INA3207J2ZDouble-Row Angular Contact Ball Bearing – 35 mm Bore, 72 mm OD, 27 mm Width, 30° Contact Angle, Shields Both Sides

Product Description

What this part is

3207 double-row angular contact ball bearing, straight bore, shielded on both sides. Bore / Shaft Size: 35 mm. Outside Diameter: 72 mm. Overall Width: 27 mm, 1-1/16 in. Contact Angle: 30°. Number Of Rows: 2. Rolling Elements: balls. Bore Type: cylindrical, straight. Closure Type: shields both sides. Cage Material: pressed steel. Internal Clearance: CN, axial. Design Units: Metric. Unit Quantity: 2 Pcs.

Decoding the designation

32 — the double-row angular contact ball bearing series, two ball rows in one pair of solid rings, without a filling slot.

07 — the bore code: 07 x 5 gives the 35 mm bore.

J — pressed steel cage.

2Z — non-contact shields on both sides.

30° — the contact angle carried by the 3200 series.

What these specs mean in practice

A double-row angular contact bearing does the work of a back-to-back pair of single-row bearings inside one pair of rings. The two ball rows sit at opposing 30° contact angles, so the bearing carries radial load plus thrust in both directions and resists a tipping moment across the 27 mm width. That is what makes it the standard fit for pump shafts, gearbox input shafts, worm gear sets, and any position where a shaft has to be located axially in both directions from a single seat.

Contact Angle: 30° is a thrust-biased angle. It gives markedly more axial capacity than a deep groove bearing on the same envelope and rather less permissible speed, which is the correct trade where the load is combined rather than purely radial.

The shields on both sides retain grease and keep coarse contamination out with no rubbing contact, so they add no running torque of their own. Internal Clearance: CN on this type is an axial clearance across the two rows, not a radial group.

Quantity and configuration

Unit Quantity: 2 Pcs. Two bearings ship together. Each is a complete double-row unit and stands alone; they are not a matched or preloaded set, so either can be fitted on its own.

Mounting data

Shaft seat 35 mm straight; housing bore 72 mm; seat length 27 mm, 1-1/16 in. A single seat locates the shaft in both axial directions, so the opposite bearing position can be left free to float.

Interchange guidance

3207 is the ISO designation for this 35 x 72 x 27 mm envelope and is carried across makers; 5207 is the equivalent number in the MRC and Fafnir inch-market scheme, and ZZ is the shield code used in place of 2Z. Bearing Material: chrome steel. Match the closure and the cage as well as the size: a sealed 2RS execution and an open execution both exist on this envelope and change the running torque and the speed.