NSK7214CTYDBC7P5Angular Contact Ball Bearing – 70 mm ID, 125 mm OD, 24 mm Width, 15 Degree Contact Angle, Ball-Guided Cage, Back-to-Back Arrangement, ABEC 5

Product Description

What this part is

NSK 7214CTYDBC7P5 angular contact ball bearings, supplied as a back-to-back matched pair. Series: ISO 02 (72xx). Bore: 70 mm. Outside Diameter: 125 mm. Width: 24 mm per bearing. Contact Angle: 15°. Cage Type: Ball-guided. Preload: NSK class C7. Precision Class: P5, ABEC 5. Rolling Elements: Ball. Bore Type: Straight.

Decoding the designation

7214 — NSK’s number for the ISO 7214 size, 70 x 125 x 24 mm, dimension series 02.

C — 15° contact angle.

TY — ball-guided cage.

DB — back-to-back matched pair.

C7 — NSK preload class C7, a set preload built into the ground faces.

P5 — precision class P5, equivalent to ABEC 5.

What these specs mean in practice

Dynamic Load Rating: 100 kN per bearing. Static Load Rating: 64.5 kN per bearing. Limiting Speed: 11,800 r/min on grease and 18,000 r/min on oil-air, single bearing. Contact Angle: 15°. Effective load centre a: 25.1 mm. Chamfer r min: 1.5 mm. Chamfer r1 min: 1 mm. Mass: 1.09 kg per bearing. Precision Class: ABEC 5.

A back-to-back arrangement sets the two load lines diverging outward from the shaft centreline, which spreads the effective support base and gives the pair real moment stiffness. That is the arrangement used at the working end of a machine tool spindle. A 15° contact angle keeps the load path close to radial, so the pair runs faster and cooler than a 25° or 30° equivalent while carrying less thrust. The C7 preload arrives ground into the faces, so the pair clamps up against a plain spacer with no shim setting.

Mounting data

Shaft abutment diameter da: 79 mm minimum. Housing abutment diameter Da: 116 mm maximum. Shaft or housing fillet radius ra: 1.5 mm maximum. Mounted back-to-back, the two outer ring faces meet at the centre of the pair and the preload is taken up as the inner rings are clamped.

Quantity and configuration

Unit Quantity: 2 Pcs. A back-to-back matched pair, ground as a set.

Interchange guidance

Equivalent 15° executions on the same envelope: SKF 7214 CD/P5DB, FAG B7214-C-T-P5-DB, RHP 7214CTDULP5. Searchable variants of the designation: 7214CTYDBC7P5, 7214-C-TY-DB-C7-P5, 7214C TY DB C7 P5, 7214CTYP5, 7214C. A 7214A5 or 7214A on the same envelope carries a 25° or 30° angle, which changes the thrust capacity, the load centre and the speed rating.