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When a standard bearing simply won't fit — or keeps walking out of its bore — engineers and hobbyists reach for a flanged design. The MF6000ZZ–MF6010ZZ series of miniature flange ball bearings solves that problem with a built-in locating flange that seats positively against a housing shoulder, eliminating axial migration without extra retaining hardware. These bearings are the go-to choice for RC vehicle builders, robotics integrators, 3D-printer designers, and precision instrument technicians who need reliable radial support in the smallest possible envelope.
Each bearing in this series is constructed from chrome steel (GCr15) inner and outer rings with a full complement of steel balls and pressed-steel ZZ double shields on both faces. The flange outer diameter extends beyond the standard OD to provide a positive stop. Sizes span ID 2 mm to 8 mm (approx. 0.079" to 0.315") and OD 5 mm to 14 mm (approx. 0.197" to 0.551"), with widths typically ranging from 2.5 mm to 4 mm (approx. 0.098" to 0.157"). Available models include MF52ZZ, MF63ZZ, MF74ZZ, MF83ZZ, MF84ZZ, MF85ZZ, MF95ZZ, MF104ZZ, MF105ZZ, MF106ZZ, MF115ZZ, MF117ZZ, MF126ZZ, MF128ZZ, and MF148ZZ.
Typical use cases for miniature flange ball bearings include stepper-motor shaft support in desktop CNC routers, idler pulley pivots in belt-driven 3D printers, and pivot points in micro-UAV control linkages — all applications where axial location accuracy and low rotational drag directly affect output quality. The double-shield construction keeps grease in and particulate contamination out, extending service intervals in workshop and field environments alike.
The flange shoulder registers directly against the housing face, providing positive axial location without snap rings, circlips, or adhesive — reducing assembly steps and part count.
Pressed-steel shields on both sides retain factory-applied grease and block ingress of dust, swarf, and fine particulate, maintaining lubrication integrity across extended run cycles.
Rings and balls are machined from through-hardened chrome steel, delivering the hardness and fatigue resistance needed for continuous rotational loads in compact mechanisms.
ID 2 mm through 8 mm across 15 standard models (MF52ZZ to MF148ZZ) covers the most common miniature shaft diameters used in RC, robotics, and precision instrumentation.
Available in packs of 1, 5, 10, or 50 pieces per order, allowing single-unit prototyping or bulk stocking for production runs without minimum-order friction.
Dimensions conform to widely adopted miniature flange bearing standards, making these a direct swap for worn or failed bearings in existing assemblies without housing modification.
| Series | MF6000ZZ – MF6010ZZ (MF52ZZ to MF148ZZ) |
|---|---|
| Bearing Type | Miniature flanged deep-groove ball bearing |
| Shield Type | Double shielded (ZZ) — both sides |
| Ring & Ball Material | Chrome steel (GCr15), through-hardened |
| Inner Diameter (ID) | 2 mm – 8 mm (see variant options) |
| Outer Diameter (OD) | 5 mm – 14 mm (see variant options) |
| Width / Thickness | 2.5 mm – 4 mm (see variant options) |
| Flange OD | See variant options |
| Lubrication | Factory-greased (sealed, non-serviceable) |
| Cage Type | See variant options / Contact us to confirm |
| Operating Temperature | Typically –20 °C to +120 °C |
| Available Quantities | 1 / 5 / 10 / 50 pcs per pack |
Match the bearing's Inner Diameter (ID) to your shaft diameter. For example, if your shaft is 5 mm, choose a model with ID 5 mm such as MF85ZZ (5×8×2.5 mm), MF95ZZ (5×9×3 mm), MF105ZZ (5×10×4 mm), or MF115ZZ (5×11×4 mm). The OD and width you select will depend on your housing bore and available axial space. Always verify all three dimensions — ID, OD, and width — before ordering.
The flange is a raised rim on one side of the outer ring that acts as a built-in shoulder stop. It prevents the bearing from being pushed through the housing bore under axial load, eliminating the need for separate retaining clips or adhesive. If your housing has a counterbore designed for a flanged bearing, this series is the correct choice. If your housing is a straight through-bore, a standard (non-flanged) bearing may be more appropriate.
These bearings are made from chrome steel (GCr15), which offers good hardness and load capacity but is not inherently stainless. In humid, wet, or mildly corrosive environments, surface rust can develop over time. For outdoor RC vehicles, marine robotics, or food-adjacent equipment, consider applying a light corrosion-inhibiting oil to exposed surfaces, or contact us to inquire about stainless steel alternatives.
ZZ (double-shielded) bearings use non-contact pressed-steel shields that leave a small gap between the shield edge and the inner ring. This results in very low friction and is suitable for clean, dry, or lightly contaminated environments. RS (rubber-sealed) bearings use a contact lip seal that provides better contamination exclusion at the cost of slightly higher drag. For most RC, robotics, and precision instrument applications, ZZ shields offer the right balance of protection and low rotational resistance.
Yes, provided the replacement bearing matches the original in ID, OD, width, and flange dimensions. These bearings conform to widely adopted miniature flange bearing standards, so they are typically drop-in compatible with assemblies originally designed for MF-series bearings. Measure your existing bearing or check the original equipment documentation to confirm all dimensions before ordering.
For prototyping or single-unit repair, the 1-piece or 5-piece pack lets you validate fit and performance without committing to bulk inventory. For small production runs or stocking a workshop, the 10-piece or 50-piece pack offers a lower per-unit cost. The 50-piece pack is particularly cost-effective for high-volume assembly lines or resellers who need consistent on-hand supply.
Dynamic load ratings and maximum RPM vary by model size — larger OD models generally support higher loads and speeds. Exact dynamic (Cr) and static (C0r) load ratings depend on the specific model selected. Contact us to confirm rated values for your chosen model if your application has defined load or speed requirements.
