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When a standard deep-groove bearing simply won't fit your housing geometry, engineers and DIY builders turn to flanged micro ball bearings. The F6300–F6702 2Z series solves the alignment and retention challenge in compact assemblies — the integral flange seats flush against a shoulder bore, eliminating the need for snap rings or press-fit shoulders while keeping axial positioning precise.
These double shielded flange ball bearings are manufactured from bearing-grade steel with two pressed-steel shields (2Z / ZZ designation) on both faces. The shield pair retains factory-applied grease and blocks particulate ingress without the drag penalty of contact seals. Available models span inner diameters from 10 mm (0.394 in) to 30 mm (1.181 in) and outer diameters from 15 mm (0.591 in) to 72 mm (2.835 in), with thickness ranging from 4 mm (0.157 in) to 19 mm (0.748 in). Two sub-series are included: the ultra-thin F6700–F6702 flat-flange group and the standard-depth F6300–F6306 series.
Typical use cases include small DC motor end-caps requiring flanged retention, 3D printer carriage and extruder pivot points where axial float must be controlled, RC vehicle drivetrain idler positions, and precision jig fixtures in light industrial tooling. The 2Z shield configuration makes these double shielded flange ball bearings suitable for dusty workshop environments and enclosed gearbox cavities alike.
| Bearing Type | Single-row deep-groove ball bearing with flange |
|---|---|
| Shield Configuration | 2Z (ZZ) — double non-contact steel shields, both sides |
| Material | Bearing steel (rings & balls); pressed steel (shields) |
| Inner Diameter (ID) Range | 10 mm – 30 mm (0.394 in – 1.181 in) |
| Outer Diameter (OD) Range | 15 mm – 72 mm (0.591 in – 2.835 in) |
| Thickness Range | 4 mm – 19 mm (0.157 in – 0.748 in) |
| Available Models | F6700, F6701, F6702, F6300, F6301, F6302, F6303, F6304, F6305, F6306 |
| Lubrication | Factory-applied grease (pre-lubricated) |
| Radial Clearance | See variant options |
| Dynamic Load Rating | See variant options |
| Static Load Rating | See variant options |
| Max Operating Speed | See variant options |
| Pack Quantities | 1 pc / 3 pcs / 5 pcs / 10 pcs |
Match the bearing's inner diameter (ID) to your shaft diameter. For example, if your shaft is 15 mm, select F6702 (15×21×4 mm) from the thin series or F6302 (15×42×13 mm) from the standard-depth series depending on your available housing depth. Always verify the housing bore matches the bearing OD and that the flange recess accommodates the flange outer diameter.
The F6700–F6702 sub-series are ultra-thin flat-flange bearings with a thickness of only 4 mm, designed for space-constrained assemblies where axial depth is critical. The F6300–F6306 sub-series are standard-depth flanged bearings with greater load capacity and thicker cross-sections (11–19 mm), suited for applications requiring higher radial and axial load ratings.
2Z indicates that both sides of the bearing are fitted with non-contact pressed-steel shields. These shields retain the factory grease and block dust and light particulate from entering the bearing cavity. Unlike rubber contact seals (2RS), steel shields do not touch the inner ring, resulting in lower friction and higher permissible speeds, at the cost of slightly less sealing effectiveness against fine dust or liquid splash.
These bearings are made from standard bearing steel, which is not inherently stainless. They are suitable for dry to moderately dusty environments. For applications involving water exposure, high humidity, or chemical contact, consider stainless steel flanged bearings instead. Applying a compatible bearing grease or corrosion inhibitor can extend service life in mildly humid conditions.
Yes. The 2Z steel shield configuration and pre-applied grease make these bearings suitable for moderate-speed motor end-cap and spindle applications. Maximum permissible speed varies by model size — larger bearings (e.g., F6306) have lower speed limits than smaller ones (e.g., F6700). Contact us to confirm speed ratings for your specific model if operating near the upper speed range.
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 — never press through the balls or inner ring. For shaft installation, apply force to the inner ring only. Use a bearing press or a correctly sized sleeve to avoid cocking the bearing during installation. Do not hammer directly on the shield face.
For prototyping or single-machine repair, the 1-piece option lets you validate fit and performance before committing to stock. For small production runs or maintenance kits, the 3- or 5-piece packs offer a lower per-unit cost. The 10-piece pack provides the best per-unit value and is recommended for ongoing production or when maintaining a spare-parts inventory for multiple machines.
