FAGSuper-Precision Angular Contact Spindle Bearing Pair – 10 mm Bore, 30 mm OD, 15 Degree Contact Angle, P4S

Product Description

What this part is

FAG B7200-C-T-P4S-DUL super-precision angular contact spindle bearing, supplied as a matched duplex pair. Bore: 10 mm. Outside Diameter: 30 mm. Width: 9 mm per bearing. Total Width: 18 mm for the pair. Contact Angle: 15°. Precision Class: P4S (ABEC 7/9). Preload: Light. Cage Material: Fabric-base laminate phenolic. Cage Type: Outer-ring land-riding. Rolling Elements: Steel balls. Bearing Material: 52100 chrome steel, rings and balls. Closure Type: Open. Number Of Rows: 1 per bearing. Series: B72. Base Number: B7200. Dynamic Load Rating: 6.9 kN per bearing. Static Load Rating: 2.95 kN per bearing. Design Units: Metric. Unit Quantity: 2 Pcs.

Decoding the designation

B — the spindle-bearing execution, ground to super-precision tolerances with matched face grinding.

7200 — the 72 dimension series at bore code 00, giving 10 x 30 x 9 mm.

C — 15° contact angle.

T — fabric-base laminate phenolic cage, guided on the outer ring land.

P4S — super-precision tolerance class, ABEC 7 dimensional with ABEC 9 running accuracy.

DUL — universally matchable duplex set of two, ground for light preload.

What these specs mean in practice

Contact Angle: 15°. A 15° angle keeps the ball load line close to the radial plane, which limits ball centrifugal and gyroscopic effects and lets the bearing run faster than a 25° execution on the same envelope. It is the angle chosen where speed matters more than axial stiffness. Preload: Light, so the set runs with the balls held in continuous contact under a small axial force rather than with running clearance. That fixes the ball path, removes shaft float and holds running accuracy through speed and load changes. The phenolic cage is light, runs on the outer ring land, holds oil in its own structure and tolerates the acceleration a spindle imposes on the cage far better than pressed steel. Precision Class: P4S gives the bore, outside diameter and running accuracy needed for a grinding or high-speed milling spindle. Dynamic Load Rating: 6.9 kN. Static Load Rating: 2.95 kN.

Mounting data

Universally matchable: the faces are ground so any two bearings from the range can be set back-to-back, face-to-face or in tandem, and the light preload comes out of the grind when two are clamped together with their faces in contact. No spacers or shims are needed to establish it. Straight bore, straight outside diameter. Both rings need full shoulder support on the thrust-carrying faces. Cleanliness and a controlled fit decide the running accuracy the set actually delivers, so a P4S bearing is fitted on a shaft and into a housing held to matching tolerances.

Quantity and configuration

Unit Quantity: 2 Pcs. A matched pair from FAG’s universally matchable range, open on both faces.

Interchange guidance

The B7200 envelope is 10 x 30 x 9 mm, shared with the standard 7200 series at the same boundary dimensions, though a standard-precision 7200 is not a substitute for a P4S spindle bearing. 15°, light-preload numbers: SKF 7200 CD/P4ADGB, NSK 7200CTYNSULP4, Barden 200HDL. The HCB7200-C-T-P4S execution is the ceramic-ball version on the same envelope and is a related part rather than an equivalent. Searchable variants: B7200CB.T.P4S.DUL, B-7200-CB-T-P4S-DUL, B7200-C-T-P4S-DUL, B7200CTP4SDUL, 7200C, B7200C.