NSK7224CDBP5Angular Contact Ball Bearing – 120 mm ID, 215 mm OD, 40 mm Width, Open, 15° Contact Angle, ABEC 5, Back-to-Back Match.

Product Description

What this part is

NSK 7224CDBP5 super-precision angular contact ball bearing, 120 mm bore × 215 mm outside diameter × 40 mm width. Series: 7200. Contact Angle: 15°. Precision Class: P5, ABEC 5. Straight bore, open on both faces. One bearing.

Decoding the designation

Base Number: 7224C. C: 15° contact angle. DB: back-to-back matched arrangement. P5: ISO Class 5, ABEC 5. The trailing -1/2PR marks one bearing out of the matched pair. The number is also written 7224-C-DB-P5, 7224 C DB P5 and 7224CDB P5. Fafnir 2MM224WI covers the same bearing in the Fafnir scheme.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity. Basic Dynamic Load Rating: 250 kN. Basic Static Load Rating: 192 kN. Limiting Speed: 6,700 rpm on grease, 8,500 rpm on oil or oil-air. Mass: 5.42 kg. ABEC 5 tolerances hold closer shaft location and lower running vibration than a standard-class bearing.

Quantity and configuration

One bearing, ground as one half of a DB back-to-back matched pair. The second half of the pair is a 7224CDBP5 of the same match. A back-to-back pair sets the load lines apart, which carries moment loads and locates a shaft axially in both directions.

Fitting notes

The ring faces carry the ground offset that sets the pair preload, so the marked faces determine the orientation in the housing.

Cross-references

SKF 7224 CD/P5 covers the same envelope and 15° angle. RHP 7224CTDBP5 is the same bearing in the RHP scheme. Fafnir 2MM224WI is the Fafnir 15° cross-reference. FAG B7224-C-T-P5 is a related size on the same envelope with a phenolic cage. SKF 7224 ACD/P5 carries a 25° contact angle and is a related size.