SNR7204CG1DUJ74Angular Contact Ball Bearing – Straight Bore, 20 mm ID, 47 mm OD, 14 mm Width, Open, 15° Contact Angle, Light Preload.

Product Description

What this part is

NTN-SNR 7204CG1DUJ74 super-precision angular contact ball bearing, ISO 7200 light series, 20 x 47 x 14 mm. Bore: 20 mm. Outside Diameter: 47 mm. Overall Width: 14 mm. Contact Angle: 15°. Number of Rows: 1. Rolling Elements: Ball. Bearing Material: Bearing steel. Bore Type: Straight. Closure Type: Open. Cage Material: Phenolic (laminated resin). Cage Type: Machined, outer-ring centred. Precision Class: ISO Class 4 (ABEC 7 / P4). Preload: Light. Internal Clearance: N/A. Series: 7200. Country of Origin: France. Unit Quantity: 2 Pcs.

Decoding the designation

7204 — ISO 7200 light series angular contact ball bearing on a 20 mm bore. C — Contact Angle: 15°. G1 — Cage Material: Phenolic (laminated resin), machined and centred on the outer ring. J74 — Preload: Light, at Precision Class: ISO Class 4 (ABEC 7 / P4). Searchable forms of the number: 7204CG1DUJ74, 7204 C G1 DU J74, 7204-C-G1-DU-J74, 7204CDUJ74, 7204 C DU J74.

What these specs mean in practice

A 15° contact angle favours speed and radial capacity; a 25° bearing on the same 20 x 47 x 14 mm envelope carries more thrust and less speed. Precision Class: ISO Class 4 (ABEC 7 / P4) gives tighter bore, outer-ring and runout tolerances than a standard-class bearing, which holds a spindle centred and lowers running vibration. Cage Material: Phenolic (laminated resin) is light, low-inertia and retains oil in its fabric base. Cage Type: Machined, outer-ring centred — the cage rides on the outer-ring land, which keeps it stable at high rotational speed. Preload: Light — the pair is ground so that clamping the rings sets a small axial load, giving stiffness and defined ball tracking with the least heat of the preload ladder. Internal Clearance: N/A, because a preloaded pair is set by preload rather than by a clearance class.

Quantity and configuration

Unit Quantity: 2 Pcs — a matched pair. The faces are universally ground, so the pair can be clamped back-to-back, face-to-face or in tandem and reaches its rated light preload in any of the three. Mounting Arrangement: Universal (DB, DF or DT).

Interchange guidance

Carton cross-references: FAG B7204-C-T-P4S-DUL, Fafnir 2MM204WI CR DUL, SKF 7204 CD/P4ADGA. Each is a 20 x 47 x 14 mm 15° universally matchable light-preload pair in ABEC 7 with a phenolic cage, so each is a direct substitution. A 7204 at 25°, or one at medium or heavy preload, shares the same envelope but changes the axial stiffness and speed of the spindle, and is a related size rather than an equivalent.