AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 18.71:1 Ratio, StageB 2 - 06.86:1 Ratio
Offers two-speed shift-on-the-fly
Includes AMPCO® 18 Bronze dog gear
Features pneumatic shift method
Allows independent ratio selection
Ensures robust and efficient design
The AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 18.71:1 Ratio, StageB 2 - 06.86:1 Ratio represents a significant advancement in shifting transmission gearboxes. This two-speed, shift-on-the-fly gearbox incorporates a refined 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 performance. The gearbox is shipped assembled, though motors are not pre-installed.
Several enhancements distinguish this model from its predecessors. The dog gear, crafted from AMPCO® 18 Bronze, provides increased strength and lubricity, facilitating smoother shifts. A robust shoulder screw and a new shift block assembly with a larger bearing and threaded steel housing contribute to the gearbox's durability. The input stage employs 32 DP gears and a 15-tooth pinion gear, achieving a high first stage reduction of 85:15. Users can independently select high and low ratios, with the option to swap ratios as needed, enhancing adaptability.
The EVO Shifter also features a pneumatic shift method, utilizing a spring-extend pneumatic cylinder for reliable operation even during acceleration or deceleration. The gearbox's design includes aggressive weight reduction features, ensuring efficiency without compromising strength. It is compatible with various encoder options, including the US Digital E4T, and can be mounted to an AM14U family chassis or a 2"x1" box tube frame using existing mounting plate holes.
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, followed by periodic application of grease to the spur gears.
1x AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 18.71:1 Ratio, StageB 2 - 06.86:1 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
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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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A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
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Return Exceptions
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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]".
