Servocity goBILDA 1309 Series Sonic Hub w/ 8mm Bore
Description
- Servocity goBILDA 1309 Series Sonic Hub w/ 8mm Bore
- Integral part of the goBILDA® ecosystem
- Impeccably balanced design for high-speed applications
- Constructed from durable, lightweight aluminum
- Easy disassembly without causing shaft damage
The Servocity goBILDA 1309 Series Sonic Hub w/ 8mm Bore is designed to facilitate the mounting of components onto an 8mm diameter shaft. It is an integral part of the expansive goBILDA® ecosystem, which comprises a multitude of parts that can be directly bolted to this hub. These parts range from wheels, gears, and sprockets to timing pulleys, control arms, and more.
The Sonic Hub's innovative design is impeccably balanced, ensuring that it does not introduce vibrations into the build, even in high-speed applications. The patented design of the Sonic Hub ensures a firm grip on the shaft without causing any damage. Furthermore, it can be easily disassembled as it releases its grip on the shaft readily.
The hub is meticulously machined for high-precision fitment. It is constructed from aluminum, which is known for its excellent strength-to-weight ratio, making the hub both lightweight and robust. The pinch bolts are made of zinc-plated steel. This combination of materials ensures that the hub will not corrode or rust, thereby enhancing its durability.
Please note that the Sonic Hub is designed to hold tightly to the shaft without causing damage. However, when disassembling, it is important to ensure that it releases its grip on the shaft to prevent any potential damage.
- 1x Servocity goBILDA 1309 Series Sonic Hub w/ 8mm Bore

- Bore: 8 mm
- Material: Aluminum
- Finish: Clear Anodized
- Made for 8mm Shafting
- High-Speed Design - Completely Balanced
- Precisely Machined
- Lightweight and Strong
- Weight: 14 g
Haven't used the hub for very long. I needed a balanced hub for an application that requires 3500 rpm. Tested it to 5000 RPM. No noticable vibration. Works as expected.
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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.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorization (RA) before initiating a return request.
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.
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- 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.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
How to Request a Return Authorization (RA)
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]".