Image: ServoCity
12mm ID Linear Ball Bearing (21mm OD, 30mm Length) - 2 Pack
12mm ID Linear Ball Bearing (21mm OD, 30mm Length) - 2 Pack — bearings by goBILDA®.
No second supplier matched for this listing — ServoCity is the only route we can offer today. Our cross-store matching covers only part of the catalogue.
ServoCity: ships in 1–2 business days. Its shipping policy says: “Please Note: Pre-shipping order handling usually takes 1-2 business days. Some orders may take up to 5 days to process and ship.” Policy, read 8 Oct 2026. That is the supplier’s dispatch time, not a delivery date; carrier transit is extra.
- Material
- High-Carbon Steel Housing and Balls, Plastic Cage, Rubber Seals
- Weight
- 26 g(vendor states 0.95 oz (26g))
- Length
- 30 mm
- Inner diameter
- 12 mm
- Outer diameter
- 21 mm
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A linear ball bearing that carries sliding motion along a round shaft, used to guide carriages, gantries and linear axes in robot and motion builds. The listing gives an inner diameter of 12mm, an outer diameter of 21mm and a length of 30 mm, with a high-carbon steel housing and balls, a plastic cage and rubber seals. Each bearing weighs 26g, and the listing offers a two-pack. It is a mechanical part with no electrical interface.