FAGB7024CTPAP4K5ULSuper Precision Angular Contact Spindle Bearing – 120 mm ID, 180 mm OD, 28 mm Width, Open, 15° Contact Angle, Light Preload, P4S

Product Description

What this part is

FAG B7024C.TPA.P4S.UL super-precision angular contact spindle bearing. Series: B70. Bore: 120 mm. Outside Diameter: 180 mm. Width: 28 mm. Single row, open, universally matchable for pair and set mounting. Country of origin: Germany.

Decoding the designation

B70 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 653 N. The Fafnir carton cross-reference 2MM9124WI carries the same 15° angle on the same envelope.

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: 115 kN (25,853 lbf). Static Load Rating: 82.0 kN (18,434 lbf). Fatigue Load Limit: 7.1 kN. Axial rigidity at light preload: 123 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 per unit. 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: 131 mm to h12. Housing shoulder diameter: 169 mm to H12. Maximum recess radius: 2 mm. Minimum chamfer dimension: 2 mm. Distance between the pressure cone apexes: 34.1 mm. Grease injection pitch diameter: 138.6 mm to 145.1 mm. Operating temperature range: -30 °C to 100 °C.

Interchange guidance

Schaeffler’s current designation is B7024-C-T-P4S-UL, which replaces both B7024C.T.P4S.UL and B7024C.TPA.P4.UL. Fafnir equivalent: 2MM9124WI. Related sizes on the same envelope: B7024-E-T-P4S-UL at 25°, and B7024-C-2RSD-T-P4S-UL with non-contact seals both sides.