AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 10.86:1 Ratio, StageB 2 - 04.77:1 Ratio
Enhances shifting with a 4-tooth dog method
Supports CIM or NEO motors configuration
Includes pneumatic shift for efficient changes
Features lightweight, durable construction
Offers customizable high and low gear ratios
The AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 10.86:1 Ratio, StageB 2 - 04.77:1 Ratio represents a significant advancement in shifting transmission gearboxes. This two-speed, shift-on-the-fly gearbox incorporates an improved 4-tooth dog shifting method, 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 performance. The gearbox is shipped assembled, though motors are not installed.
This model features several enhancements over previous iterations, 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 allows users to independently select high and low ratios, providing greater customization options. Additionally, it includes a super-strong shift block assembly with a larger bearing and threaded steel housing, contributing to its durability.
The EVO Shifter employs a pneumatic shift method, utilizing a spring-extend pneumatic cylinder for efficient gear changes even under varying conditions such as acceleration or deceleration. The gearbox is designed with aggressive weight reduction features, ensuring a lightweight yet sturdy construction. It also offers more encoder options, including the US Digital E4T encoder, enhancing its adaptability for various applications.
The gearbox's design facilitates easy assembly and disassembly, with all cluster gears featuring identical characteristics on both sides, eliminating concerns about correct gear orientation. It can be mounted to an AM14U family chassis or a 2"x1" box tube frame using existing mounting plate holes. The gearbox requires proper greasing for optimal operation and longevity, with a recommended break-in period before applying grease to the spur gears.
Note: Ensure proper handling and installation of pinion gears, particularly when using a NEO motor, as a 3-ton arbor press is required for installation due to the interference fit.
1x AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 10.86:1 Ratio, StageB 2 - 04.77:1 Ratio
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This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
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The RA number is valid for 30 days. The returned item must be received within that period.
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Return Exceptions
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Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
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Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
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RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
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Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
