What is the difference between 2Z and 2RSR?

2Z means shields on both sides — they do not touch the inner ring, so they add no friction and allow higher speeds, but they only stop coarser dust. 2RSR means contact seals: they keep out fine dust and moisture, at the cost of higher drag and a lower limiting speed.

When should I choose C3 clearance instead of normal?

Use C3 when the bearing runs at elevated temperature, when the inner ring is pressed tightly onto the shaft, or when the outer ring sits tightly in the housing. In each case the operating clearance shrinks during work and normal CN could reach zero, which ends in seizure.

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Ball bearings

Deep groove, angular contact, self-aligning and spindle

1–12 z 925

Last few (3)
FAG
108-TVH
Self-aligning ball bearing
⌀8 × 22 × 7 mm
dispatch within 24 h
EUR 11.46incl. VAT
Last few (1)
FAG
11212-TVH
Self-aligning ball bearing
⌀60 × 110 × 62 mm
dispatch within 24 h
EUR 72.95incl. VAT
EUR 97.27−25%
Last few (4)
FAG
1200-TVH
Self-aligning ball bearing
⌀10 × 30 × 9 mm
dispatch within 24 h
EUR 10.43incl. VAT
EUR 11.09−6%
In stock (35 pcs)
FAG
1201-TVH
Self-aligning ball bearing
⌀12 × 32 × 10 mm
dispatch within 24 h
EUR 9.61incl. VAT
EUR 11.86−19%
In stock (108 pcs)
FAG
1201-TVH-C3
Self-aligning ball bearing
⌀12 × 32 × 10 mm
dispatch within 24 h
EUR 8.43incl. VAT
EUR 10.39−19%
Last few (2)
FAG
1204-K-TVH-C3
Self-aligning ball bearing
⌀20 × 47 × 14 mm
dispatch within 24 h
EUR 9.19incl. VAT
EUR 12.25−25%
Last few (4)
FAG
1205-K-TVH-C3
Self-aligning ball bearing
⌀25 × 52 × 15 mm
dispatch within 24 h
EUR 10.95incl. VAT
EUR 14.59−25%
Last few (6)
FAG
1212-TVH
Self-aligning ball bearing
⌀60 × 110 × 22 mm
dispatch within 24 h
EUR 29.46incl. VAT
EUR 36.37−19%
Last few (8)
FAG
1212-TVH-C3
Self-aligning ball bearing
⌀60 × 110 × 22 mm
dispatch within 24 h
EUR 31.98incl. VAT
EUR 42.63−25%
Last few (6)
FAG
1217-K-TVH-C3
Self-aligning ball bearing
⌀85 × 150 × 28 mm
dispatch within 24 h
EUR 100.02incl. VAT
EUR 117.67−15%
Last few (1)
FAG
1220-K-M-C3
Self-aligning ball bearing
⌀100 × 180 × 34 mm
dispatch within 24 h
EUR 222.88incl. VAT
EUR 297.17−25%
Last few (1)
FAG
1222-K-M-C3
Self-aligning ball bearing
⌀110 × 200 × 38 mm
dispatch within 24 h
EUR 231.30incl. VAT
EUR 308.40−25%

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Łożyska kulkowe

Ball bearings are the most widely used type of rolling bearing. They carry radial loads and moderate axial loads in both directions, run with low friction and reach high speeds. You will find them in electric motors, fans, pumps, gearboxes — in practically every machine with a fast-turning shaft under moderate load.

The same seat size comes in several designs, and it is the design that decides service life in a given application. Open bearings run in an oil bath or on central lubrication. The 2Z version with shields does not touch the inner ring, so it adds no friction and suits high speeds. Contact seals (2RSR) keep out dust and moisture at the cost of slightly higher drag.

What to look at when selecting

Load mainly radial — if axial load dominates, use an angular contact or tapered roller bearing.
Operating environment: dust and moisture call for contact seals (2RSR); a clean hall with high speed calls for shields (2Z).
Temperature above 70 °C or a tight shaft fit — choose increased clearance C3 instead of normal CN.
A polyamide cage (TVH) damps vibration and is lighter; a pressed steel cage takes higher temperatures.
For continuous duty check the limiting speed on the datasheet — it is given separately for grease and oil.

Common questions

What is the difference between 2Z and 2RSR?: 2Z means shields on both sides — they do not touch the inner ring, so they add no friction and allow higher speeds, but they only stop coarser dust. 2RSR means contact seals: they keep out fine dust and moisture, at the cost of higher drag and a lower limiting speed.
When should I choose C3 clearance instead of normal?: Use C3 when the bearing runs at elevated temperature, when the inner ring is pressed tightly onto the shaft, or when the outer ring sits tightly in the housing. In each case the operating clearance shrinks during work and normal CN could reach zero, which ends in seizure.