Bearings 12 × 30 × 8 mm
4 items fitting a seat with 12 mm bore, 30 mm outside diameter and 8 mm width. All genuine FAG and INA, with manufacturer technical data.
This seat holds 4 items, all of the same type: deep groove ball bearing. They differ in design: 2RSR seals, open and 2Z shields. They come with C3 and CN clearance. One ships within 24 h, the rest are brought in to order.
How items of the same size differ
One seat size comes in several designs. The suffix tells them apart: 2Z means shields on both sides, 2RSR contact seals, C3 a clearance greater than normal (for higher operating temperatures); no clearance suffix means normal CN. For dirty environments choose contact seals, for high speed a shield.
How to measure a bearing
The bore d takes the shaft, the outside diameter D sits in the housing, B is the ring width. Measure with a caliper on a cold, cleaned bearing; catalogue sizes are whole millimetres or halves, so a reading of 24.97 mm means 25 mm.
Common questions about this size
- Which bearing has dimensions 12 × 30 × 8 mm?
- 4 items in our catalogue fit this seat — among them 16101-A-2RSR, 16101-A and 16101-A-2Z. The base number is shared across manufacturers; only the suffixes describing the design differ.
- Which of them are in stock?
- Shipping within 24 h from stock: 16101-A. The rest are brought in to order — the delivery date is on each item's page.
- Can I take a different design in the same size?
- The seat fits in every design, but what changes is what decides service life. Contact seals (2RSR) keep dust and moisture out better, shields (2Z) allow higher speeds, C3 clearance is needed with heat or a tight fit, and open bearings need lubrication from outside.