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When a worn or failed bearing causes unwanted shaft play, vibration, or seized rotation in your machinery, finding an exact-fit replacement quickly is critical. Engineers, maintenance technicians, and serious DIY builders working on motors, gearboxes, conveyors, and power tools rely on standardized 6000-series deep groove ball bearings to restore smooth, dependable operation without custom machining.
These ZZ double-shielded deep groove ball bearings are manufactured from bearing-grade steel with a pressed steel shield on both sides to retain grease and exclude contaminants. The series spans 6000ZZ through 6024ZZ, covering bore diameters from 10mm (0.39 in) to 120mm (4.72 in) and outer diameters from 26mm (1.02 in) to 180mm (7.09 in), with widths ranging from 8mm (0.31 in) to 28mm (1.10 in).
Typical applications include electric motor shaft support, skateboard and inline skate wheel bearings, 3D printer axis bearings, bicycle bottom brackets, small pump impeller shafts, and light industrial conveyor rollers — anywhere a compact, low-friction radial bearing with moderate axial load capacity is required.
| Series | 6000ZZ – 6024ZZ (6000 Series) |
|---|---|
| Shield Type | ZZ (Double Steel Shield, Both Sides) |
| Bore Diameter (ID) | 10mm – 120mm (0.39 in – 4.72 in) |
| Outer Diameter (OD) | 26mm – 180mm (1.02 in – 7.09 in) |
| Width (Thickness) | 8mm – 28mm (0.31 in – 1.10 in) |
| Material | Bearing-Grade Steel (Rings & Balls) |
| Cage Material | See variant options |
| Lubrication | Factory-Packed Grease (Sealed) |
| Bearing Type | Single-Row Deep Groove Ball Bearing |
| Dimensional Standard | ISO 15 / DIN 625 |
| Operating Temperature | See variant options |
| Dynamic Load Rating (C) | See variant options |
| Static Load Rating (C0) | See variant options |
| Quantity per Order | 1 PCS (per variant selected) |
Match the model number (e.g., 6004ZZ) to the existing bearing stamped on your old part, or measure the shaft diameter (bore/ID), housing bore (OD), and available axial space (width). Cross-reference these three dimensions with the size chart in the variant selector. The 6000-series number directly encodes the bore size: 6000=10mm, 6001=12mm, 6002=15mm, and so on up to 6024=120mm.
ZZ indicates that the bearing has a pressed steel shield on both sides of the raceway. These shields retain the factory grease and prevent coarse contaminants from entering. They are non-contact shields, meaning they do not touch the inner ring, which keeps friction lower than rubber-sealed (2RS) bearings. ZZ bearings are ideal for cleaner environments where low drag is a priority.
Yes. Deep groove ball bearings are designed primarily for radial loads but can accommodate moderate axial (thrust) loads in both directions. They are not suitable for heavy axial-only applications — for those, angular contact or thrust bearings are more appropriate. For typical motor shafts, conveyor rollers, and wheel hubs with combined loading, the 6000-series ZZ bearing performs reliably within its rated load envelope.
Standard bearing steel offers moderate corrosion resistance suitable for dry or lightly oiled indoor environments. The ZZ steel shields provide additional protection against dust and splash. For applications exposed to water, chemicals, or high humidity, consider stainless steel bearings (e.g., 6000-2RS stainless) instead. If you need to confirm corrosion resistance specifications for a specific environment, contact us before ordering.
No. These bearings are factory-packed with grease and sealed by the ZZ shields before shipment. They are ready to install directly into a clean housing. Do not wash out the factory grease or add incompatible lubricants, as this can reduce bearing life. If the application requires a specific grease type or re-lubrication interval, contact us to confirm compatibility.
Always apply installation force to the ring being press-fitted — inner ring when pressing onto a shaft, outer ring when pressing into a housing. Never strike the bearing directly with a hammer; use a bearing press, a proper fitting tool, or a sleeve that contacts only the correct ring face. Applying force through the balls will damage the raceways and shorten bearing life significantly. Ensure the shaft and housing are clean, within tolerance, and free of burrs before installation.
Both are the same bore/OD/width dimensions. The difference is the seal type: ZZ uses non-contact steel shields (lower friction, suitable for higher speeds, less effective against fine dust or moisture), while 2RS uses contact rubber seals (slightly higher drag, better sealing against fine particles and light moisture). Choose ZZ for motors and high-speed spindles; choose 2RS for outdoor, wet, or dusty environments.
