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Description
AndyMark EVO Shifter Short Hex Shaft, StageA 3 Stage - 25.90:1 Ratio 1.14:1, StageB 3 Stage - 05.45:1 Ratio 1.14:1
Offers shift-on-the-fly with two-speed gearbox
Features improved 4-tooth dog shifting method
Optimizes performance with pneumatic shift method
Includes multiple encoder options for precision
Supports aggressive weight reduction design
The AndyMark EVO Shifter Short Hex Shaft, StageA 3 Stage - 25.90:1 Ratio 1.14:1, StageB 3 Stage - 05.45:1 Ratio 1.14:1 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 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, 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 lubricity for smoother shifting. The gearbox features a high 85:15 first stage reduction, and users can independently select their high and low ratios, allowing for customizable performance. The gearbox also includes a super-strong shift block assembly with a larger bearing and threaded steel housing.
The pneumatic shift method utilizes a spring-extend pneumatic cylinder, enabling shifts while a robot is accelerating, pushing, or decelerating. This design ensures that the robot can continue to operate using Ratio A if air pressure is lost. The gearbox is designed for aggressive weight reduction, with machined gears and plates, and can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
The EVO Shifter offers more encoder options, including the US Digital E4T and the CTRE SRX mag encoder. The gearbox requires grease for optimal operation, with a recommended break-in period before applying grease to ensure smooth performance. The encoder ratio for the two-stage version is 3:1, providing precise control and feedback.
Note: Proper installation of the pinion gear requires specific procedures, including the use of a 3-ton arbor press for NEO motors and the application of red Loctite 271 for CIM motors to ensure secure attachment.
1x AndyMark EVO Shifter Short Hex Shaft, StageA 3 Stage - 25.90:1 Ratio 1.14:1, StageB 3 Stage - 05.45:1 Ratio 1.14:1
If you are not satisfied for whatever reason with a Product you bought on the Site, it is possible to return it for refund within 30 days from the date you received it unless otherwise indicated in the Product listing. You must first advise the Vendor associated with your order in your account to obtain a return authorization (‘’RA’’) number before returning a Product. (‘’RA’’) numbers are valid for 30 days, within which time the returned Products should be received by the Vendor. No returns will be accepted without having previously obtained an (‘’RA’’) number. The Product must then be returned in its original packaging (in perfect condition for resale) with its receipt and your (‘’RA’’) number. Reimbursement will be denied for any Products which do not conform to the above mentioned conditions.
Build-it-yourself Robot Parts are not refundable once assembled. Robots & Kits requiring assembly or soldering are also not refundable once assembled, soldered or modified in any way. All sales of robotic software and apps are final and cannot be refunded or exchanged. Returns are not accepted on special orders and clearance items except when they are found defective, in which case the Product may be repaired or replaced at the Vendor’s discretion. 20% Restocking fees may apply if you are returning a large quantity of the same Product that was ordered specifically for you from the manufacturer.
Please note that all items will be reimbursed within 7 to 14 days of receiving the Product (shipping fees excluded). You must also cover the cost of returning the Product. Shipping fees will only be refunded if the return is a result of a shipping error on our part. Cleaning fees of USD 100 may also be charged if a domestic robot is returned and has not been properly cleaned.
