AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 04.77:1 Ratio, StageB 2 - 07.56:1 Ratio
Advances seamless shifting with 4-tooth dog mechanism
Enhances durability using AMPCO® 18 Bronze gear
Supports two CIM or NEO motors configuration
Employs pneumatic shift with spring-extend cylinder
Allows flexible gear ratio selection and change
The AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 04.77:1 Ratio, StageB 2 - 07.56:1 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 speeds. It is compatible with two CIM or NEO motors and can be configured with either two or three interior stages, offering flexibility in output shaft selection. The gearbox is delivered assembled, though motors are not pre-installed.
Several enhancements distinguish the EVO Shifter from its predecessors. The dog gear now features four dogs on each face, enhancing the strength and durability of the design. The use of AMPCO® 18 Bronze for the dog gear material provides added lubricity, ensuring smooth shifting operations. A robust shift block assembly with a larger bearing and threaded steel housing further contributes to the gearbox's reliability. The input stage utilizes 32 DP gears and a 15-tooth pinion gear, facilitating a high first stage reduction. Users have the autonomy to select their preferred high and low ratios, with the ability to interchange them as needed.
The EVO Shifter employs a pneumatic shift method, powered by a spring-extend pneumatic cylinder, allowing for shifting during various operational states such as acceleration or deceleration. The gearbox is designed for easy assembly and disassembly, with features that ensure 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 performance and longevity. A break-in period of 30 minutes without grease is recommended to allow the gear teeth to wear in, followed by periodic application of grease to the spur gears. The AMPCO® bronze dog gear does not require greasing. The encoder ratio for programming purposes is 3:1 between the Output Shaft and Encoder Shaft for the two-stage version.
1x AndyMark EVO Shifter Short Keyed Shaft, StageA 2 - 04.77:1 Ratio, StageB 2 - 07.56:1 Ratio
WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov.
Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
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.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
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While the same return policy applies, these orders require a separate contact process for returns.
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]".
