FAGB7220CTPAP4ULSuper Precision Angular Contact Spindle Bearing – 100 mm ID, 180 mm OD, 34 mm Width, Open, 15° Contact Angle, Light Preload, P4S

Product Description

What this part is

FAG B7220C.TPA.P4.UL super-precision angular contact spindle bearing. Series: B72. Bore: 100 mm. Outside Diameter: 180 mm. Width: 34 mm. Single row, open, universally matchable for pair and set mounting. Country of origin: Germany.

Decoding the designation

B72 is the spindle bearing series. C sets the Contact Angle at 15°. TPA and T both denote a machined fabric-base laminate phenolic cage. P4S is the tolerance class, held tighter than P4 to ISO 492. U marks a universally ground single bearing and L sets light preload at 789 N.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity. This section turns at 12,000 rpm on oil and 7,500 rpm on grease. Dynamic Load Rating: 135 kN. Static Load Rating: 88.0 kN. Fatigue Load Limit: 7.8 kN. Axial rigidity at light preload: 121 N per micrometre. The phenolic cage is light and self-lubricating, so ball guidance stays steady at spindle speeds where a brass cage would add mass.

Quantity and configuration

One bearing. The UL execution is universally ground, so it runs alone or pairs with another UL piece back-to-back, face-to-face or in tandem, with light preload set by the ground faces.

Fitting notes

Shaft shoulder diameter: 114.5 mm to h12. Housing shoulder diameter: 165.5 mm to H12. Maximum recess radius: 2.1 mm. Minimum chamfer dimension: 2.1 mm. Distance between the pressure cone apexes: 35.8 mm. Grease injection pitch diameter: 126.6 mm to 134.4 mm. Operating temperature range: -30 °C to 100 °C.

Interchange guidance

Schaeffler’s current designation is B7220-C-T-P4S-UL, which replaces both B7220C.T.P4S.UL and B7220C.TPA.P4.UL. FAG B7220-E-T-P4S-UL and NSK 7220A5TRSULP4 share the envelope but run a 25° contact angle against 15° here.