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When your build demands a bearing that seats flush against a housing wall without a separate retaining clip, standard miniature bearings fall short. Engineers, hobbyists, and repair technicians working on RC cars, 3D printers, robotics, and precision instruments rely on flanged miniature bearings to lock axial position while keeping the overall assembly compact. The integrated flange shoulder eliminates the need for additional hardware and simplifies installation in blind-bore housings.
This listing covers the F604ZZ through F695ZZ series — nine sizes of flange deep groove ball bearings constructed from chrome steel (GCr15) raceways with a stamped steel flange collar. Double-contact steel shields (ZZ) on both sides retain grease and block particulate ingress without adding significant drag. Inner bore diameters range from 3 mm (≈ 0.118 in) to 8 mm (≈ 0.315 in), outer diameters from 9 mm to 22 mm (≈ 0.354 in to 0.866 in), and widths from 4 mm to 7 mm (≈ 0.157 in to 0.276 in), covering the most common miniature flanged bearing sizes in a single product listing.
Typical use cases include flanged miniature bearings for 3D printer extruder idlers, RC car wheel hubs, drone motor mounts, small gearbox output shafts, and medical device actuators — anywhere a low-profile, self-locating bearing is required. The ZZ shield configuration makes these suitable for light-to-moderate radial loads in dry or lightly lubricated environments.
The stamped steel flange shoulder provides positive axial location against the housing face, eliminating snap rings or retaining clips in most blind-bore designs.
Non-contact steel shields on both sides retain factory grease and reduce contamination ingress, extending service intervals in dusty or lightly misted environments.
F604ZZ through F695ZZ covers bore sizes from 3 mm to 8 mm and ODs from 9 mm to 22 mm — select the exact size you need from the variant dropdown.
GCr15 chrome steel construction delivers consistent hardness and fatigue resistance for radial load applications in motors, gearboxes, and precision mechanisms.
Width dimensions of 4–7 mm keep the bearing stack height minimal, making these ideal for space-constrained assemblies such as 3D printer carriages and RC drivetrains.
Dimensions conform to standard F6xx series tolerances, allowing direct substitution in existing housings without machining modifications.
| Bearing Series | F604ZZ, F608ZZ, F623ZZ, F624ZZ, F625ZZ, F684ZZ, F688ZZ, F694ZZ, F695ZZ |
|---|---|
| Type | Flange Deep Groove Ball Bearing |
| Shield Type | ZZ — Double-sided non-contact steel shields |
| Material | Chrome steel (GCr15) raceways; stamped steel flange and shields |
| Inner Bore (d) | 3 mm – 8 mm (≈ 0.118 in – 0.315 in) — See variant options |
| Outer Diameter (D) | 9 mm – 22 mm (≈ 0.354 in – 0.866 in) — See variant options |
| Width (B) | 4 mm – 7 mm (≈ 0.157 in – 0.276 in) — See variant options |
| Flange Diameter | See variant options |
| Lubrication | Factory-greased (light grease, sealed by ZZ shields) |
| Operating Temperature | Typically −10 °C to +120 °C (14 °F to 248 °F) |
| Radial Load Capacity | See variant options |
| Quantity per Order | 1 piece |
Match the inner bore (d) to your shaft diameter and the outer diameter (D) to your housing bore. The flange OD must clear the housing counterbore. Cross-reference the variant name — for example, F604ZZ (4 × 13 × 4 mm) means 4 mm bore, 13 mm OD, 4 mm width. If you are unsure, contact us to confirm before ordering.
ZZ indicates double-sided non-contact steel shields. The shields retain factory grease inside the bearing and reduce the entry of dust and light debris from both sides. They do not form a full seal, so these bearings are not suitable for submersion or high-pressure wash-down environments.
These bearings are made from chrome steel (GCr15), which offers good hardness and fatigue resistance but limited corrosion resistance. For humid or mildly corrosive environments, apply a compatible bearing grease or consider stainless steel variants. Avoid prolonged exposure to water or acidic conditions.
Yes, provided the bore, OD, width, and flange dimensions match your existing bearing. The F6xx series follows standard dimensional tolerances, so these are typically drop-in replacements for OEM flanged miniature bearings of the same designation. Always verify dimensions against your machine's service manual or bearing housing drawing.
Flange deep groove ball bearings are primarily designed for radial loads and can accommodate moderate axial (thrust) loads in both directions. They are not intended for heavy axial-only applications. For combined load scenarios, verify the dynamic and static load ratings against your application requirements — contact us if you need specific load data.
Yes. The F6xx ZZ flanged series is widely used in 3D printer extruder idlers and carriage wheels, RC car wheel hubs and steering knuckles, small robot joint actuators, and drone motor mounts. The compact width and integrated flange make installation straightforward in these applications without additional retaining hardware.
These bearings come pre-greased from the factory and are sealed by the ZZ shields, so re-lubrication is generally not required for light-duty applications. For high-speed or high-cycle applications, inspect periodically and re-grease if you notice increased noise or heat. Use a grease compatible with chrome steel bearings (e.g., lithium-based grease, NLGI Grade 2).
