FAGB7206CTPAP4ULSuper-Precision Angular Contact Ball Bearing 30 x 62 x 16 mm, 15° Contact Angle, ABEC 7, Polyamide Cage, Universal Light Preload

Product Description

What this part is

A FAG B7206-C-TPA-P4-UL super-precision angular contact ball bearing, 30 mm bore, 62 mm outside diameter, 16 mm wide. This is a machine-tool spindle bearing: raceways ground to super-precision running accuracy, a 15° contact angle, and ring faces prepared so the bearing can be stacked in matched sets. A single-row angular contact bearing carries thrust in one direction only, taking that thrust and its radial load through the same contact ellipse.

Decoding the designation

B7 is the FAG super-precision spindle bearing series. 2 and 06 give the ISO 72 medium dimension series and the bore code, 30 mm at five millimetres per unit. C sets the contact angle at 15°; an E in that position would be 25°. TPA is the glass-fibre reinforced polyamide cage. P4 is ISO tolerance class 4, equivalent to ABEC 7. UL is the universal design at light preload.

What these specs mean in practice

A 15° contact angle runs faster and carries less thrust than a 25° bearing of the same size, because the shallower angle puts less of the ball load into the axial direction and generates less heat from ball spin at speed. That makes the C angle the choice on high-speed grinding and milling spindles where cutting thrust is modest, and the E angle the choice where thrust and axial stiffness matter more than surface speed. Light preload keeps heat generation and power draw down at the cost of some axial rigidity. The polyamide cage is light and quiet, tolerates shock and momentary lubricant starvation, and has a practical continuous ceiling of 120 °C, above which the phenolic and machined brass cages take over.

Arrangement and matching

The UL universal design means the ring faces are ground so any two bearings of this designation come together at light preload in a back-to-back (DB), face-to-face (DF) or tandem (DT) stack with no spacers or shims. DB gives the widest effective bearing spread and the best resistance to moment load, DF tolerates more misalignment, and DT doubles thrust capacity in one direction only.

Quantity and configuration

1 Pc. Bearing only, open both faces, no seals or shields. Supplied without spacers, without a locknut and without a preload sleeve.

Fitting notes

Super-precision spindle bearings are mounted clean, with the marked ring faces oriented to the intended arrangement, and pressed by an even axial force on the ring being fitted rather than through the balls. Shaft and housing seats want to be ground to a tolerance matching P4, since seat form error transfers directly into spindle runout at this accuracy level.

Interchange guidance

The genuine interchange is another maker’s 15° super-precision 30 x 62 x 16 spindle bearing at ABEC 7 with universal light preload: NSK 7206CTRDULP4, SKF 7206 CD/P4A, or the FAG HCB7206-C-T-P4S-UL hybrid-ceramic variant. B7206-E-TPA-P4-UL is a related size, not a substitution, because its 25° angle changes the thrust and speed balance, and B7206-C-TPA-P4-UM changes the preload to medium. B7006-C-TPA-P4-UL shares the 30 mm bore in the lighter 70 series at 30 x 55 x 13 and does not fit this seat.