NSK7213C1TDTP4Angular Contact Ball Bearing – 65 mm ID, 120 mm OD, 23 mm Width, Open, 15 Degree, ABEC 7, Tandem Duplex Pair

Product Description

What this part is

NSK 7213C1TDTP4 is a matched tandem duplex pair of single-row angular contact ball bearings in the ISO 7213 size. Bore: 65 mm. Outside Diameter: 120 mm. Overall Width: 23 mm per bearing. Total Width: 46 mm across the stacked pair. Contact Angle: 15°. Precision Class: P4, ISO Class 4. Precision Rating: ABEC 7. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Bore Type: Straight. Closure Type: Open. Material: high carbon chrome steel.

Decoding the designation

7213 — NSK’s number for the ISO 7213 size, 65 x 120 x 23 mm.

C — 15° contact angle.

DT — duplex tandem. Two bearings ground so the load lines run parallel and both rows carry thrust in the same direction.

P4 — ISO Class 4 dimensional and running accuracy, ABEC 7.

What these specs mean in practice

Dynamic Load Rating: 92.0 kN. Static Load Rating: 58.5 kN. Permissible Axial Load: 40.0 kN. Limiting Speed: 12,500 rpm on grease, 19,000 rpm on oil or oil-air. Effective Load Centre: 23.9 mm. Calculation Factor f0: 14.6. Item Weight: 1.01 kg per bearing.

A 15° contact angle sets the load path close to the radial plane. That buys speed and radial stiffness and gives up some thrust capacity against a 30° or 40° execution on the same envelope. Tandem pairing adds the two thrust capacities together in one direction instead of splitting them between two.

Mounting data

Diameter of Shaft Abutment, da min: 74 mm. Diameter of Housing Abutment, Da max: 111 mm and Db max: 114 mm. Radius of Shaft or Housing Fillet, ra max: 1.5 mm and rb max: 0.8 mm. Bearing chamfer r min: 1.5 mm, r1 min: 1.0 mm. Recommended grease quantity: 5.3 g per bearing. Lubricant: grease or oil.

Quantity and configuration

Unit Quantity: 2 Pcs. The two bearings are a factory-ground tandem set and mount together as one unit.

Interchange guidance

The ISO 7213 envelope is common across makers, so a 65 x 120 x 23 mm angular contact bearing in a 15° execution at ABEC 7 is a like-for-like fit. Searchable forms of the number: 7213C1TDTP4, 7213 C1 T DT P4, 7213C1TDT, 7213CDT, 7213C. A 7213A runs 30° and a 7213B runs 40° on the same envelope — related sizes rather than substitutes, because the contact angle sets the thrust and speed behaviour.