Fafnir7204WAngular Contact Ball Bearing – 20 mm ID, 47 mm OD, 14 mm Width, Maximum Capacity Filling Slot, Pressed Brass Cage, Open.

Product Description

What this part is

Fafnir 7204W single-row angular contact ball bearing, maximum-capacity filling-slot design. Brand: Fafnir (Timken). Part Number: 7204W. Bore: 20 mm. Outside Diameter: 47 mm (1.8504 in). Overall Width: 14 mm (0.5512 in). Design Units: Metric. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Cage Material: Pressed brass. Cage Type: One-piece, ball-piloted. Bearing Material: 52100 through-hardened bearing steel. Item Weight: 0.104 kg (0.230 lb). GTIN: 087796046467.

Decoding the designation

Series: 7200 light series, ISO 02. Bore code 04 = 20 mm. The W marks Timken’s maximum-capacity filling-slot construction, with a low shoulder on the outer ring. Precision Rating: ABEC 1 / P0 — this is Timken’s standard industrial grade, distinct from the Fafnir MM super-precision spindle range that shares the 7200 number block. A bare 7204W with no trailing letters is the unground, individually packaged bearing. Preload: None.

What these specs mean in practice

Dynamic Load Rating: 16.8 kN (3,800 lbf). Static Load Rating: 8.1 kN (1,830 lbf). Max Temp: 120°C. The filling slot admits more balls into the raceway than a Conrad assembly allows, and that extra ball complement is what lifts the load rating above a non-slotted bearing on the same 20 x 47 x 14 mm envelope. A single-row angular contact bearing carries radial load together with thrust in one direction, so it pairs with an opposing bearing or a shaft shoulder to fix the shaft axially. The one-piece ball-piloted brass cage runs quietly and tolerates marginal lubrication.

Quantity and configuration

Unit Quantity: 1 Pc. Arrangement / Configuration: unground single, supplied individually. The universally flush-ground version of this bearing is the 7204W SU, and the factory-matched light-preload pair is the 7204W DU.

Mounting data

Shaft backing shoulder diameter: 29.920 mm. Housing backing shoulder diameter: 37.470 mm. Maximum shaft fillet radius: 1 mm (0.039 in). The outer ring is etched FAFNIR 7204W C1 USA and THRUST, the THRUST mark identifying the face that takes the thrust load. The C1 in the etch is a Timken manufacturing code.

Interchange guidance

Cross-References: ISO 7204 envelope 20 x 47 x 14 mm (dimensional equivalence), 7204W SU, 7204W DU, Torrington 7204W. Fafnir and Torrington both consolidated into Timken, so current production orders as a Timken 7204W. Harmonization Code: 8482.10.5028.

Designation variants

MPN Variants: 7204W, 7204-W, 7204 W, 7204W C1, 7204WC1, 7204WSU, 7204W SU, 7204WDU, 7204.