Description
- AndyMark EVO Shifter am14u Family Shaft, StageA 3 Stage – 21.72:1 Ratio 2:1, StageB 3 Stage – 32.74:1 Ratio 2:1
- Enhances transition with 4-tooth dog shifting
- Accommodates two CIM or NEO motors
- Offers flexible two or three-stage configuration
- Features AMPCO 18 Bronze dog gear
- Supports multiple encoder options
The AndyMark EVO Shifter am14u Family Shaft, StageA 3 Stage – 21.72:1 Ratio 2:1, StageB 3 Stage – 32.74:1 Ratio 2:1 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 smooth and efficient transitions between gears. It accommodates motor inputs 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.
The EVO Shifter incorporates several enhancements over previous models, including a robust 1/8″ diameter shoulder screw and a dog gear made from AMPCO 18 Bronze, which provides added strength and lubricity. The shift block assembly is reinforced with a larger bearing and threaded steel housing, ensuring 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 freedom to select independent high and low ratios, and the gearbox supports various encoder options, including the US Digital E4T.
The gearbox features aggressive weight reduction through machined gears and plates, and the cluster gears are designed for easy assembly without concern for orientation. An optional third stage offers an additional C ratio choice. The EVO Shifter employs a pneumatic shift method with a spring-extend pneumatic cylinder, allowing for seamless shifting even during acceleration or deceleration. It is compatible with an AM14U family chassis or a 2″x1″ box tube frame, providing versatility in mounting options.
Note: Ensure proper greasing and break-in procedures are followed for optimal performance and longevity of the gearbox.
View moreWhat’s Included
- 1x AndyMark EVO Shifter am14u Family Shaft, StageA 3 Stage – 21.72:1 Ratio 2:1, StageB 3 Stage – 32.74:1 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 (am-2768)
- 1x Encoder Mount Pad (am-0208a)
- 1x EVO Shifter Shift Block Assembly (am-3451)
- 1x 4 Tooth Dog, AMPCO 18 Bronze (am-3532)
- 1x Shift Cylinder, 3/4″ Bore, 1/2 Stroke Spring Extend (am-3494)
- 1x E4T Encoder (am-3132)
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 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
- Encoder ratio: 3:1 on two-stage versions
Unconditional Satisfaction Guarantee
