Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your design leaves almost no room for a bearing — yet demands reliable rotation under radial and light axial loads — standard bearings simply won't fit. Engineers, robotics builders, and RC hobbyists working with space-constrained assemblies need a bearing that delivers full deep-groove performance in a dramatically reduced envelope. These super thin-wall sealed deep groove ball bearings are engineered exactly for that challenge.
Each bearing in this series features a chrome steel (GCr15) raceway and ball set, enclosed by dual steel shields (ZZ) that retain grease and block particulate ingress without adding significant width. The series spans seven sizes — 6700ZZ through 6706ZZ — with bore diameters from 10 mm (0.394 in) to 30 mm (1.181 in), outer diameters from 15 mm (0.591 in) to 37 mm (1.457 in), and a uniform 4 mm (0.157 in) width across the entire range. Available in quantities of 1, 4, or 10 pieces per order.
Typical applications include brushless motor front/rear bearing seats in RC cars and drones, joint pivot points in lightweight robotic arms, spindle support in compact medical instruments, and idler pulley assemblies in 3D printer extruder carriages — anywhere a thin-wall deep groove ball bearing for precision machinery is required.
| Bearing Series | 6700ZZ, 6701ZZ, 6702ZZ, 6703ZZ, 6704ZZ, 6705ZZ, 6706ZZ |
|---|---|
| Bore Diameter (ID) | 10 mm / 12 mm / 15 mm / 17 mm / 20 mm / 25 mm / 30 mm — see variant options |
| Outer Diameter (OD) | 15 mm / 18 mm / 21 mm / 23 mm / 27 mm / 32 mm / 37 mm — see variant options |
| Width | 4 mm (0.157 in) — uniform across all sizes |
| Bearing Type | Deep Groove Ball Bearing |
| Shield Type | Dual Steel Shields (ZZ / Non-contact) |
| Material | Chrome Steel (GCr15) |
| Lubrication | Grease-packed (factory pre-lubricated) |
| Radial Clearance | See variant options |
| Dynamic Load Rating (C) | See variant options |
| Static Load Rating (C₀) | See variant options |
| Max Operating Speed | See variant options |
| Operating Temperature | Typically −20 °C to +120 °C (−4 °F to +248 °F) |
| Available Quantities | 1 Pcs, 4 Pcs, 10 Pcs |
Measure the shaft diameter (bore/ID) and the housing bore (OD) in your assembly, then match them to the variant dimensions listed above. All sizes in this series share a 4 mm width, so if your housing depth is fixed at 4 mm, any size in the range will fit axially — you only need to match the bore and outer diameter. When in doubt, contact us to confirm before ordering.
These are deep groove ball bearings, which means they handle radial loads as the primary direction and can also carry moderate bidirectional axial (thrust) loads. They are not designed for heavy axial-only applications — for those, a thrust bearing or angular contact bearing would be more appropriate. Exact dynamic and static load ratings vary by size; contact us for specific values.
The ZZ steel shields on these bearings are snap-fit and can be carefully removed with a thin pick for re-lubrication, though this requires care to avoid distorting the shield. For most applications, the factory grease fill is sufficient for the bearing's service life. If your application demands frequent re-lubrication, consider specifying an open or rubber-sealed (2RS) variant instead.
The dual steel shields provide basic splash resistance and keep grease in place, but chrome steel raceways are susceptible to corrosion if exposed to standing water or high-humidity environments over extended periods. For outdoor or wash-down applications, consider stainless steel bearings or apply a compatible corrosion inhibitor. These bearings are well-suited for indoor machinery, RC vehicles, and electronics where moisture exposure is incidental rather than continuous.
Check your motor or spindle datasheet for the bearing seat dimensions: shaft diameter (ID), housing bore (OD), and axial space (width). Match those to the variant you select. The 6700ZZ series is a globally standardized designation, so any bearing labeled 6700ZZ, 6701ZZ, etc., will share the same envelope dimensions regardless of brand — making direct substitution straightforward.
Choose 1 Pcs for prototyping or single-unit repairs where you need to verify fit before committing. The 4 Pcs option suits most RC builds and small robotic assemblies that require one bearing per axis with a spare. The 10 Pcs pack offers the best per-unit value for small-batch production runs, classroom projects, or stocking a workshop supply of a frequently used size.
ZZ (or Z, ZZ) refers to non-contact steel shields on both sides of the bearing. They do not touch the inner ring, so friction is slightly lower and maximum speed is higher compared to rubber seals. 2RS (or RS, RZ) refers to rubber contact seals that provide better contamination exclusion at the cost of slightly higher drag. For high-speed, low-contamination environments — such as brushless motors and encoders — ZZ is typically the preferred choice.
