Description
- AndyMark EVO Shifter am14u Family Hex Shaft, StageA 2 Stage – 22.67:1 Ratio, StageB 2 Stage – 10.86:1 Ratio
- Offers shift-on-the-fly capability
- Incorporates robust AMPCO 18 Bronze gear
- Supports CIM or NEO motors
- Allows flexible output shaft selection
- Features pneumatic shift with spring-extend cylinder
The AndyMark EVO Shifter am14u Family Hex Shaft, StageA 2 Stage – 22.67:1 Ratio, StageB 2 Stage – 10.86:1 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 gears. 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.
Significant improvements have been made over previous models, including a robust 1/8″ diameter shoulder screw and the use of AMPCO 18 Bronze for the dog gear, which enhances strength and lubricity. The shift block assembly is reinforced with a larger bearing and threaded steel housing. The input stage employs 32 DP gears and a 15-tooth pinion gear, facilitating a high first stage reduction of 85:15. Users can independently select high and low ratios, with the option to swap ratios as needed. The gearbox also supports various encoder options, including the US Digital E4T.
The EVO Shifter features aggressive weight reduction through machined gears and plates, and the cluster gears are designed for easy assembly without orientation concerns. An optional third stage provides additional ratio choices. The gearbox can be mounted to an AM14U family chassis or a 2″x1″ box tube frame. It utilizes a pneumatic shift method powered by a spring-extend pneumatic cylinder, allowing for shifting during acceleration, pushing, or deceleration.
The gearbox requires proper greasing for optimal performance and longevity. A break-in period without grease is recommended to ensure smooth operation, followed by periodic application of grease to the spur gears. The encoder ratio for two-stage versions is 3:1, and the gearbox includes shielded, flanged ball bearings, 1117 steel 32 DP gears, and 4140 steel output shafts.
View moreWhat’s Included
- 1x AndyMark EVO Shifter am14u Family Hex Shaft, StageA 2 Stage – 22.67:1 Ratio, StageB 2 Stage – 10.86:1 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
- Encoder Mount Pad
- EVO Shifter Shift Block Assembly
- 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 interior 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
- Can be mounted to an AM14U family chassis or a 2″x1″ box tube frame
- 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
