Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 12.41:1 Ratio 1.14:1, StageB 3 – 06.86:1 Ratio 1.14:1
- Offers two-speed, shift-on-the-fly operation
- Utilizes improved 4-tooth dog shifting method
- Configurable with two or three interior stages
- Employs robust AMPCO 18 Bronze dog gear
- Supports versatile encoder options
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 12.41:1 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 speeds. It accommodates motor input 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, even if included in the order.
Significant improvements have been made over previous models, including a robust 1/8″ diameter shoulder screw and a dog gear made from AMPCO 18 Bronze, which provides enhanced strength and lubricity. The gearbox features a super-strong shift block assembly with a larger bearing and threaded steel housing, contributing to its durability. The input stage utilizes 32 DP gears and a 15-tooth pinion gear, achieving a high 85:15 first stage reduction. Users have the ability to independently select high and low ratios, and the gearbox supports more encoder options, including the US Digital E4T.
The EVO Shifter employs a pneumatic shift method, powered by a spring-extend pneumatic cylinder, which 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 an additional C ratio choice, enhancing its versatility.
Note: Proper greasing is essential for the gearbox’s operation and longevity. It is recommended to run the gearbox for 30 minutes without grease for a break-in period before applying grease to the spur gears periodically. No grease is needed on the AMPCO bronze dog gear.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 12.41:1 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
Dimensions
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
- 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
