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When a seized bearing brings a motor, wheel, or spindle to a halt, downtime adds up fast. Hobbyists, repair technicians, and mechanical engineers who work with compact rotating assemblies need a bearing that fits precisely, runs quietly, and holds up under repeated load cycles. These 63800-ZZ miniature deep groove ball bearings deliver exactly that in a 10-piece pack sized for workshop stock.
Each bearing in this pack measures 10 mm inner diameter × 19 mm outer diameter × 7 mm width (approx. 0.394" × 0.748" × 0.276"). The double-metal-shield (ZZ) design keeps grease in and contaminants out without adding significant drag. The chrome steel raceway and ball complement a precision-ground groove profile for smooth, low-noise operation across a wide RPM range.
Common applications include small DC and stepper motors, RC car and drone drivetrains, skateboard and inline-skate wheel axles, 3D printer carriage assemblies, and light-duty industrial spindles — anywhere a 10 mm bore deep groove ball bearing is specified.
| Bearing Model | 63800-ZZ / 63800Z |
|---|---|
| Inner Diameter (Bore) | 10 mm (0.394") |
| Outer Diameter | 19 mm (0.748") |
| Width | 7 mm (0.276") |
| Shield Type | Double metal shield (ZZ) |
| Material | Chrome steel (GCr15) |
| Lubrication | Grease-filled (factory pre-lubricated) |
| Quantity per Pack | 10 pieces |
| Dynamic Load Rating | See variant options |
| Static Load Rating | See variant options |
| Max RPM | See variant options |
Both designations refer to the same bearing with double metal shields on each side. "ZZ" is the most common notation used by bearing manufacturers worldwide, while "Z" or "63800Z" is an alternate shorthand. The physical dimensions and performance characteristics are identical — 10 mm bore, 19 mm OD, 7 mm width.
Yes. Each bearing is factory-filled with grease behind the metal shields before shipping. For most hobby and light-duty applications, no additional lubrication is needed at installation. If operating in high-temperature or high-speed environments, consult the equipment manufacturer's lubrication specification.
The ZZ metal shields provide basic protection against dust and light splash, but they are not fully waterproof. For sustained exposure to water, mud, or corrosive environments, consider rubber-sealed (2RS) bearings or stainless steel variants. Contact us to confirm availability of alternative seal types.
These bearings are compatible with any assembly that specifies a 63800-series bearing with a 10 mm bore, 19 mm outer diameter, and 7 mm width. Typical uses include small DC and stepper motors, RC car and drone drivetrains, 3D printer carriages, skateboard and inline-skate axles, and light industrial spindles. Always verify dimensions against your application's engineering drawing or existing bearing before ordering.
This listing ships 10 bearings per pack. For a single-axis motor or wheel replacement, one pack typically covers multiple repair cycles. For larger builds — such as a full 3D printer or multi-wheel RC chassis — calculate the total bearing count per machine and order accordingly. Having spares on hand reduces future downtime.
Always apply installation force to the ring being pressed — inner ring when pressing onto a shaft, outer ring when pressing into a housing. Use a bearing press, arbor press, or a correctly sized socket as a driver. Never strike the bearing directly with a hammer, and avoid applying force across the balls, as this can brinell the raceways and shorten service life. If the fit is very tight, gentle, even heating of the housing (not the bearing) can ease installation.
