FAGB7219E.TPA.P4.ULSuper Precision Angular Contact Spindle Bearing – 95 mm ID, 170 mm OD, 32 mm Width, Open, 25° Contact Angle, Light Preload, P4S

Product Description

What this part is:

FAG B7219E.TPA.P4.UL super-precision angular contact spindle bearing. Series: B72. Bore: 95 mm. Outside Diameter: 170 mm. Width: 32 mm. Single row, open, universally matchable for pair and set mounting. Country of origin: Germany.

Decoding the designation:

B72 is the spindle bearing series. E sets the Contact Angle at 25°. 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 1,184 N. The Fafnir cross-reference 3MM219 carries the same 25° angle.

What these specs mean in practice:

A 25° contact angle carries more thrust and less speed than a 15°. Dynamic Load Rating: 124 kN (27,876 lbf). Static Load Rating: 78.0 kN (17,535 lbf). Fatigue Load Limit: 7.1 kN. Limiting speed: 7,000 rpm on grease, 11,000 rpm on oil. Axial rigidity at light preload: 273 N per micrometre. The phenolic cage is light and self-lubricating, holding ball guidance 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: 110.5 mm to h12. Housing shoulder diameter: 154 mm to H12. Maximum recess radius: 2.1 mm. Minimum chamfer dimension: 2.1 mm. Distance between the pressure cone apexes: 46.9 mm. Grease injection pitch diameter: 119.1 mm to 126.9 mm, so the outer ring accepts relubrication through the housing. Operating temperature range: -30 °C to 100 °C.

Interchange guidance:

Schaeffler’s current designation is B7219-E-T-P4S-UL, which replaces both B7219E.T.P4S.UL and B7219E.TPA.P4.UL. Searchable variants: B7219ETPAP4UL, B7219E TPA P4 UL, B-7219-E-T-PA-P4-UL. The Fafnir equivalent is 3MM219WI. NSK 7219A sits on the same envelope at 30°, a related size rather than a substitution.