Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 12.00:1 Ratio 2:1, StageB 3 – 09.54:1 Ratio 2:1
- Advances shifting with 4-tooth dog mechanism
- Supports two CIM or NEO motors
- Offers flexible two or three interior stages
- Features AMPCO 18 Bronze dog gear
- Employs pneumatic shift for dynamic control
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 12.00:1 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 incorporates an enhanced 4-tooth dog shifting mechanism, allowing for seamless transitions between speeds. It is compatible with 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 delivered assembled, though motors are not pre-installed.
Notable improvements in this model include a robust 1/8″ diameter shoulder screw and a dog gear crafted from AMPCO 18 Bronze, which provides enhanced strength and lubricity compared to previous stainless steel designs. The shift block assembly has been fortified with a larger bearing and threaded steel housing, ensuring durability. The input stage employs 32 DP gears and a 15-tooth pinion gear, facilitating a high 85:15 first stage reduction. Users have the liberty to independently select high and low ratios, with the option to swap between them as needed.
The gearbox features aggressive weight reduction techniques and is designed for easy assembly, with cluster gears that have identical features on both sides. An optional third stage offers an additional C ratio choice. The pneumatic shift method, powered by a spring-extend pneumatic cylinder, allows for shifting even during acceleration or deceleration. The gearbox is compatible with various encoder options, including the US Digital E4T and the CTRE SRX mag encoder.
Note: Proper greasing is essential for optimal operation and longevity. It is recommended to run the gearbox for 30 minutes without grease for initial wear-in, followed by periodic application of grease to the spur gears. No grease is required on the AMPCO bronze dog gear.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 12.00:1 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 (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
- 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 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 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
