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Reliable 625-2RS Ball Bearing for smooth rotary motion in 3D printers, wheels, pulleys, robotics, idlers, rollers, fixtures, and custom mechanical assemblies.
$1.95
The 625-2RS Ball Bearing is a compact sealed bearing used for smooth rotary motion in 3D printers, wheels, pulleys, rollers, idlers, robotics, small machines, fixtures, and custom DIY mechanical assemblies. With a 5mm bore, 16mm outer diameter, and 5mm width, this bearing is a practical choice for projects that need a small, sealed bearing around a 5mm shaft, screw, axle, or mounting point.
The 2RS designation means the bearing includes rubber seals on both sides. These seals help protect the internal bearing races and balls from dust, filament particles, shop debris, and light contamination. This makes the 625-2RS Ball Bearing useful in 3D printer parts, motion hardware, hobby machines, robotics mechanisms, and workshop projects where a compact bearing needs extra protection compared with an open bearing.
The 625-2RS size is often used where a 5mm shaft or M5-style axle arrangement is part of the design. It can be used with compatible bolts, shoulder screws, shafts, standoffs, rollers, pulleys, printed parts, machined brackets, and custom bearing holders. Always confirm the shaft size, bearing pocket, and required clearance before installation.
Rubber-sealed bearings are helpful when the bearing may be exposed to dust, plastic particles, light shop debris, or handling contamination. The seals do not make the bearing waterproof, but they help reduce the amount of debris entering the bearing during normal use. For 3D printer and light machine applications, this can help improve reliability and reduce maintenance.
The 625-2RS Ball Bearing can be used in 3D printer idlers, belt guides, small wheels, V-slot style rollers, pulleys, spool holders, robotics arms, sliding fixtures, model projects, and compact mechanical assemblies. It is also useful for makers and repair work where a small sealed bearing is needed for smooth rotation.
Because the 625-2RS bearing is small and widely used, it is easy to design into 3D printed parts, laser-cut plates, CNC brackets, 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, M5 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. 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 small pulley system, making a wheel assembly, or stocking spare machine hardware, this 625-2RS Ball Bearing provides a simple and reliable sealed bearing solution.
The 625-2RS Ball Bearing is a compact sealed deep groove ball bearing designed for 5mm shaft rotary motion applications.
| Product Type | Sealed deep groove ball bearing |
|---|---|
| Bearing Series | 625-2RS |
| Inner Diameter / Bore | 5mm |
| Outer Diameter | 16mm |
| Width | 5mm |
| Size Format | 5mm ID × 16mm OD × 5mm width |
| Seal Type | 2RS rubber seals on both sides |
| Material | Bearing steel |
| Lubrication | Pre-lubricated from manufacturer |
| Compatible Hardware | 5mm shafts, M5-compatible axles, bolts, shoulder screws, bearing pockets, pulleys, rollers, and custom holders |
| Common Applications | 3D printers, pulleys, idlers, wheels, guide rollers, robotics, spool holders, fixtures, small machines, and DIY mechanical assemblies |
| Installation Style | Used in compatible bearing pockets, brackets, wheels, rollers, shafts, or axle assemblies |
| Assembly Warning | Do not force onto an oversized shaft or press unevenly into a tight pocket. Excess force can damage the bearing or surrounding part. |
| Fulfillment | Hand-inspected and precision-shipped from dnb3D in Marathon, Ontario, Canada |
Before installing the 625-2RS Ball Bearing, confirm that your shaft, axle, bolt, or bearing pocket matches the bearing dimensions. This bearing has a 5mm bore, 16mm outer diameter, and 5mm width. A mismatched shaft or pocket can cause binding, looseness, rough rotation, or bearing damage.
If the bearing is being pressed into a wheel, printed part, pulley, or bracket, apply pressure evenly around the outer race. Avoid pressing through the seal or applying uneven force across the bearing. Do not hammer the bearing directly.
The bearing should fit compatible 5mm shafts or axle hardware without excessive force. Forcing the bearing onto an oversized or damaged shaft can damage the inner race, seals, or internal balls. Inspect shafts for burrs, rust, dents, or debris before installation.
The 2RS rubber seals 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, or idler assembly, make sure spacers, washers, and bolts do not rub against the seal 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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