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When a standard bearing slips out of its housing under axial load, or when your compact mechanism has no room for a retaining clip, a flanged ball bearing is the engineered answer. Hobbyists building RC cars, engineers designing 3D printer extruder carriages, and technicians maintaining small motors all face the same challenge: keeping a bearing seated without adding bulk. These ZZ double-shielded flanged ball bearings solve that problem with a machined flange that registers against the housing face, eliminating axial migration without additional hardware.
Each bearing consists of an inner ring, outer ring with integrated flange, a full complement of chrome steel or stainless steel balls (depending on series), and two metal shields (ZZ designation) pressed into the outer ring grooves. The F-series (e.g., F682-ZZ, F683-ZZ, F6200-ZZ) follows the standard flanged deep-groove geometry; the MF-series (e.g., MF52-ZZ, MF63-ZZ, MF74-ZZ) uses a metric flanged format with a slightly larger flange OD relative to bore. Inner diameters span 2 mm (≈0.079 in) to 50 mm (≈1.969 in); outer diameters range from 5 mm to 90 mm; widths from 2.3 mm to 20 mm — see variant options for exact d×D×B dimensions.
Typical deployment scenarios include 3D printer Z-axis lead-screw supports, RC car differential housings, brushless motor end caps, CNC router spindle pre-load stacks, and small robotic joint pivots where axial retention and low-profile installation are both required. The ZZ shields keep grease in and particulate contamination out, making these flanged ball bearings suitable for dusty workshop environments and enclosed gearboxes alike.
| Bearing Type | Flanged Deep-Groove Ball Bearing |
|---|---|
| Shield Type | ZZ (double metal shield, both sides) |
| Series | F-series (F682–F6210, F6000–F6010, F6800–F6808, F6900–F6908) & MF-series (MF52–MF148) |
| Inner Diameter (d) | 2 mm – 50 mm (see variant options) |
| Outer Diameter (D) | 5 mm – 90 mm (see variant options) |
| Width (B) | 2.3 mm – 20 mm (see variant options) |
| Dimension Format | d × D × B (mm), listed in each variant name |
| Lubrication | Factory-greased (sealed by ZZ shields) |
| Material | See variant options |
| Operating Temperature | See variant options |
| Pack Quantity | 1 pc or 3 pcs (select via Units option) |
| Flange Feature | Integrated outer-ring flange for axial location |
Both series are flanged deep-groove ball bearings with ZZ double shields. The F-series (e.g., F682-ZZ, F683-ZZ) follows a standard flanged geometry where the flange OD is a modest step above the outer diameter. The MF-series (e.g., MF52-ZZ, MF63-ZZ) uses a metric flanged format that typically provides a proportionally larger flange OD relative to the bore, which is useful when you need a wider bearing shoulder against a thin housing wall. Check the d×D×B dimensions in each variant name to confirm which fits your housing.
You need three measurements: the shaft diameter (matches the inner diameter d), the housing bore diameter (matches the outer diameter D), and the available axial depth (must be ≥ width B). Additionally, confirm that your housing has a flange recess or counterbore to accept the flange OD. All three dimensions are listed in the variant name in the format d×D×B (mm). If you are replacing an existing bearing, read the model number stamped on the shield — it maps directly to the variant names listed here.
Yes. Flanged ball bearings are widely used in 3D printer extruder carriages, Z-axis lead-screw supports, and idler pulley mounts because the flange eliminates the need for retaining clips in printed or machined housings. In RC cars, they are common in differential housings and motor end caps. The ZZ shields retain grease and resist the fine plastic dust and debris generated during printing or off-road driving. Select the variant whose d×D×B matches your printer or car's bearing seat dimensions.
ZZ indicates that both sides of the bearing are fitted with pressed-steel (metal) shields. These shields are non-contact or lightly contacting, which means they retain the factory-applied grease inside the raceway while blocking external contamination. Because the shields are not removable without damage, these bearings are not designed for re-lubrication in the field — they are intended to run for their service life on the factory grease. For applications requiring periodic re-greasing, a 2RS (rubber-sealed, removable) variant would be more appropriate.
Standard ZZ-shielded bearings with chrome steel rings and balls are not recommended for prolonged exposure to water, salt spray, or corrosive chemicals, as the metal shields and rings can rust. For wet or mildly corrosive environments, look for stainless steel variants (typically designated with an "A5" or "SS" suffix). If your application involves occasional moisture — such as an outdoor RC car on damp terrain — the ZZ shields provide a reasonable barrier, but periodic inspection is advisable. Contact us to confirm material options for your specific model.
Deep-groove ball bearings handle both radial loads (perpendicular to the shaft axis) and moderate axial (thrust) loads in either direction. The flanged design adds axial location — it prevents the bearing from moving along the shaft axis within the housing — but the flange itself is not a load-bearing surface for heavy thrust. For applications with dominant axial loads, a dedicated thrust bearing or angular contact bearing is more appropriate. For the mixed radial-plus-light-axial loads typical of RC drivetrains, 3D printer carriages, and small motors, these flanged deep-groove bearings are well-suited.
Press or slide the bearing into the housing bore until the flange seats flush against the housing face. Apply force only to the outer ring when pressing into the housing, and only to the inner ring when pressing onto a shaft — never apply force through the balls, as this damages the raceway. For miniature bearings (bore ≤ 10 mm), a bearing press tool or a correctly sized socket and arbor press is recommended. Avoid hammering directly on the shield face. Once seated, the flange should be flush and the bearing should spin freely with no binding.
