FAGSuper-Precision Spindle Bearing – 20 mm ID, 47 mm OD, 14 mm Width, Open, 15° Contact Angle, Universal Light Preload, ABEC 7

Product Description

What this part is

FAG B7204C.TPA.P4.UL super-precision spindle bearing, a single-row angular contact ball bearing in the B72 series. Bore: 20 mm. Outside Diameter: 47 mm. Overall Width: 14 mm. Contact Angle: 15°. Precision Class: P4 (ABEC 7). Cage Material: Phenolic, fabric-base laminate. Cage Type: Machined window. Preload: Light. Mounting Arrangement: Universally matchable. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Rolling Elements: Balls. Bearing Material: Bearing steel. Series: 7200. Country of Origin: Germany.

Decoding the designation

B marks the Schaeffler spindle-bearing range, built with large steel balls for high rigidity. 7204 gives the ISO series 02 envelope at a 20 mm bore. C is the contact angle code and fixes it at 15°. TPA is the fabric-base laminate phenolic cage, machined as a window cage. P4 is the precision grade, ABEC 7. UL is universal light preload.

What these specs mean in practice

Dynamic Load Rating: 17.2 kN (3,867 lbf). Static Load Rating: 8.0 kN (1,799 lbf). Limiting Speed: 48,000 rpm on minimal-quantity oil lubrication, 32,000 rpm on grease. Item Weight: 0.23 lb. Lubricant: grease or oil. Maximum Operating Temperature: 120 °C. Minimum Operating Temperature: -30 °C. The large-ball B72 construction pairs high load capacity with high rigidity at medium spindle speeds. A 15° contact angle carries more radial load and runs faster than a 25° or 40° angle, at lower thrust capacity. The machined phenolic window cage is light and quiet at speed, and it is what sets the 120 °C ceiling.

Quantity and configuration

Unit Quantity: 1 Pc. UL marks a universally matchable bearing: any two mount back-to-back, face-to-face or in tandem and reach the rated light preload when clamped, with no ground spacer.

Fitting notes

Bore Type: Straight, for an interference fit on the shaft with the inner ring rotating. Closure Type: Open, so lubricant is supplied from the housing. This bearing is a non-separable unit: the rings and the ball-and-cage assembly are solid and stay together. Harmonization Code: 8482.10.50.28.

Interchange guidance

Cross-Reference 1: SKF 7204 CDGA/P4. Cross-Reference 2: NSK 7204CTYNSULP4. Cross-Reference 3: Timken Fafnir 2MM204WI-SUL. Cross-Reference 4: B7204-C-T-P4S-UL (related designation, the same bearing at the tighter P4S grade). Searchable designation forms: B7204C.TPA.P4.UL, B7204-C-T-P4-UL, B7204CTPAP4UL, B7204C TPA P4 UL and 7204C.