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Precision F688ZZ Flange Bearing for smooth rotary motion in 3D printers, guide rollers, pulleys, idlers, robotics, fixtures, and custom mechanical assemblies.
$2.95
The F688ZZ Flange Bearing is a compact shielded ball bearing with an integrated flange for smooth rotary motion in 3D printers, pulleys, guide rollers, idlers, robotics, small machines, fixtures, and custom DIY mechanical assemblies. With an 8mm bore, 16mm outer diameter, and compact bearing width, this bearing is useful for projects that need an 8mm bearing with extra edge support or positioning control.
The “F” designation indicates a flanged bearing design. The flange acts as a small shoulder on the outside of the bearing, helping locate the bearing in a pocket, guide it against a plate, or prevent it from sliding completely through a mounting hole. This makes the F688ZZ Flange Bearing especially useful in guide roller assemblies, 3D printed parts, pulley systems, small wheels, and custom brackets where bearing placement matters.
Compared with a standard 688ZZ bearing, the F688ZZ includes a flange that can help with alignment, spacing, and retention. The flange can sit against the face of a printed part, machined bracket, laser-cut plate, acrylic panel, or bearing pocket, creating a built-in stop. This is helpful when a bearing needs to stay positioned without relying only on friction, press fit, or extra washers.
The ZZ designation means the bearing includes metal shields on both sides. These shields help reduce contamination from dust, filament particles, shop debris, and general handling while maintaining smooth rotation. ZZ shields are not waterproof seals, but they are useful for many indoor 3D printer, robotics, pulley, roller, and light machine applications.
The F688ZZ Flange Bearing can be used in compact guide rollers, small wheels, belt idlers, pulleys, spool holders, robotics mechanisms, sliding fixtures, model projects, and custom mechanical assemblies. It is especially useful when the flange can help control side position or provide a clean bearing stop in the mounting design.
Because the F688ZZ bearing is small and easy to design around, it can be used in 3D printed parts, CNC brackets, laser-cut plates, acrylic panels, and custom hardware. A properly sized bearing pocket can hold the bearing securely while allowing smooth rotation. For press-fit applications, test your fit before final assembly to avoid cracking printed parts or deforming softer materials.
For related assembly hardware, browse the Fasteners category. This bearing can be paired with Metric Socket Head Screws, M8 hardware, spacers, washers, brackets, printed parts, and other 3D printer or fabrication components from dnb3D.
Deep groove ball bearings are commonly used for compact rotary motion because they support smooth rotation with relatively low friction. Flanged bearing styles add a locating shoulder that can help with retention and positioning in compact assemblies. For general engineering context on bearing selection and terminology, see this deep groove ball bearing reference.
Every order is hand-inspected and precision-shipped from dnb3D in Marathon, Ontario. Whether you are repairing a 3D printer, building a guide roller, designing a compact pulley system, or stocking spare machine hardware, this F688ZZ Flange Bearing provides a simple and reliable shielded bearing solution with built-in flange support.
The F688ZZ Flange Bearing is a compact shielded deep groove ball bearing with an integrated flange for 8mm shaft rotary motion applications.
| Product Type | Shielded flanged deep groove ball bearing |
|---|---|
| Bearing Series | F688ZZ |
| Inner Diameter / Bore | 8mm |
| Outer Diameter | 16mm bearing outside diameter |
| Width | 5mm bearing width, excluding flange shoulder if applicable |
| Flange Type | Integrated outer flange / locating shoulder |
| Common Size Format | 8mm ID × 16mm OD × 5mm width, flanged |
| Shield Type | ZZ metal shields on both sides |
| Compatible Hardware | 8mm shafts, M8-compatible axles, bolts, shoulder screws, bearing pockets, guide rollers, pulleys, wheels, and custom holders |
| Common Applications | 3D printers, pulleys, idlers, guide rollers, small wheels, robotics, spool holders, fixtures, small machines, and DIY mechanical assemblies |
| Installation Style | Used in compatible bearing pockets, brackets, wheels, rollers, shafts, or axle assemblies where a flange shoulder is useful |
| Assembly Warning | Do not force onto an oversized shaft or press unevenly into a tight pocket. Excess force can damage the bearing, flange, shield, or surrounding part. |
| Fulfillment | Hand-inspected and precision-shipped from dnb3D in Marathon, Ontario, Canada |
Before installing the F688ZZ Flange Bearing, confirm that your shaft, axle, bolt, or bearing pocket matches the bearing dimensions. This bearing has an 8mm bore and 16mm main outer diameter. A mismatched shaft or pocket can cause binding, looseness, rough rotation, or bearing damage.
The integrated flange is designed to act as a small locating shoulder. When installed correctly, the flange can help position the bearing against a plate, printed part, bracket, or pocket face. Make sure the flange has proper clearance and does not rub against moving parts unless your design specifically uses it as a guide surface.
If the bearing is being pressed into a wheel, printed part, pulley, or bracket, apply pressure evenly around the outer race. Avoid pressing directly on the shield, flange edge, or inner race when seating the bearing into a pocket. Do not hammer the bearing directly.
The bearing should fit compatible 8mm shafts or axle hardware without excessive force. Forcing the bearing onto an oversized or damaged shaft can damage the inner race, shields, flange, or internal balls. Inspect shafts for burrs, rust, dents, or debris before installation.
The ZZ metal shields help protect the bearing from dust and light debris, but the bearing should still be kept clean. Avoid exposing it to abrasive dust, metal chips, excessive moisture, glue, paint, or cutting debris. Wipe surrounding parts before final assembly.
Deep groove ball bearings work best when properly aligned. Misaligned shafts, twisted brackets, uneven bearing pockets, or side-loaded assemblies can create rough rotation and premature wear. Check that the bearing rotates freely after installation.
When using the bearing in a wheel, pulley, idler, or guide roller assembly, make sure spacers, washers, and bolts do not rub against the shield or outer race unless the design specifically allows it. The rotating and fixed parts should have proper clearance.
Every order is hand-inspected before shipping. dnb3D precision-ships bearings, fasteners, and small mechanical hardware across Canada from our Ontario facility, helping makers, builders, and machine owners receive clean, usable parts ready for careful installation.
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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