Description
- AndyMark EVO Shifter Short Keyed Shaft, StageA 2 – 18.71:1 Ratio, StageB 2 – 05.45:1 Ratio
- Advances shifting gearbox design
- Supports CIM or NEO motors
- Utilizes strong AMPCO 18 Bronze
- Features aggressive weight reduction
- Allows independent gear ratio selection
The AndyMark EVO Shifter Short Keyed Shaft, StageA 2 – 18.71:1 Ratio, StageB 2 – 05.45:1 Ratio 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 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 enhanced strength and lubricity. The shift block assembly has been reinforced with a larger bearing and threaded steel housing. The input stage features 32 DP gears and a 15-tooth pinion gear, facilitating a high first stage reduction. Users have the freedom to independently select high and low ratios, and the gearbox supports various encoder options, including the US Digital E4T.
The EVO Shifter employs a pneumatic shift method, utilizing a spring-extend pneumatic cylinder for reliable performance even under dynamic conditions. The gearbox is designed with aggressive weight reduction features, making it suitable for mounting on an AM14U family chassis or a 2″x1″ box tube frame. The robust construction includes 4140 steel output shafts and pocketed aluminum side plates, ensuring durability and efficiency.
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 Red Tacky Grease periodically.
View moreWhat’s Included
- 1x AndyMark EVO Shifter Short Keyed Shaft, StageA 2 – 18.71:1 Ratio, StageB 2 – 05.45:1 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
- 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
- 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
- Pneumatic shift method with spring-extend pneumatic cylinder
- Encoder ratio: 3:1 on two-stage versions
- Features aggressive weight reduction
- Offers multiple encoder options
- Allows independent selection of high and low ratios
- Can be mounted to an AM14U family chassis or a 2″x1″ box tube frame
Unconditional Satisfaction Guarantee
