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.

Interchange guidance

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° equivalent. 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.