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The NSK 7209CTYNDULP4 is a high-precision, single-row angular contact ball bearing supplied as a universally ground duplex set (DU). Technical Specifications & Dimensions • Bore Diameter (d): 45 mm • Outside Diameter (D): 85 mm • Width (B): 19 mm per bearing • Contact Angle (C): 15° • Cage Type (TYN): Ball-guided polyamide/resin cage designed for lower friction and reduced noise. • Preload / Arrangement (DU / L): Universally ground duplex pair with a light preload. • Accuracy Class (P4): ISO Tolerance Class 4 (equivalent to ABEC 7), offering high running and dimensional precision. • Dynamic Load Rating (Cr): 51.5 kN • Static Load Rating (C0r): 28.8 kN • Limiting Speeds: 17,700 rpm (grease) / 22,000–27,000 rpm (oil/oil-air) • Weight / Mass: ~0.406 kg per bearing Commonly used in high-speed applications like CNC machine tool spindles and precision machinery.

RHP was an amalgamation in 1969 of the three major British bearing manufacturers, dating back as far as 1898. The three companies were Ransome & Marles (1917), Hoffmann Manufacturing (1898), and the Pollard Ball & Roller Bearing Company (1933). The combined company, Ransome Hoffmann Pollard (RHP), became a highly respected brand across the globe in the industrial and aerospace industries, and even today remains a world-leading brand in Super Precision Bearings. The sales & engineering functions of NSK and RHP have been merged, and the RHP manufacturing facilities brought under the guiding influence of NSK’s stringent manufacturing principles. The RHP brand stands for the principles of NSK's manufacturing and engineering excellence, matching roller bearings made in Europe to our customers' exacting specifications.

NSK offers a wide lineup of precision angular contact ball bearings where customers to choose the optimum specification of bearing according to the needs of their application. NSK precision angular contact ball bearings provide the perfect solution for applications requiring high runout accuracy of rotating machine parts, such as the machine tool main spindles, or the application of faster rotating speeds.

Highly precise angular contact thrust ball bearings for precision ball screws have been designed specifically for each application. Lineup includes both a highly rigid series and high-capacity series.

NSK Spherical Roller Bearings are designed for high load capacity. EA, C and CD have pressed steel cages where as CA has machined brass cages. EA cage specially has high load capacity, low torque and has high strength cage. An oil groove and holes are provided in the outer ring to supply lubricant and the bearing numbers are suffixed with E4.

The cylindrical rollers are in linear contact with the raceways. They have a high radial load capacity and are suitable for high speeds. There are different types designated as NU, NJ, NUP, N, NF (for single-row bearings), NNU, and NN (for double-row bearings depending on the design or absence of side ribs).

Bearings of this type use conical rollers guided by a back-face rib on the cone. These bearings are capable of taking high radial loads and axial loads in one direction. In the HR series, the rollers are increased in both size and number giving it an even higher load capacity. They are generally mounted in pairs in a manner similar to single-row angular contact ball bearings. In this case, the proper internal clearance can be obtained by adjusting the axial distance between the cones or cups of the two opposed bearings.

Thrust ball bearings are classified into those with flat seats or aligning seats depending on the shape of the outer ring seat (housing washer). They can sustain axial loads but no radial loads.

This type of ball bearing is recommended when alignment of the shaft and housing is difficult and the shaft may flex. The outer ring has a spherical raceway and its center of curvature coincides with that of the bearing; therefore, the axis of the inner ring, balls and cage can deflect to some extent around the bearing center.

NSK manufactures a full range of deep groove ball bearings. These bearings are the most common type and are used in a wide variety of applications.

NSK range of angular contact ball bearings has been designed to meet the increasingly demanding requirements of original equipment manufacturers. These bearings have a contact angle so that they can sustain significant axial loads in one direction together with radial loads. NSK offers one of the most comprehensive ranges of angular contact ball bearings available.