Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 21.72:1 Ratio 2:1, StageB 3 – 12.00:1 Ratio 2:1
- Offers smooth gear transitions with 4-tooth dog shifting
- Supports two CIM or NEO motors, offering flexibility
- Features robust AMPCO 18 Bronze dog gear for strength
- Allows independent high and low ratio selection
- Integrates easily with existing systems for versatility
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 21.72:1 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 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 included.
The design improvements include a robust 1/8″ diameter shoulder screw and a dog gear made from AMPCO 18 Bronze, which provides added lubricity and strength. The shift block assembly is reinforced with a larger bearing and threaded steel housing, ensuring durability. The input stage features 32 DP gears and a 15-tooth pinion gear, facilitating a high 85:15 first stage reduction. Users have the autonomy to select their high and low ratios independently, with the option to swap ratios as needed.
The gearbox also supports various encoder options, including the US Digital E4T encoder. It features aggressive weight reduction techniques and cluster gears designed for easy assembly. An optional third stage offers an additional C ratio choice. The pneumatic shift method, powered by a spring-extend pneumatic cylinder, allows for seamless shifting even under dynamic conditions such as acceleration or deceleration.
The gearbox is designed for easy integration with existing systems, using mounting plate holes compatible with an AM14U family chassis or a 2″x1″ box tube frame. It is essential to apply grease periodically for optimal operation and longevity. The gearbox’s encoder ratio is 3:1 on two-stage versions, ensuring precise control and feedback during operation.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 21.72:1 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
- Individual hardware within two-stage assembly (excluding gears from ratio A and B)
- 1x Red Tacky Grease, 14.2 gram
- 1x Encoder Mount Pad
- 1x EVO Shifter Shift Block Assembly
- 1x E4T Encoder
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 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
- Encoder ratio: 3:1 on two-stage versions
Unconditional Satisfaction Guarantee
