Torrington Fafnir KP4A-FS428 Ball Bearing, 1/4" Bore

Precision miniature deep groove ball bearing designed for compact mechanical and industrial applications. The KP4A‑FS428 features a double‑sealed construction, non‑fill slot design, and hardened steel rings ideal for high‑speed, low‑friction operation. Technical Specifications: Manufacturer: Torrington / Fafnir Model: KP4A‑FS428 Bearing Type: Radial deep groove ball bearing Bore Diameter: 0.2500" (1/4") Outside Diameter: 0.7500" Overall Width: 0.2810" Outer Ring Width: 0.2190" Inner Ring Width: 0.2810" Row Type: Single row Fill Slot: Non‑fill slot Closure Type: Double sealed Cage Material: Steel Material: Hardened bearing steel Fillet Radius: Standard KP‑series (noted 0.8 mm equivalent) Precision Rating: Standard (not aircraft‑rated) Internal Clearance: C0 (normal clearance) Snap Ring Included: No Application: Compact machinery, instruments, small motors, precision mechanisms Condition: New in original manufacturer packaging Manufacture Country: USA