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When your build demands a bearing that fits where standard-width units simply won't, engineers, robotics builders, and precision DIYers reach for super thin wall sealed ball bearings. The narrow cross-section of the 67xx and 68xx series solves the recurring problem of axial space constraints in motors, spindles, RC vehicles, and lightweight mechanical assemblies — without sacrificing radial load capacity.
This listing covers steel deep groove ball bearings from 6700ZZ through 6810ZZ, spanning inner diameters of 10–50 mm (0.39–1.97 in) and outer diameters of 15–65 mm (0.59–2.56 in). Wall thickness ranges from 4–7 mm (0.16–0.28 in) depending on the series. Each bearing features double-shielded ZZ steel closures that retain grease and block particulate ingress, with a chrome steel raceway for consistent rolling performance under moderate radial loads.
Typical use cases include 3D printer carriage and extruder assemblies requiring thin-wall deep groove ball bearings, brushless motor front and rear support in FPV drones and RC cars, and compact gearbox or pulley shaft support in automation and conveyor systems where axial space is at a premium.
| Bearing Series | 67xx (6700ZZ–6707ZZ) / 68xx (6800ZZ–6810ZZ) |
|---|---|
| Seal Type | ZZ (double steel shield, both sides) |
| Material | Chrome steel (GCr15 equivalent) |
| Inner Diameter (I.D.) | 10–50 mm (0.39–1.97 in) — see variant options |
| Outer Diameter (O.D.) | 15–65 mm (0.59–2.56 in) — see variant options |
| Thickness | 4–7 mm (0.16–0.28 in) — see variant options |
| Bearing Type | Single-row deep groove ball bearing |
| Lubrication | Factory-greased (grease retained by ZZ shields) |
| Operating Temperature | Typically –20°C to +120°C (–4°F to +248°F) |
| Pack Quantity | 1PCS / 4PCS / 10PCS — see variant options |
| Dimensional Standard | ISO 492 / ABEC-3 equivalent |
The 67xx series (6700ZZ–6707ZZ) has a 4 mm thickness, making it the thinner option for the most space-constrained builds. The 68xx series (6800ZZ–6810ZZ) ranges from 5–7 mm thick and offers slightly higher load ratings for the same bore size. If axial depth is your primary constraint, start with the 67xx. If you need a bit more radial capacity and have the room, the 68xx is the better fit.
ZZ refers to double steel shields pressed into grooves on both sides of the bearing. They block most dust and retain grease but are non-contact, meaning there is a small gap between the shield and the inner ring. 2RS (rubber seals) make contact with the inner ring, providing better sealing against moisture and fine particles but adding slightly more drag. For dry, low-contamination environments like 3D printers or electronics, ZZ is sufficient and runs with less friction.
Yes, within the rated speed limits for the selected size. Smaller bore bearings (e.g., 6700ZZ at 10 mm I.D.) can typically handle higher RPM than larger ones. The ZZ shield design keeps drag low, which supports higher rotational speeds compared to rubber-sealed variants. For exact speed ratings, refer to the bearing number's published data sheet or contact us to confirm suitability for your specific RPM requirement.
These bearings are not rated for full submersion or continuous exposure to water and corrosive fluids. The ZZ steel shields provide basic dust and splash protection, but the chrome steel construction will corrode under prolonged moisture exposure. For outdoor or wash-down applications, consider stainless steel bearings with rubber seals (2RS). For light outdoor use with occasional moisture, re-greasing after exposure can extend service life.
Measure your shaft diameter (this equals the I.D.) and your housing bore (this equals the O.D.). Then match those measurements to the variant size listed as I.D. x O.D. x Thickness in mm. For example, if your shaft is 20 mm and your housing bore is 32 mm, select the 6804ZZ (20x32x7 mm). If you are replacing an existing bearing, the bearing number is usually stamped on the outer ring.
Load capacity varies by bearing number and size. As a general guide, the 67xx and 68xx series are designed for light to moderate radial loads — typical dynamic load ratings range from approximately 0.5 kN to 6 kN depending on the specific size. They are not intended for heavy axial (thrust) loads. For exact dynamic and static load ratings for your selected bearing number, contact us to confirm or refer to the published specification for that bearing designation.
The 10-piece pack already provides a per-unit discount compared to the 1-piece option. If you need quantities beyond 10 pieces for production or maintenance stock, contact us directly to discuss volume pricing. We can accommodate larger orders for most bearing numbers in this series.
