FAGB7205Super Precision Angular Contact Spindle Bearing – 25 mm Bore, 52 mm OD, 15 mm Width, 15° Contact Angle, ABEC 7 / P4, Light Preload

Product Description

What this part is

FAG B7205C.TPA.P4.UL super-precision angular contact spindle bearing. Bore Diameter: 25 mm. Outside Diameter: 52 mm. Overall Width: 15 mm. Contact Angle: 15°. Dynamic Load Rating: 14,800 N. Static Load Rating: 6,100 N. Limiting Speed: 28,000 rpm grease; 43,000 rpm oil. Precision Class: ABEC 7 / P4. Cage Material: Phenolic. Cage Type: Machined. Preload: Light. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Lubricant: grease or oil. Item Weight: 0.132 kg (0.29 lb). Bearing Material: Chrome steel. Unit Quantity: 1 Pc. Series: B72. Base Number: B7205.

Decoding the designation

B72 — FAG spindle bearing, heavy 02 dimension series. The thicker section carries more load than a B70 on the same bore.

05 — bore code. Bore Diameter: 25 mm.

C — 15° contact angle. On the FAG B-series the alternative is E at 25°.

TPA — fabric-base laminate phenolic cage, machined. Phenolic runs light and quiet at spindle speed and holds lubricant in the fabric matrix.

P4 — tolerance class P4, equivalent to ABEC 7.

UL — universally matchable, light preload. Any two bearings from this designation can be set back-to-back, face-to-face or in tandem and will come up to the published preload without shims or grinding.

What these specs mean in practice

Limiting Speed: 28,000 rpm grease; 43,000 rpm oil. On a 25 mm bore that is deep spindle territory, and it is what the 15° angle and the phenolic cage are both spent on.

Contact Angle: 15°. The shallow angle puts the load line near the radial plane, which favours speed and radial stiffness over thrust capacity.

Dynamic Load Rating: 14,800 N. Static Load Rating: 6,100 N. Fatigue load limit: 650 N. Distance between the apexes of the pressure cones: 12.7 mm — the effective spread, and the figure that sets moment stiffness in a duplex set.

Preload: Light. Preload force 80 N, lift-off force 248 N, axial rigidity 30 N/µm. The medium and heavy classes of the same bearing run 265 N and 531 N preload at 53 and 77 N/µm.

Operating temperature range: −30 °C to 100 °C.

Mounting data

Shaft shoulder diameter: 31.5 mm, tolerance h12. Outer ring shoulder diameter: 45.5 mm, tolerance H12. Maximum recess radius: 1 mm on the inner ring face, 0.3 mm on the outer. Minimum chamfer dimension: 1 mm. Oil injection pitch diameter: 34.4 mm minimum to 36.5 mm maximum.

Quantity and configuration

Unit Quantity: 1 Pc. One universally matchable single bearing, open on both faces.

Interchange guidance

The cross-references below share the 25 x 52 x 15 mm envelope, the 15° contact angle and the P4 class, and are direct substitutions in a universally matchable light-preload execution. Designation variants: B7205C.TPA.P4.UL, B-7205-C-TPA-P4-UL, B7205CTPAP4UL, B7205C.T.P4S.UL, B7205-C-T-P4S-UL, B7205C.TPA.P4.K5.UL, 7205-TG.