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Spider Jaw Coupler 5x8mm is a flexible shaft coupling designed to connect compatible 5mm and 8mm shafts, motor shafts, lead screws, and motion-system components. Built with two aluminum alloy hubs and an elastomer spider insert, it helps transmit torque while damping vibration and allowing minor misalignment in supported assemblies.
$14.75
50 in stock
This Spider Jaw Coupler 5x8mm is a flexible shaft coupling designed to connect compatible 5mm and 8mm shafts in motion-control and rotational power transmission applications. It is commonly used with motor shafts, lead screws, small machine assemblies, 3D printer hardware, CNC-style mechanisms, robotics projects, and custom mechanical builds.
The Spider Jaw Coupler 5x8mm connects a 5mm shaft to an 8mm shaft, making it useful for motor-to-lead-screw and motor-to-shaft connections. Always confirm both shaft diameters, shaft engagement depth, set screw position, and available installation space before ordering.
This coupler uses a three-piece design with two metallic hubs and an elastomer insert commonly called the spider. The hubs clamp to the shafts, while the spider insert sits between them to help transmit torque and reduce harsh vibration transfer between components.
Unlike a rigid coupler, a spider jaw coupler can help damp vibration and allow a small amount of misalignment between connected shafts. This can help protect motors, bearings, lead screws, and surrounding hardware from unnecessary stress when the assembly is properly installed.
The current product page lists this coupler with aluminum alloy construction, silver-tone finish, clamp fixing style, M3 thread size, and an elastomer spider insert. The listed size details include a 5mm to 8mm connection diameter, approximately 26mm total length, 20mm outside diameter, and 18.1g weight.
This shaft coupler may be used in compatible 3D printer assemblies, CNC machines, robotics projects, lead screw drives, motor shaft connections, fixtures, repair work, and small power-transmission systems. Compatibility depends on bore size, torque requirements, shaft alignment, speed, load, mounting style, and full assembly design.
The current dnb3D page lists this coupler as a Rat Rig V-Core 3 specific part, with 3 pieces required for that listed application. The same page also notes that the V-Core 3.1 was updated to use a rigid coupler with similar specifications, so confirm your exact Rat Rig version and build guide before ordering.
For general coupling selection and background on jaw couplings, you can review this NBK jaw coupling technical reference. Always confirm bore size, torque rating, alignment, spider material, and machine requirements before installing a shaft coupler.
If you are sourcing additional mechanical components, browse our Hardware category or our 3D Printer Parts category for related couplers, bearings, fasteners, electronics, and motion-system parts.
Each order is handled by dnb3D in Marathon, Ontario, Canada. This 5x8mm spider jaw shaft coupler is useful for compatible motion-system repairs, 3D printer maintenance, lead screw setups, and small mechanical builds.
Below are the confirmed specifications for this Spider Jaw Coupler 5x8mm. Always verify shaft size, bore size, alignment, torque requirements, and assembly compatibility before ordering or installation.
| Product Name | Spider Jaw Coupler 5x8mm |
|---|---|
| Product Type | Spider jaw shaft coupler / flexible shaft coupling |
| SKU | DB-0029-4927 |
| Bore Size 1 | 5mm |
| Bore Size 2 | 8mm |
| Connection Diameter | 5mm to 8mm |
| Length | 25mm listed; detailed page text also lists 26mm / 1.02in total length |
| Outer Diameter | 20mm / 0.79in |
| Construction | Two metallic hubs with elastomer spider insert |
| Hub Material | Aluminum alloy |
| Insert Type | Elastomer spider insert |
| Colour | Silver tone |
| Fixing Style | Clamp |
| Thread Size | M3 |
| Weight | 18.1g |
| Common Applications | Compatible motor shafts, lead screw assemblies, motion systems, 3D printer hardware, CNC-style machines, robotics, fixtures, small machinery, and mechanical repair work |
| Listed Printer Application | One listed Rat Rig V-Core 3 application uses 3 pieces; verify exact printer version before ordering |
| Quantity Sold | 1 spider jaw coupler per quantity unless otherwise listed |
| Installation Warning | Confirm bore size, shaft fit, clamp engagement, alignment, torque requirements, spider condition, and full assembly compatibility before installation. |
| Fulfillment | Hand-inspected and precision-shipped from dnb3D in Marathon, Ontario, Canada |
Before installing this Spider Jaw Coupler 5x8mm, confirm that your assembly requires a 5mm to 8mm flexible jaw coupling. Check both shaft diameters, shaft depth, motor shaft length, lead screw size, cl engagement, and available installation clearance before use.
Install one hub on the first shaft and the second hub on the mating shaft, then position the elastomer spider insert between the hubs. Confirm that both shafts are seated correctly and that the coupling is not compressed, stretched, or forced out of alignment.
Spider jaw couplers can help d vibration and tolerate minor misalignment, but they are not a fix for poor assembly geometry. Excessive angular, parallel, or axial misalignment can still cause binding, noise, vibration, bearing load, motor stress, or premature wear.
Tighten cl screws evenly and securely without over-tightening. After initial machine movement, recheck cl engagement and make sure the coupler has not shifted on the shaft. Inspect set screws, cls, shafts, and the spider insert during maintenance.
This coupler may be used in compatible 3D printer hardware, lead screw motion systems, CNC-style machines, robotics projects, fixtures, and mechanical repairs. Compatibility depends on shaft size, alignment, torque, speed, frame rigidity, and the design of the full motion assembly.
Inspect the coupler periodically for loose cl screws, worn spider insert, shaft slippage, cracked hubs, vibration, wobble, or unusual noise. Replace the coupler or spider insert if wear or damage is visible.
Keep the coupler clean and dry before installation. Avoid dropping it, damaging the bore surfaces, contaminating the spider insert, or storing it loose with abrasive hardware that may scratch the mating surfaces.
Each order is checked before fulfillment and precision-shipped from dnb3D in Marathon, Ontario, Canada.
At dnb3D, we don’t just ship boxes—we manufacture solutions. Operating our Industry 4.0 micro-factory in Marathon, Ontario, means your order is handled by the same people who design and test these components.
Ready to Ship (3D Printer Parts & Hardware): Finished, inspected, and on the shelf. Dispatched within 1 to 2 business days.
In-House Manufacturing (Laser, Plasma, 3D Prints): These items are manufactured “fresh” to order. Please allow 3 to 5 business days for precision cutting and finishing.
Custom Projects: Bespoke designs require a consultation and a locked-in timeline before production begins.
We ship nationwide across Canada and the USA. Centrally located on the North Shore of Lake Superior, we are uniquely positioned to get your products moving quickly to either coast.
We stand behind every weld, cut, and print. If a product doesn’t meet your expectations, contact the Hub within 30 days. If we wouldn’t put it in our own shop, we won’t let it sit in yours.
Standard Items: Contact us within 30 days for return authorization. Items must be in original, unused condition.
Custom/Personalized Orders: Digitally fabricated to your exact specs (names, custom dimensions, or unique finishes) are final sale once production begins.
Shipping Costs: Return shipping is the responsibility of the customer unless the item arrived damaged or defective.
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