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When a seized or wobbly bearing ruins a carefully assembled RC car or precision DIY mechanism, the root cause is almost always an undersized or poorly toleranced component. Hobbyists, model builders, and mechanical DIY enthusiasts who work at the sub-5mm scale need bore 2mm miniature deep groove ball bearings that fit exactly, spin freely, and hold up through repeated use without play or noise.
These miniature deep groove ball bearings feature a 2mm bore (inner diameter) and a full-complement cage design that evenly distributes load across all rolling elements. The full cage construction reduces friction and prevents ball-to-ball contact, extending service life in high-speed, low-load applications. Outer diameter and width vary by specific part number — see variant options for confirmed dimensions.
Typical applications include RC car wheel axles and steering pivots, small servo linkage pivot points, miniature gearbox shafts in toy mechanisms, and precision spindles in DIY robotics or instrumentation projects where a 2mm shaft diameter is specified.
| Bearing Type | Deep Groove Ball Bearing |
|---|---|
| Cage Type | Full Cage |
| Bore (Inner Diameter) | 2 mm (0.079 in) |
| Outer Diameter | See variant options |
| Width | See variant options |
| Material | Bearing Steel |
| Sealing | See variant options |
| Lubrication | Factory-greased |
| Load Direction | Radial + Light Axial |
| Typical Application | RC models, toy cars, DIY mechanisms, miniature gearboxes |
| Available Quantities | 1 pcs / 5 pcs / 10 pcs / 20 pcs |
Measure your shaft diameter first — these bearings are designed for a 2mm bore. Then measure the housing bore (the hole the bearing sits in) and compare it to the outer diameter listed in the variant you select. If you cannot measure directly, check your RC car's parts list or manufacturer spec sheet for the bearing designation (e.g., MR52, MR62, MR72) and match it to the variant options available.
A full cage bearing uses a retainer that holds each ball in a separate pocket, preventing ball-to-ball contact. This reduces friction and heat at higher speeds compared to a full-complement (cageless) design. For RC cars and toy mechanisms that spin at moderate-to-high RPM, the full cage design typically delivers quieter, smoother operation and longer service life.
These bearings are made from bearing steel with a consistent surface finish that resists light moisture exposure. For occasional outdoor use on dry or slightly damp surfaces they perform reliably. For sustained wet or muddy conditions, consider a shielded or sealed variant (ZZ or 2RS suffix) which adds a physical barrier against water and debris ingress. Check the variant options or contact us to confirm sealing type.
Yes. The 2mm bore deep groove ball bearing is a common choice for miniature robot joints, encoder shafts, and small stepper motor output shafts where a 2mm diameter shaft is used. The deep groove raceway handles the combined radial and light axial loads typical in these applications. Confirm the outer diameter and width match your housing design before ordering.
Most 1/24 to 1/18 scale RC cars use between 4 and 12 bearings depending on the drivetrain complexity. A 10-piece pack covers a full rebuild with a few spares. If you are building multiple cars or maintaining a workshop stock, the 20-piece option offers a better per-unit cost. The 1-piece and 5-piece options are ideal for single replacements or small prototype builds.
The suffix indicates the quantity per order: x1 = 1 piece, x5 = 5 pieces, x10 = 10 pieces, x20 = 20 pieces. All quantities are the same bearing — only the pack size differs. Select the quantity that matches your project needs using the Amount selector above.
Always press or tap on the ring being fitted — press on the inner race when fitting to a shaft, and press on the outer race when fitting into a housing. Never apply force through the rolling elements. For 2mm bore bearings, a correctly sized punch or a bearing press tool is recommended. Avoid hammering directly on the bearing face, as this can dent the raceways and cause premature failure.
