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When your build demands a bearing that fits into a recessed bore without a separate retaining shoulder, a standard bearing simply won't do. Engineers, hobbyists, and maintenance technicians working on RC vehicles, small motors, 3D printers, and precision instruments rely on flanged deep groove ball bearings ZZ to lock axially in place while keeping the assembly compact. The flange seats flush against the housing face, eliminating the need for snap rings or additional hardware.
These F-series flanged deep groove ball bearings feature a chrome steel (GCr15) inner and outer ring with a full complement of steel balls retained in a pressed-steel cage. The ZZ designation indicates double metal shields on both sides, providing effective protection against dust and light splash without the drag of rubber seals. Bore sizes span 2 mm to 12 mm (approximately 0.079 in to 0.472 in), with outer diameters and widths varying by bearing number — select your exact model from the Bearing No. option above.
Typical use cases include flanged deep groove ball bearings for RC car wheel hubs and steering pivots, miniature motor end-shields in power tools and drones, linear guide carriage pivot points, and medical or laboratory instrument spindles where low torque and dimensional accuracy are critical.
| Bearing Series | F-series (Flanged) Deep Groove Ball Bearing |
|---|---|
| Shield Type | ZZ — Double metal shields, both sides |
| Bore Diameter (d) | 2 mm – 12 mm (approx. 0.079 in – 0.472 in) |
| Outer Diameter (D) | See variant options |
| Bearing Width (B) | See variant options |
| Flange Diameter (Df) | See variant options |
| Flange Width (f) | See variant options |
| Material — Rings & Balls | Chrome steel (GCr15) |
| Cage Material | Pressed steel |
| Lubrication | Grease-packed (factory pre-lubricated) |
| Operating Temperature | Typically −10 °C to +120 °C (14 °F to 248 °F) |
| Radial Clearance | See variant options |
| Available Bearing Numbers | F604ZZZZ, F605ZZZZ, F606ZZZZ, F607ZZZZ, F608ZZZZ, F609ZZZZ, F623ZZZZ, F624ZZZZ, F625ZZZZ, F626ZZZZ, F627ZZZZ, F628ZZZZ, F629ZZZZ, F673ZZZZ, F674ZZZZ, F675ZZZZ, F676ZZZZ, F677ZZZZ, F678ZZZZ, F682ZZZZ, F683ZZZZ, F684ZZZZ, F685ZZZZ, F686ZZZZ, F687ZZZZ, F688ZZZZ, F689ZZZZ, F693ZZZZ, F694ZZZZ, F695ZZZZ, F696ZZZZ, F697ZZZZ, F698ZZZZ, F699ZZZZ, F6000ZZZZ, F6001ZZZZ, F6002ZZZZ, F6003ZZZZ, F6004ZZZZ, F6005ZZZZ, F6700ZZZZ, F6800ZZZZ, F6801ZZZZ, F6803ZZZZ, F6804ZZZZ, F6805ZZZZ, F6806ZZZZ, F6900ZZZZ, F6901ZZZZ, F6902ZZZZ, F6903ZZZZ, F6904ZZZZ, F6905ZZZZ |
| Pack Quantities | 1 Pcs / 2 Pcs / 4 Pcs / 10 Pcs |
| Dimensional Standard | ISO 15 / JIS B 1521 (metric) |
Measure the bore diameter (d), outer diameter (D), and width (B) of the existing bearing or housing. For flanged bearings, also note the flange diameter (Df) and flange width (f). Match these dimensions to the F-series bearing number in a standard bearing dimension table. If you have the original bearing, the number is usually stamped on the outer ring. Contact us with your measurements if you need help confirming the correct part.
ZZ indicates that the bearing has double metal shields — one pressed-steel shield on each side of the bearing. The shields reduce contamination ingress and retain the factory grease. Unlike rubber seals (2RS), metal shields do not contact the inner ring, resulting in slightly lower friction and higher permissible speeds, but they offer less sealing effectiveness in wet or heavily contaminated environments.
A flanged bearing has a raised rim (flange) on the outer ring that protrudes radially beyond the standard outer diameter. This flange acts as a built-in axial locating feature when the bearing is pressed into a through-bore housing — the flange seats against the housing face and prevents the bearing from being pushed through. Standard bearings require a shoulder, snap ring, or end cap to achieve the same axial retention.
F-series ZZ bearings are suitable for moderate-to-high speeds typical of small electric motors, RC vehicles, and light spindles. The metal shields allow higher speed ratings than rubber-sealed equivalents. For very high-speed or precision spindle applications, verify the specific bearing's limiting speed (rpm) against your operating conditions. Contact us to confirm suitability for your exact speed and load requirements.
ZZ metal shields provide protection against dust and light splash, but they are not fully waterproof. For intermittent light moisture exposure — such as RC cars on damp surfaces — they perform adequately when re-greased periodically. For continuous wet or submerged conditions, consider rubber-sealed (2RS) bearings or stainless-steel variants. If you are unsure, contact us to discuss the best option for your environment.
Select the quantity that matches your project needs. A 1-piece pack is ideal for single repairs or prototype builds where you need to verify fit before committing. A 2-piece pack suits applications with paired bearings on a single shaft (e.g., both ends of a motor). A 4-piece pack covers a full set for a 4-wheel RC vehicle or a small gearbox. A 10-piece pack offers the best per-unit value for production runs, maintenance stock, or team builds where multiple units are needed.
These bearings are factory pre-lubricated with a general-purpose lithium-based grease suitable for the operating temperature range of approximately −10 °C to +120 °C. Because the ZZ metal shields are not permanently sealed, they can be carefully removed with a thin tool for cleaning and re-greasing if the bearing is used in a demanding environment. Use a compatible bearing grease and avoid over-packing, which can increase drag and heat.
