Description
- AndyMark EVO Shifter Short Keyed Shaft, StageA 2 – 04.77:1 Ratio, StageB 2 – 06.00:1 Ratio
- Advances seamless two-speed shifting
- Allows CIM or NEO motor compatibility
- Incorporates robust AMPCO 18 Bronze gears
- Offers flexible staging and mounting options
- Enhances encoder choices and weight reduction
The AndyMark EVO Shifter Short Keyed Shaft, StageA 2 – 04.77:1 Ratio, StageB 2 – 06.00:1 Ratio 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 EVO Shifter features several improvements over previous models, including a robust 1/8″ diameter shoulder screw and a dog gear made from AMPCO 18 Bronze, which provides added lubricity for smoother operation. The gearbox’s input stage utilizes 32 DP gears and a 15-tooth pinion gear, achieving a high 85:15 first stage reduction. Users can independently select high and low ratios, with the ability to swap between them as needed. Additionally, the gearbox offers more encoder options, including the US Digital E4T and the CTRE SRX mag encoder.
The design incorporates aggressive weight reduction features and allows for easy assembly and disassembly due to the uniform features of the cluster gears. An optional third stage provides additional ratio choices, and the gearbox can be mounted to an AM14U family chassis or a 2″x1″ box tube frame. The pneumatic shift method, powered by a spring-extend pneumatic cylinder, enables shifting while a robot is in motion.
The gearbox requires proper greasing for optimal performance and longevity. It is recommended to run the gearbox for a short period without grease to allow the gear teeth to wear in before applying grease. The gearbox is shipped assembled but without motors, even if motors are included in the order. Note: Ensure proper installation of the pinion gear using the recommended procedures to avoid operational issues.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Keyed Shaft, StageA 2 – 04.77:1 Ratio, StageB 2 – 06.00:1 Ratio
- 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
Specifications
- Two-speed, shift-on-the-fly gearbox
- Improved four-tooth dog shifting method
- Motor input: two CIM or NEO motors
- Configurable with two or three interior stages
- Selection of various 1/2 inch output shafts
- Plates designed for mounting two motors
- Shipped assembled without motors
- 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
- Swap ratios (A to B to A) as needed
- More encoder options available
- Aggressive weight reduction features
- Cluster gears with the same features on both sides for easy assembly
- Optional third stage provides additional C ratio choice of 1.14 or 2:1
- Mountable to AM14U family chassis or 2″x1″ box tube frame
- Pneumatic shift method with spring-extend pneumatic cylinder
- Extend Stroke: 4 lbs, Retract Stroke: 15.7 lbs
- 15-tooth 32DP pinion gear included
- Red Loctite 271 recommended for pinion installation
- Gearbox requires grease for proper operation
- Encoder ratio: 3:1 on two-stage versions
Unconditional Satisfaction Guarantee
