seamless 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 included.
This model features several improvements over previous iterations, 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, facilitating a high 85:15 first stage reduction. Users can independently select high and low ratios, and the gearbox supports various encoder options, including the US Digital E4T.
The EVO Shifter utilizes a pneumatic shift method powered by a spring-extend pneumatic cylinder, enabling gear shifts even during acceleration or deceleration. The gearbox is designed with aggressive weight reduction features and allows for easy assembly and disassembly due to the uniform features on both sides of the cluster gears. It can be mounted to an AM14U family chassis or a 2″x1″ box tube frame using existing mounting plate holes.
Note: Ensure proper greasing for optimal operation and longevity, and follow recommended procedures for pinion installation if using a NEO motor.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 06.86:1 Ratio 1.14:1, StageB 3 – 25.90:1 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
- 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 for added lubricity
- 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 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
- Included 15-tooth 32DP pinion gear
- Encoder ratio: 3:1 on two-stage versions
Unconditional Satisfaction Guarantee
