Description
- AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 09.54:1 Ratio 2:1, StageB 3 – 45.33:1 Ratio 2:1
- Incorporates 4-tooth dog shifting mechanism
- Supports CIM or NEO motors
- Offers flexible 2 or 3 interior stages
- Features AMPCO 18 Bronze dog gear
- Employs a spring-extend pneumatic cylinder
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 09.54:1 Ratio 2:1, StageB 3 – 45.33:1 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 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 installed.
Significant improvements have been made over previous models, including the use of AMPCO 18 Bronze for the dog gear, which provides increased strength and lubricity. The shift block assembly has been reinforced with a larger bearing and threaded steel housing, enhancing durability. The input stage features 32 DP gears and a 15-tooth pinion gear, facilitating a high first stage reduction of 85:15. Users have the autonomy to select their preferred high and low ratios, with the option to swap ratios as needed.
The gearbox also supports various encoder options, including the US Digital E4T, and features aggressive weight reduction through machined gears and plates. The pneumatic shift method employs a spring-extend pneumatic cylinder, allowing shifts to occur even during acceleration or deceleration. The gearbox is designed to be mounted on an AM14U family chassis or a 2″x1″ box tube frame, utilizing existing mounting plate holes.
Note: Proper greasing is essential for optimal operation and longevity of the gearbox. It is recommended to run the gearbox for 30 minutes without grease for initial wear-in before applying grease to the spur gears periodically.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 – 09.54:1 Ratio 2:1, StageB 3 – 45.33:1 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
- Individual hardware within three-stage assembly
Dimensions
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
- 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
