The AndyMark 4in. SD Mecanum Single Wheel is a versatile component designed for robotics applications, particularly suitable for FTC robots. This wheel is sold as an unassembled kit, allowing for customization and assembly into either left or right-handed configurations using the same parts. Its compact 4-inch diameter makes it an ideal choice for projects requiring a smaller form factor.
This Mecanum wheel is engineered to directly mount to a Tetrix Wheel Hub, offering flexibility in its application. It can be driven with an axle and hub, accommodating various AndyMark hubs, except the Small DD Globe Hub. The wheel's construction from durable materials such as polycarbonate, TPU, and nylon ensures reliability and longevity in performance.
The wheel's design includes twelve individual rollers, which contribute to its unique movement capabilities, allowing for multidirectional navigation. This feature is particularly advantageous in robotics competitions where maneuverability is crucial.
Note: Ensure proper assembly to avoid operational hazards.
1x AndyMark 4in. SD Mecanum Single Wheel
Two - Mecanum Body Halves
Twelve - Individual 4-40 x 1/2" PPHS
Twelve - Individual Rollers
Twelve - Individual Washers
Six - Wheel Spindle
Six - Individual 4-40 x 1" STS
Diameter: 4 inches (100 mm)
Width Across Middle: 1.125 inches (28.6 mm)
Width at Rollers: 2.0 inches (50 mm)
Bolt circle: 0.138 in. (3.5 mm) diameter holes on a 0.630 in. (16 mm) bolt circle, 0.200 in. (5.1 mm) diameter holes on a 1.875 in. (47.6 mm) bolt circle
Bore: Nub bore
Forward/reverse coefficient of friction: 0.51 on FTC soft-tile
Load capacity: 17 lbs (7 kg) per wheel or 50 lbs (31.6 kg) per set of 4
Material: Polycarbonate, TPU, Nylon
Roller durometer: 80A
Rollers: 6, with each being 2 independent rollers
Sideways coefficient of friction: 0.67 on FTC soft-tile
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:
A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
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.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
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.
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.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
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]".
